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Dr Roberto Moreno-Atanasio

Lecturer

School of Engineering (Chemical Engineering)

Career Summary

Biography

Dr. Roberto Moreno-Atanasio is currently a Lecturer at the Centre for Advanced Particle Processing and Transport at the University of Newcastle, Australia. His main area of research involves the study of the behaviour of granular solids and powders in the presence and absence of fluid-solid interactions using Discrete Element Method (DEM) and the study of the behaviour of nanocolloidal suspensions. Dr. Moreno-Atanasio obtained his PhD in 2003 from the University of Surrey, UK and joined the Institute of Particle Science and Engineering at the University of Leeds as a postdoctoral researcher. The research work of Dr. Moreno-Atanasio has been previously sponsored by ICI, BNFL and the Engineering and Physical Research Council UK.

Research Expertise
The investigations that I have carried out during the last ten years involve computer simulations based on the Discrete Element Method (DEM) of granular systems in the presence or absence of fluid interactions and more recently suspensions of nanoparticles. One of the main fields of research during my career has been to establish a link between the physical properties of single particles and the bulk particle behaviour paying special attention to interparticle interactions and to the nature of force propagation. During my PhD period I developed a deep knowledge of Contact Mechanics especially between adhesive particles, which was necessary for understanding and interpreting the bulk behaviour based on single particle properties. Amongst other problems I have studied mechanical strength and failure of aggregates, flowability of cohesive powders, fluidization and segregation. During my last project I investigated the self-assembly and disassembly of aggregates made of inorganic nanoparticles which are coated with an organic monolayer. I have developed a model to simulate these processes as they are triggered by a change in the pH of the medium. I have also gained experience in the area of X-ray microtomography in order to be able to link in a effective way the microstructures predicted by computer simulation with the structures of real materials for different case studies. In general, I am interested in computational analysis and software development of any type of physical, chemical, or biological systems of industrial or human interest. I am especially keen in the multidisciplinary investigations that can provide a ‘workbench’ to improve or assist in the development of present or future technologies and therefore contribute to the enrichment of quality of life.

Teaching Expertise
Thermodynamics, Partial Differential Equations, Statistics, Numerical Analysis, Design projects.

Administrative Expertise
* Library Liaison Officer for Chemical Engineering, * Member of the Faculty Committee * 2nd year undergraduate adviser. * Member of the Marketing Committee * Member of the Student Experience Evaluation Committee.

Collaborations
My collaborators are in disciplines that combine with my main expertise in Discrete Element Method (DEM). Within the Department of Chemical Engineering Dr. Grant Webber, who is an expert in Atomic Force Microscopy (AFM) contribute to the determination of interparticle interactions in dry and wet powder systems. Within Tunra Bulk Solids at the University of Newcastle, Prof. Mark Jones, Drs Williams, Wheeler and Wensrich that work in experimental and computational using AFM are my main collaborators.


Qualifications

  • PhD, University of Surrey - UK
  • Bachelor of Science (Physics), University of Seville - Spain

Keywords

  • Chemical Engineering
  • Computer simulations
  • Granular materials
  • Interparticle interactions
  • Magnetism
  • Multiphase flow
  • Nanocolloidal suspensions
  • Numerical methods
  • Particle Technology
  • Powder and solids
  • Thermodynamics

Languages

  • Spanish (Fluent)

Fields of Research

CodeDescriptionPercentage
090406Powder and Particle Technology55
030603Colloid and Surface Chemistry45

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
9/02/2015 - 8/02/2016LecturerUniversity of Newcastle
School of Engineering
Australia

Academic appointment

DatesTitleOrganisation / Department
1/01/2009 - Membership - Institution of Chemical Engineering. IChemEInstitution of Chemical Engineering
Australia
1/01/2009 - Membership - Australasian Particle Technology SocietyAustralasian Particle Technology Society
Australia
1/10/2002 - 1/11/2008Postgraduate Research FellowThe University of Leeds
School of Process, Environmental and Materials Engineering
United Kingdom
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Chapter (3 outputs)

YearCitationAltmetricsLink
2008Moreno-Atanasio R, Antony SJ, Williams RA, 'Equilibrium and kinetic properties of self-assembled Cu nanoparticles: Computer simulation', Composites with micro- and nano-structure : computational modeling and experiments, Springer, Berlin, Germany 9-27 (2008) [B1]
Co-authorsRoberto Moreno-Atanasio
2007Ghadiri M, Moreno-Atanasio R, Hassanpour A, Antony SJ, 'Chapter 19 Analysis of Agglomerate Breakage', 837-872 (2007)
DOI10.1016/S0167-3785(07)12022-4
Co-authorsRoberto Moreno-Atanasio
2007Moreno-Atanasio R, 'Analysis of Agglomerate Breakage', Particle Breakage: Handbook of Powder Technology, Elsevier, Amsterdam, Netherlands 837-872 (2007) [B1]
Co-authorsRoberto Moreno-Atanasio

Journal article (32 outputs)

YearCitationAltmetricsLink
2015Seyfaee A, Neville F, Moreno-Atanasio R, 'Experimental results and theoretical modeling of the growth kinetics of polyamine-derived silica particles', Industrial and Engineering Chemistry Research, 54 2466-2475 (2015)

Polyamine-derived silica particles are proposed to grow due to primary particle (<25 nm) aggregation. On the basis of material balance, we propose an aggregation model to predict the kinetics of polyamine-derived silica formation. The model is based on a rate equation consisting of two terms, representing both the production and aggregation of primary particles. The modeled rate constants were found to be a function of the concentration of silica precursor and biomimetic catalyst. Our experimental results agree with our model and suggest that the cube root of the silica precursor concentration is linearly proportional to particle diameter, as well as that below a critical concentration (~25 mM) no particles will be formed. If the concentration of reagents was high enough to produce particles with diameters greater than ~350 nm, other populations of particles, each of them growing at different rates, were necessary to describe the overall particle diameter observed, which was modeled as the average diameter of these different populations.

DOI10.1021/acs.iecr.5b00093
Co-authorsFrances Neville, Roberto Moreno-Atanasio
2015Hyde ED, Moreno-Atanasio R, Millner PA, Neville F, 'Surface charge control through the reversible adsorption of a biomimetic polymer on silica particles.', J Phys Chem B, 119 1726-1735 (2015)
DOI10.1021/jp5100439Author URL
CitationsScopus - 1
Co-authorsRoberto Moreno-Atanasio, Frances Neville
2015Van Netten K, Galvin KP, Moreno-Atanasio R, 'A Kinetic Study of a Modified Fine Coal Agglomeration Process', Procedia Engineering, 102 508-516 (2015)
DOI10.1016/j.proeng.2015.01.201
Co-authorsRoberto Moreno-Atanasio, Kevin Galvin
2015Evans GM, Evans SC, Moreno-Atanasio R, 'Sinking in Quicksand: An Applied Approach to the Archimedes Principle', Chemical Engineering Education, 49 81-87 (2015)
Co-authorsRoberto Moreno-Atanasio, Geoffrey Evans
2014Zahedi P, Saleh R, Moreno-Atanasio R, Yousefi K, 'Influence of fluid properties on bubble formation, detachment, rising and collapse; Investigation using volume of fluid method', Korean Journal of Chemical Engineering, 31 1349-1361 (2014) [C1]

Numerical simulations have been carried out to investigate the formation and motion of single bubble in liquids using volume-of-fluid (VOF) method using the software platform of FLUENT 6.3. Transient conservation mass and momentum equations with considering the effects of surface tension and gravitational force were solved by the pressure implicit splitting operator (PISO) algorithm to simulate the behavior of gas-liquid interface movements in the VOF method. The simulation results of bubble formation and characteristics were in reasonable agreement with experimental observations and available literature results. Effects of fluid physical properties, operation conditions such as orifice diameter on bubble behavior, detachment time, bubble formation frequency and bubble diameter were numerically studied. The simulations showed that bubble size and bubble detachment times are linear functions of surface tension and decrease exponentially with the increase in liquid density. In contrast, only a small influence of the fluid viscosity on bubble size and detachment time was observed. Bubble collapse at a free surface simulation with VOF method was also investigated. © 2014 Korean Institute of Chemical Engineers, Seoul, Korea.

DOI10.1007/s11814-014-0063-x
Co-authorsRoberto Moreno-Atanasio
2014Seyfaee A, Moreno-Atanasio R, Neville F, 'High-resolution analysis of the influence of reactant concentration on nucleation time and growth of polyethyleneimine-trimethoxymethylsilane particles', Colloid and Polymer Science, (2014) [C1]

High-resolution dynamic light scattering (DLS), scanning electron microscopy (SEM), time-lapse photography, and attenuated total reflectance Fourier transform infrared spectroscopy were used to analyze the growth kinetics of polyethyleneimine (PEI)-silica particles fabricated from the condensation of hydrolyzed trimethoxymethylsilane (TMOMS) and PEI/phosphate buffer (PEI/PB). Depending on the concentration of hydrolyzed TMOMS and PEI/PB, three stages were identified. We observed the existence of a nucleation time that has never been reported in the literature when TMOMS has been used. During this nucleation time, particles of less than 25 nm were detected using in situ DLS measurements taken every 15 s (high resolution), a DLS time-scale resolution not previously reported. In addition, the length of the nucleation time depended mainly on the PEI/PB concentration, but also TMOMS concentration. The growth stage was evident from the rapid increase of particle size with time. Due to the high resolution of the DLS measurements, a peak could be observed in the particle diameter during particle growth, which corresponds to a secondary population of particles required for the larger particles to further increase in size. Finally, during the equilibrium region, particles reached their maximum diameter that was independent of the concentration of PEI/PB and only changed with concentration of hydrolyzed TMOMS. © 2014 Springer-Verlag Berlin Heidelberg.

DOI10.1007/s00396-014-3312-y
CitationsScopus - 2Web of Science - 2
Co-authorsRoberto Moreno-Atanasio, Frances Neville
2014Van Netten K, Moreno-Atanasio R, Galvin KP, 'Fine particle beneficiation through selective agglomeration with an emulsion binder', Industrial and Engineering Chemistry Research, 53 15747-15754 (2014) [C1]

A high internal phase (HIP) water-in-oil emulsion was used as the binder in the selective agglomeration of fine coal from an aqueous suspension of coal and mineral particles. Traditionally, this agglomeration is achieved by a pure oil, hydrophobic, binder. However, the high cost associated with using pure oil makes the process economically unfeasible. Therefore, the emulsion binder introduced in this work was motivated by the economic need to reduce the amount of organic liquid required in the process. The effect of the agitation time during the agglomeration process and the composition of the emulsion on its performance as a binder were investigated. The best result obtained was for a HIP emulsion made from 3 wt % aqueous NaCl and diesel oil with sorbitan monooleate as the emulsifier. This emulsion had a dispersed phase volume fraction of 0.94 and achieved a 7.5-fold reduction in the amount of organic liquid required to achieve agglomeration.

DOI10.1021/ie5027502
Co-authorsRoberto Moreno-Atanasio, Kevin Galvin
2014Liyanaarachchi KR, Webber GB, van Netten K, Moreno-Atanasio R, Galvin KP, 'Selective collection of fine particles by water drops', Advanced Powder Technology, (2014) [C1]

This study was concerned with the interaction between a gaseous dispersion of fine particles travelling in the horizontal direction and discrete drops of water falling vertically through the dispersion. A simple analytical model of the particle-drop collision was developed to describe the particle recovery by the drops as a function of the water flux, covering two extremes of relative velocity between the particles and drops. The Discrete Element Method was used to validate the analytical model. Further validation of the model and insights were obtained through experimental studies. The physical process of wetting was observed to be important in influencing the tendency of particles to become engulfed by the drops of water, or to either adhere to the drops or by-pass the drops altogether. Hydrophilic particles were readily engulfed while hydrophobic particles, at best, adhered to the surface of the drop, or failed to attach. Moreover, the recovery of the hydrophilic silica particles was significantly higher than the recovery of hydrophobic coal particles, with the selectivity ratio approximately 1.5. Spherical ballotini particles were the most sensitive, with a notable increase in recovery when cleaned, and evidence of increased recovery with increasing particle size. The recovery of irregular shaped silica flour particles, however, was largely independent of the particle size. A similar result was observed for irregular coal particles, though the recoveries were all lower than relatively more hydrophilic ballotini or silica flour. Crown Copyright © 2014.

DOI10.1016/j.apt.2014.03.009
Co-authorsGrant Webber, Kevin Galvin, Roberto Moreno-Atanasio
2014Gao Y, Evans GM, Wanless EJ, Moreno-Atanasio R, 'DEM simulation of single bubble flotation: Implications for the hydrophobic force in particle-bubble interactions', Advanced Powder Technology, 25 1177-1184 (2014) [C1]
DOI10.1016/j.apt.2014.05.020
Co-authorsErica Wanless, Geoffrey Evans, Roberto Moreno-Atanasio
2014Gao Y, Evans GM, Wanless EJ, Moreno-Atanasio R, 'DEM simulation of single bubble flotation: Implications for the hydrophobic force in particle-bubble interactions', Advanced Powder Technology, 25 1177-1184 (2014) [C1]

A 3D Discrete Element Method simulation model for a single bubble was developed in order to investigate the capture of hydrophobic particles. The bubble was considered stationary at the centre of the working space. Particle-particle and particle-bubble contacts were simulated using a linear spring-dashpot model. Gravitational, buoyancy, drag and hydrophobic forces were taken into account. The hydrophobic force was estimated through a single exponential decay law which depends on a preexponential parameter K and a decay length ¿ It was observed that when k was less than 10 nm, the number of the particles that were collected was independent of the strength of the hydrophobic force. In contrast, for values of k within the range of 10-500 nm, the capture efficiency increased significantly with the strength of the hydrophobic force and ¿ We have also demonstrated how these two parameters affect the particle trajectory around the bubble and thus produce a significant difference in particle collection when the strength and range of the hydrophobic force were varied.

DOI10.1016/j.apt.2014.05.020
Co-authorsRoberto Moreno-Atanasio, Erica Wanless, Geoffrey Evans
2013van Netten K, Zhou J, Galvin KP, Moreno-Atanasio R, 'Influence of magnetic and hydrodynamic forces on chain-aggregation and motion of magnetisable particles and composites', CHEMICAL ENGINEERING SCIENCE, 93 229-237 (2013) [C1]
DOI10.1016/j.ces.2013.01.028Author URL
CitationsScopus - 3Web of Science - 2
Co-authorsKevin Galvin, Roberto Moreno-Atanasio
2013Moreno-Atanasio R, 'Influence of the hydrophobic force model on the capture of particles by bubbles: A computational study using Discrete Element Method', ADVANCED POWDER TECHNOLOGY, 24 786-795 (2013) [C1]
DOI10.1016/j.apt.2013.05.001Author URL
CitationsScopus - 1Web of Science - 1
Co-authorsRoberto Moreno-Atanasio
2012Maxwell RK, Ata S, Wanless EJ, Moreno-Atanasio R, 'Computer simulations of particle-bubble interactions and particle sliding using Discrete Element Method', Journal of Colloid and Interface Science, 381 1-10 (2012) [C1]
CitationsScopus - 5Web of Science - 4
Co-authorsErica Wanless, Roberto Moreno-Atanasio, Seher Ata
2012Moreno-Atanasio R, 'Energy dissipation in agglomerates during normal impact', Powder Technology, 223 12-18 (2012) [C1]
CitationsScopus - 5Web of Science - 6
Co-authorsRoberto Moreno-Atanasio
2012MacPherson SA, Webber GB, Moreno-Atanasio R, 'Aggregation of nanoparticles in high ionic strength suspensions: Effect of Hamaker constant and particle concentration', Advanced Powder Technology, 23 478-484 (2012) [C1]
CitationsScopus - 4Web of Science - 3
Co-authorsRoberto Moreno-Atanasio, Grant Webber
2011Yung S, Ledran M, Moreno-Gimeno I, Conesa A, Montaner D, Dopazo J, et al., 'Large-scale transcriptional profiling and functional assays reveal important roles for Rho-GTPase signalling and SCL during haematopoietic differentiation of human embryonic stem cells', HUMAN MOLECULAR GENETICS, 20 4932-4946 (2011)
DOI10.1093/hmg/ddr431Author URL
CitationsScopus - 9Web of Science - 9
Co-authorsRoberto Moreno-Atanasio
2010Moreno-Atanasio R, Xiaodong J, Williams RA, 'Combining X-ray microtomography with computer simulation for analysis of granular and porous materials', Particuology: science and technology of particles, 8 81-99 (2010) [C1]
DOI10.1016/j.partic.2010.01.001
CitationsScopus - 41Web of Science - 31
Co-authorsRoberto Moreno-Atanasio
2010Angst J, Meyer TD, Adolfsson R, Skeppar P, Carta M, Benazzi F, et al., 'Hypomania: A transcultural perspective', World Psychiatry, 9 41-49 (2010)

This study examined the transcultural robustness of a screening instrument for hypomania, the Hypomania Checklist-32, first revised version (HCL-32 R1). It was carried out in 2606 patients from twelve countries in five geographic regions (Northern, Southern and Eastern Europe, South America and East Asia). In addition, GAMIAN Europe contributed data from its members. Exploratory and confirmatory factor analyses were used to examine the transregional stability of the measurement properties of the HCL-32 R1, including the influence of sex and age as covariates. Across cultures, a two-factor structure was confirmed: the first factor (F1) reflected the more positive aspects of hypomania (being more active, elated, self-confident, and cognitively enhanced); the second factor (F2) reflected the more negative aspects (being irritable, impulsive, careless, more substance use). The measurement properties of the HCL-32 R1 were largely invariant across cultures. Only few items showed transcultural differences in their relation to hypomania as measured by the test. F2 was higher among men and in more severe manic syndromes; F1 was highest in North and East Europe and lowest in South America. The scores decreased slightly with age. The frequency of the 32 items showed remarkable similarities across geographic areas, with two exceptions: South Europeans had lower symptom frequencies in general and East Europeans higher rates of substance use. These findings support the international applicability of the HCL-32 R1 as a screening instrument for hypomania.

CitationsScopus - 35
Co-authorsRoberto Moreno-Atanasio
2010Tilgner K, Atkinson SP, Yung S, Golebiewska A, Stojkovic M, Moreno R, et al., 'Expression of GFP Under the Control of the RNA Helicase VASA Permits Fluorescence-Activated Cell Sorting Isolation of Human Primordial Germ Cells', STEM CELLS, 28 84-92 (2010)
DOI10.1002/stem.263Author URL
CitationsScopus - 16Web of Science - 16
Co-authorsRoberto Moreno-Atanasio
2010Armstrong L, Tilgner K, Saretzki G, Atkinson SP, Stojkovic M, Moreno R, et al., 'Human Induced Pluripotent Stem Cell Lines Show Stress Defense Mechanisms and Mitochondrial Regulation Similar to Those of Human Embryonic Stem Cells', STEM CELLS, 28 661-673 (2010)
DOI10.1002/stem.307Author URL
CitationsScopus - 100Web of Science - 94
Co-authorsRoberto Moreno-Atanasio
2009Moreno-Atanasio R, Antony SJ, Williams RA, 'Influence of interparticle interactions on the kinetics of self-assembly and mechanical strength of nanoparticulate aggregates', Particuology: science and technology of particles, 7 106-113 (2009) [C1]
DOI10.1016/j.partic.2009.01.008
CitationsScopus - 14Web of Science - 12
Co-authorsRoberto Moreno-Atanasio
2008Ahmadi MT, Ismail R, Tan MLP, Arora VK, 'The Ultimate Ballistic Drift Velocity in Carbon Nanotubes', JOURNAL OF NANOMATERIALS, (2008) [C1]
DOI10.1155/2008/769250Author URL
CitationsScopus - 24Web of Science - 20
Co-authorsRoberto Moreno-Atanasio
2008Antony SJ, Moreno-Atanasio R, Musadaidzwa J, Williams R, 'Impact fracture of composite and homogeneous nanoagglomerates', Journal of Nanomaterials, 2008 1-7 (2008) [C1]
DOI10.1155/2008/769250
CitationsScopus - 4Web of Science - 2
Co-authorsRoberto Moreno-Atanasio
2007Moreno-Atanasio R, Xu BH, Ghadiri M, 'Computer simulation of the effect of contact stiffness and adhesion on the fluidization behaviour of powders', CHEMICAL ENGINEERING SCIENCE, 62 184-194 (2007) [C1]
DOI10.1016/j.ces.2006.08.036Author URL
CitationsScopus - 18Web of Science - 15
Co-authorsRoberto Moreno-Atanasio
2006Moreno-Atanasio R, Antony SJ, 'Micromechanical behaviour of granular media: Effects of contact stiffnesses', Proceedings of the 5th International Conference on Engineering Computational Technology, (2006)

Recent findings on the influence of single-particle properties on the bulk behaviour of dense particulate assemblies are analysed by using computer simulations based on 3-D Distinct Element Method (DEM). The micromechanical behaviour of dense systems depends on the ability of the particles to deform along the normal and tangential directions on the contact plane, i.e., the values of normal and tangential particle contact stiffnesses. In the present study, we investigate the effect of the stiffness ratio, at the macroscopic and microscopic scales, on the behaviour of three systems subjected to quasi-static shearing. These three systems are made of sphere, oblate and prolate particles, respectively. We show that, the variation in the contact stiffness ratio affects the micromechanical characteristics of non-sphere particulate systems more dominantly than the sphere particulate systems. Hence, attention must be paid to measure both the normal and tangential contact stiffnesses when characterising non-sphere fine particulates to estimate their assembly strength characteristics during shearing. © 2006 Civil-Comp Press.

Co-authorsRoberto Moreno-Atanasio
2006Antony SJ, Moreno-Atanasio R, Hassanpour A, 'Influence of contact stiffnesses on the micromechanical characteristics of dense particulate systems subjected to shearing', APPLIED PHYSICS LETTERS, 89 (2006) [C1]
DOI10.1063/1.2396894Author URL
CitationsScopus - 9Web of Science - 3
Co-authorsRoberto Moreno-Atanasio
2006Moreno-Atanasio R, Ghadiri M, 'Mechanistic analysis and computer simulation of impact breakage of agglomerates: Effect of surface energy', CHEMICAL ENGINEERING SCIENCE, 61 2476-2481 (2006) [C1]
DOI10.1016/j.ces.2005.11.019Author URL
CitationsScopus - 43Web of Science - 37
Co-authorsRoberto Moreno-Atanasio
2005Moreno-Atanasio R, Antony SJ, Ghadiri M, 'Analysis of flowability of cohesive powders using Distinct Element Method', POWDER TECHNOLOGY, 158 51-57 (2005) [C1]
DOI10.1016/j.powtec.2005.04.029Author URL
CitationsScopus - 19Web of Science - 17
Co-authorsRoberto Moreno-Atanasio
2004Golchert D, Moreno R, Ghadiri M, Litster J, 'Effect of granule morphology on breakage behaviour during compression', POWDER TECHNOLOGY, 143 84-96 (2004) [C1]
DOI10.1016/j.powtec.2004.04.032Author URL
CitationsScopus - 40Web of Science - 43
Co-authorsRoberto Moreno-Atanasio
2004Samimi A, Moreno R, Ghadiri M, 'Analysis of impact damage of agglomerates: effect of impact angle', POWDER TECHNOLOGY, 143 97-109 (2004) [C1]
DOI10.1016/j.powtec.2004.04.027Author URL
CitationsScopus - 27Web of Science - 22
Co-authorsRoberto Moreno-Atanasio
2004Golchert DJ, Moreno R, Ghadiri M, Litster J, Williams R, 'Application of X-ray microtomography to numerical simulations of agglomerate breakage by distinct element method', ADVANCED POWDER TECHNOLOGY, 15 447-457 (2004) [C1]
DOI10.1163/1568552041270554Author URL
CitationsScopus - 6Web of Science - 5
Co-authorsRoberto Moreno-Atanasio
2003Moreno R, Ghadiri M, Antony SJ, 'Effect of the impact angle on the breakage of agglomerates: a numerical study using DEM', POWDER TECHNOLOGY, 130 132-137 (2003) [C1]
DOI10.1016/S0032-5910(02)00256-5Author URL
CitationsScopus - 83Web of Science - 74
Co-authorsRoberto Moreno-Atanasio
Show 29 more journal articles

Conference (17 outputs)

YearCitationAltmetricsLink
2015Gao Y, Wang G, Wanless E, Sathe M, Mitra S, Moreno-Atanasio R, 'Modelling the Motion of a Collected Particle over a Bubble Surface', Procedia Engineering, Beijing (2015)
DOI10.1016/j.proeng.2015.01.266
Co-authorsRoberto Moreno-Atanasio
2014Liyanaarachchi KR, Webber GB, Van Netten K, Moreno-Atanasio R, Galvin KP, 'Selective collection of fine particles by water drops', Advanced Powder Technology (2014)

This study was concerned with the interaction between a gaseous dispersion of fine particles travelling in the horizontal direction and discrete drops of water falling vertically through the dispersion. A simple analytical model of the particle-drop collision was developed to describe the particle recovery by the drops as a function of the water flux, covering two extremes of relative velocity between the particles and drops. The Discrete Element Method was used to validate the analytical model. Further validation of the model and insights were obtained through experimental studies. The physical process of wetting was observed to be important in influencing the tendency of particles to become engulfed by the drops of water, or to either adhere to the drops or by-pass the drops altogether. Hydrophilic particles were readily engulfed while hydrophobic particles, at best, adhered to the surface of the drop, or failed to attach. Moreover, the recovery of the hydrophilic silica particles was significantly higher than the recovery of hydrophobic coal particles, with the selectivity ratio approximately 1.5. Spherical ballotini particles were the most sensitive, with a notable increase in recovery when cleaned, and evidence of increased recovery with increasing particle size. The recovery of irregular shaped silica flour particles, however, was largely independent of the particle size. A similar result was observed for irregular coal particles, though the recoveries were all lower than relatively more hydrophilic ballotini or silica flour.

DOI10.1016/j.apt.2014.03.009
Co-authorsRoberto Moreno-Atanasio, Kevin Galvin, Grant Webber
2013Van Netten K, Moreno-Atanasio R, Galvin KP, 'Enhanced Recovery of Fine Coal Particles using a Modified Oil Agglomeration Process', Australiasian Particle Technology Scoiety Student Conference 2013, Sunshine Coast, Australia (2013) [E3]
Co-authorsKevin Galvin, Roberto Moreno-Atanasio
2013Moreno-Atanasio R, Dobbie L, Evans G, 'Selective capture of binary mixtures of particles by a central bubble: A discrete element method study', Chemeca 2013, Brisbane, Australia (2013) [E1]
Author URL
Co-authorsGeoffrey Evans, Roberto Moreno-Atanasio
2013Gao Y, Evans G, Wanless E, Moreno-Atanasio R, 'Effect of the hydrophobic force strength on particle-bubble collision kinetics: A DEM approach', Chemeca 2013, Brisbane, Australia (2013) [E1]
Author URL
Co-authorsGeoffrey Evans, Roberto Moreno-Atanasio, Erica Wanless
2013Van-Netten K, Moreno-Atanasio R, Galvin KP, 'Preparation of Coal Agglomerates using a Water-in-Oil Emulsion', Chemeca 2013, Brisbane, Australia (2013) [E1]
Co-authorsKevin Galvin, Roberto Moreno-Atanasio
2012Liyanaarachchi KR, Webber GB, Galvin KP, 'Selective collection of fine particles by water drops', 2012 AIChE Annual Meeting, Pittsburgh, Pennsylvania (2012) [E3]
Co-authorsKevin Galvin, Grant Webber, Roberto Moreno-Atanasio
2012Maxwell RK, Ata S, Wanless EJ, Moreno-Atanasio R, 'Computer simulations of particle-bubble interactions using Discrete Element Method', Chemeca 2012 : Quality of Life Through Chemical Engineering, Wellington, NZ (2012) [E1]
Co-authorsErica Wanless, Seher Ata, Roberto Moreno-Atanasio
2012Neville FC, Moreno-Atanasio R, 'Magnetic interactions of core-shell composite particles: A combined experimental and simulation approach', Chemeca 2012 : Quality of life through chemical engineering, Wellington, NZ (2012) [E1]
Co-authorsFrances Neville, Roberto Moreno-Atanasio
2011Webber GB, MacPherson SA, Moreno-Atanasio R, 'The kinetics of colloidal aggregation - Effect of bimodal Hamaker constant distribution and Brownian forces', Abstract Booklet. UK Colloids 2011: An international Colloid & Surface Science Symposium, Canary Wharf, London, United Kingdom (2011) [E3]
Co-authorsGrant Webber, Roberto Moreno-Atanasio
2011MacPherson SA, Webber GB, Moreno-Atanasio R, 'The kinetics of colloidal aggregation: Influence of the van der Waals forces', Chemeca 2011: Engineering a Better World, Sydney (2011) [E1]
Co-authorsRoberto Moreno-Atanasio, Grant Webber
2009Moreno-Atanasio R, 'Energy dissipation on agglomerates during impact', CHEMECA 2009: Engineering Our Future: Are We Up to the Challenge?: CD with Proceedings, Perth, WA (2009) [E1]
Co-authorsRoberto Moreno-Atanasio
2005Bose K, Moreno-Atanasio R, Antony SJ, Ding Y, Biggs SR, Ghadiri M, 'Direct measurement of the effect of adhesion on powder flow behavior experimental and DEM investigations', Powders and Grains 2005, Stuttgart, Germany (2005) [E1]
Co-authorsRoberto Moreno-Atanasio
2005Moreno-Atanasio R, Xu BH, Ghadiri M, 'Effect of contact stiffness on the fluidization behaviour of cohesive powders', Powders and grains 2005 : proceedings of the 5th International Conference on Micromechanics of Granular Media, Stuttgart, Stuttgart, Germany (2005) [E1]
Co-authorsRoberto Moreno-Atanasio
2005Moreno R, Xu BH, Ghadiri M, 'Effect of contact stiffness on the fluidization behavior of cohesive powders', Powders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media (2005) [E1]

In this work the effect of contact stiffness and surface energy on fluidization behavior of cohesive powders is analysed using a combined continuum and discrete model (CCDM). Four batches of particles with different combinations of contact stiffness (50 N/m and 50000 N/m) and surface energy (0.37 mJ/m 2 and 3.7 mJ/m 2) were studied. The analysis has been carried out in terms of the number of interparticle contacts, average contact forces and deformations. The simulation results indicate that for low values of surface energy (0.37 mJ/m 2) the contact stiffness does not influence appreciably the fluidization behavior. In contrast, for large values of surface energy (3.7 mJ/m 2) the contact stiffness influences the fluidization behavior significantly where poor fluidization occurs for systems with small contact stiffness whilst good fluidization is observed for the system with larger contact stiffness. © 2005 Taylor & Francis Group.

Co-authorsRoberto Moreno-Atanasio
2005Bose K, Moreno R, Antony SJ, Ding Y, Biggs SR, Ghadiri M, et al., 'Direct measurement of the effect of adhesion on powder flow behavior: Experimental and DEM investigations', Powders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media (2005) [E1]

The current study adapts a novel approach to directly measure the effect of particle adhesion on the bulk powder flow characteristics. This is achieved by modifying the adhesion of spherical glass particles (mean size: 38 µm) through a protocol that involves the deposition of surface silane monolayers on individual glass particles. The increase in particle surface energy has been characterized by particle-particle pull off force measurements using Atomic Force Microscopy. An annular shear cell has been used to measure flow properties and to quantify the effect of surface energy of the silanized glass particles on their bulk cohesion. Computer simulations using the Distinct Element Method (DEM) have also been carried out. The DEM simulations use JKR adhesion model to incorporate the surface energy values of glass beads corresponding to the AFM pull-off force measurements. The Unconfined Yield Stress (UYS) and Flow Factor (ff) obtained by the simulations have been compared with the experiments. © 2005 Taylor & Francis Group.

CitationsScopus - 2
Co-authorsRoberto Moreno-Atanasio
2001Ghadiri M, Antony SJ, Moreno R, Ning Z, 'Granular powders and solids: Insights from numerical simulations', POWDERS AND SOLIDS: DEVELOPMENTS IN HANDLING AND PROCESSING TECHNOLOGIES, UNIV MANCHESTER, INST SCI & TECHNOL, MANCHESTER, ENGLAND (2001)
DOI10.1039/9781847551733-00070Author URL
Co-authorsRoberto Moreno-Atanasio
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Grants and Funding

Summary

Number of grants11
Total funding$1,820,180

Click on a grant title below to expand the full details for that specific grant.


20133 grants / $322,854

Fine Particle Beneficiation through Agglomeration with a Novel Binder$217,954

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamLaureate Professor Kevin Galvin, Doctor Roberto Moreno-Atanasio, Mr Thomas Wilson
SchemeLinkage Projects
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1201113
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

A Generalized Model of the Reflux Classifier using computer simulations based on the Discrete Element Method (DEM)$103,700

Funding body: Australian Coal Research Limited

Funding bodyAustralian Coal Research Limited
Project TeamLaureate Professor Kevin Galvin, Doctor Roberto Moreno-Atanasio
SchemeAustralian Coal Association Research Program (ACARP)
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1201234
Type Of FundingAust Competitive - Non Commonwealth
Category1NS
UONY

Chemeca 2013, Brisbane, 29 September - 2 October 2013$1,200

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Roberto Moreno-Atanasio
SchemeTravel Grant
RoleLead
Funding Start2013
Funding Finish2013
GNoG1301033
Type Of FundingInternal
CategoryINTE
UONY

20125 grants / $1,462,200

A facility for non-destructive quantification of coal structures, composition and percolation fluid flows in energy and environmental applications$885,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project Team
SchemeLinkage Infrastructure Equipment & Facilities (LIEF) Partner funding
RoleInvestigator
Funding Start2012
Funding Finish2015
GNo
Type Of FundingNot Known
CategoryUNKN
UONY

3D Gamma Ray Tomography for Multiphase Flow Characterization$521,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project Team
SchemeLinkage Infrastructure Equipment & Facilities (LIEF) Partner funding
RoleInvestigator
Funding Start2012
Funding Finish2017
GNo
Type Of FundingNot Known
CategoryUNKN
UONY

A facility for non-destructive quantification of coal structures, composition and percolation fluid flows in energy and environmental applications$35,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamProfessor Anh Nguyen, Professor Victor Rudolph, Professor Suresh Bhatia, Professor John Zhu, Dr Simon Smart, Professor Dongke Zhang, Professor Hui Tong Chua, Doctor Roberto Moreno-Atanasio, Professor Geoffrey Evans, Laureate Professor Kevin Galvin, Laureate Professor Graeme Jameson, Professor Behdad Moghtaderi, Associate Professor Qin Li, Dr Shaobin Wang, Dr Chi Phan, Associate Professor Shaomin Liu
SchemeEquipment Grant
RoleLead
Funding Start2012
Funding Finish2012
GNoG1100623
Type Of FundingInternal
CategoryINTE
UONY

3D Gamma Ray Tomography for Multiphase Flow Characterisation$20,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDr Vishnu Pareek, Professor Geoffrey Evans, Doctor Elham Doroodchi, Doctor Roberto Moreno-Atanasio, Laureate Professor Graeme Jameson
SchemeEquipment Grant
RoleInvestigator
Funding Start2012
Funding Finish2012
GNoG1100626
Type Of FundingInternal
CategoryINTE
UONY

Chemeca 2012, Wellington NZ, 23-26 September 2012$1,200

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Roberto Moreno-Atanasio
SchemeTravel Grant
RoleLead
Funding Start2012
Funding Finish2012
GNoG1200990
Type Of FundingInternal
CategoryINTE
UONY

20111 grants / $1,200

Chemeca 2011, Hilton Sydney, 18 - 21 September 2011$1,200

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Roberto Moreno-Atanasio
SchemeTravel Grant
RoleLead
Funding Start2011
Funding Finish2011
GNoG1100740
Type Of FundingInternal
CategoryINTE
UONY

20101 grants / $28,926

A new combined Atomic Force Microscopy and computer-simulation approach for improved modelling of particulate solids behaviour $28,926

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Roberto Moreno-Atanasio, Doctor Grant Webber
SchemePilot Grant
RoleInvestigator
Funding Start2010
Funding Finish2010
GNoG0900065
Type Of FundingInternal
CategoryINTE
UONY

20091 grants / $5,000

New Staff Grant 2009$5,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Roberto Moreno-Atanasio
SchemeNew Staff Grant
RoleLead
Funding Start2009
Funding Finish2009
GNoG0190548
Type Of FundingInternal
CategoryINTE
UONY
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Research Supervision

Current Supervision

CommencedResearch Title / Program / Supervisor Type
2015Influence of Energy Dissipation on Mineral Flotation Recovery
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Catalytic Nitration
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2014Optimisation of Silica Particle Fabrication and their Surface Properties Through Novel Synthesis Routes
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2014Modelling Composition Kinetics of Algal Biomass
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Computer Simulation of Particle-Bubble Interactions Using Discrete Element Method
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Synthesis and Simulation of Anti-Fouling Particles for Fresh and Marine Water Purification Systems
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2014Material Type and Voidage Distribution in a Sintering Bed
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2013A continuum model for the Reflux Classifier
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2013Fabrication and Modelling of Core-Shell Composite Particles
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2012Maximising Binder Functionality in Selective Agglomeration
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
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Dr Roberto Moreno-Atanasio

Position

Lecturer
Centre for Advanced Particle Processing and Transport
School of Engineering
Faculty of Engineering and Built Environment

Focus area

Chemical Engineering

Contact Details

Emailroberto.moreno-atanasio@newcastle.edu.au
Phone(02) 403 39064
Fax(02) 403 39095

Office

RoomA305, Nier - A Block
BuildingNewcastle Institute for Energy and Resources
LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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