Dr Tobias Krull

Dr Tobias Krull

Conjoint Lecturer

School of Engineering

Career Summary

Biography

Before moving to Australia, I graduated with a Dipl-Ing Degree (MEng equivalent), specialising in Mechanical and Process Engineering, from the Technical University of Braunschweig (Germany) in 2001 which culminated with my final year project which I undertook at the Key Centre for Bulk Solids and Particulate Technologies at the University of Newcastle in late 2000.  I subsequently commenced a PhD degree within the same Centre in the field of Pneumatic Conveying, focusing on Dense Phase Conveying of Granular Materials.  In 2005 I completed my PhD and started my career at The University of Newcastle Research Associates (TUNRA) and have since been involved in over 1000 projects across many different facets of bulk materials handling covering materials characterisation, contract R&D, equipment troubleshooting, problem solving, conceptual equipment design, expert witness reports and plant audits for many major mining and engineering companies in Australia and internationally.  My current role of General Manager of TUNRA Bulk Solids still has a strong focus on Engineering and Research and I am still involved in projects on a day to day basis.

Whilst the focus of my career has been on the interaction with industrial clients and the translation of research outcomes into industry relevant solutions, I have at the same time also published and co-authored numerous conference and journal papers in these subject areas.  I am also very active in the presentation of professional development courses in the field of bulk materials handling to industrial audiences both in Australia and overseas, and have been involved in more than 5 courses per year on average, covering technical aspects of general bulk materials handling, flow properties, modelling and feeding.

Other skills and principal research contributions to the field worth noting include the development of instrumentation to measure lateral pressures and friction within pneumatically conveyed materials and the development of a patented ship-loading chute to minimise dust emissions.


Qualifications

  • Doctor of Philosophy, University of Newcastle

Keywords

  • bulk materials handling
  • conveying
  • feeders
  • hoppers
  • mechanical engineering
  • pneumatic conveying
  • storage and flow

Languages

  • English (Fluent)
  • German (Fluent)

Fields of Research

Code Description Percentage
091499 Resources Engineering and Extractive Metallurgy not elsewhere classified 50
091399 Mechanical Engineering not elsewhere classified 20
091599 Interdisciplinary Engineering not elsewhere classified 30

Professional Experience

Academic appointment

Dates Title Organisation / Department
4/04/2016 - 31/12/2017 Conjoint Lecturer Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Australia

Professional appointment

Dates Title Organisation / Department
1/03/2013 -  General Manager TUNRA Bulk Solids
1/12/2006 - 28/02/2013 Operations Manager TUNRA Bulk Solids
21/02/2005 - 30/11/2006 Senior Mechanical Engineer TUNRA Bulk Solids

Awards

Award

Year Award
2010 A.W. Roberts Award (Engineers Australia) for significant contributions in bulk solids handling
Australian Society for Bulk Solids Handling
Edit

Publications

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


Journal article (7 outputs)

Year Citation Altmetrics Link
2014 Roberts AW, Krull T, Williams KC, 'Load stability of bulk cargoes during ship transport', Bulk Solids Handling, 34 50-57 (2014) [C2]

The safe ocean transport of bulk cargoes on large bulk ships is vitally dependent on the stability of the cargo under the influence of the rolling pitching and yawing motion of th... [more]

The safe ocean transport of bulk cargoes on large bulk ships is vitally dependent on the stability of the cargo under the influence of the rolling pitching and yawing motion of the ship and the transmission of vibration from the ship's engine and propulsion machinery as well as wave motion induced whipping. Safety standards for ship transport are set by such bodies as the International Maritime Organisation with recommended tests for the assessment of bulk ores deemed suitable for safe ship transport. These test procedures are somewhat empirical and take no account of the well established and proven flow property tests, analysis and design methodologies widely accepted in field of bulk solids handling. These matters are discussed in this article. The stress states in loaded bulk cargoes are examined with respect to the establishment of maximum limits for surface rill angles as a function of a ship's roll angles.

Co-authors Alan Roberts, Ken Williams
2008 Tan S, Williams KC, Jones MG, Krull T, 'Determination of slug permeability factor for pressure drop prediction of slug flow pneumatic conveying', Particuology, 6 307-315 (2008) [C1]
DOI 10.1016/j.partic.2008.05.001
Citations Scopus - 10Web of Science - 5
Co-authors Mark Jones, Ken Williams
2008 Wiche SJ, Wheeler CA, Krull T, Roberts AW, Ilic D, 'Dust generation during shiploading: Reducing emissions from ship holds', Bulk Solids Handling, 28 542-551 (2008) [C2]
Co-authors Alan Roberts, Dusan Ilic, Craig Wheeler
2007 Wheeler CA, Krull T, Roberts AW, Wiche SJ, 'Design of ship loading chutes to reduce dust emissions', Process Safety Progress, 26 229-234 (2007) [C1]
DOI 10.1002/prs.10180
Citations Scopus - 4Web of Science - 2
Co-authors Alan Roberts, Craig Wheeler
2007 Tan S, Williams KC, Jones MG, Krull T, 'Modelling the discontinuous-transient behaviour of slug flow in pneumatic conveying', Bulk Solids & Powder Science & Technology, 2 106-117 (2007) [C1]
Co-authors Mark Jones, Ken Williams
2004 Krull T, Jones MG, Keys S, 'Stress-field modeling and pressure drop prediction for slug-flow pneumatic conveying in an aerated radial stress chamber', Particulate Science and Technology, 22 129-138 (2004) [C1]
DOI 10.1080/02726350490456160
Citations Scopus - 5Web of Science - 6
Co-authors Mark Jones
2003 Krull T, Jones MG, Roberts AW, Wypych PW, 'Measurement of the Stress Transmission Coefficient of Material Slugs in an Aerated Radial Stress Chamber', Particulate Science & Technology, 21 327-341 (2003) [C1]
DOI 10.1080/02726350390240189
Citations Web of Science - 1
Co-authors Mark Jones, Alan Roberts
Show 4 more journal articles

Conference (17 outputs)

Year Citation Altmetrics Link
2015 Williams K, Honeyands TA, Holmes R, Orense R, Roberts A, Pender M, McCallum D, 'Maritime Bulk Cargo Transportable Moisture Limit Requirements for Iron Ore Shipments', Iron Ore 2015: Maximising Productivity. Proceedings (2015) [E1]
Co-authors Tom A Honeyands, Alan Roberts, Ken Williams
2013 Donohue T, Ilic D, Krull T, 'Modelling of iron ore in materials handling applications with a focus on wear', Proceedings Iron Ore 2013 (2013)
Co-authors Timothy Donohue, Dusan Ilic
2011 Roberts AW, Jones MG, Wheeler CA, Wiche SJ, Krull T, 'Optimising the design of large scale storage, load-out and conveying facilities - An Australian perspective', Materials Handling Engineers Association 2011 Bulk Handling Conference (2011) [E2]
Co-authors Alan Roberts, Craig Wheeler, Mark Jones
2008 Wiche SJ, Wheeler CA, Krull T, Roberts AW, Ilic D, 'Reducing dust emissions from ship holds during loading of bulk solids', International Conference on Storing, Handling and Transporting Bulk (2008) [E1]
Co-authors Alan Roberts, Dusan Ilic, Craig Wheeler
2008 Krull T, Williams KC, Hotte S, Jones MG, 'Investigation of the air gap and slug length ratio in slug flow pneumatic conveying', International Symposium Reliable Flow of Particulate Solids IV (RELPOWFLO IV): Proceedings (2008) [E1]
Co-authors Ken Williams, Mark Jones
2007 Tan S, Williams KC, Jones MG, Krull T, 'Experimental verification of pressure drop prediction for slug-flow pneumatic conveying', 2007 International Symposium on Pneumatic Conveying Technologies. Proceedings (2007) [E1]
Co-authors Mark Jones, Ken Williams
2007 Roberts AW, Wiche SJ, Krull T, 'Review of rathole determination in relation to draw-down and live capacity of gravity reclaim stockpiles', ICBMH 2007. 9th International Conference on Bulk Materials Handling Storage, Handling and Transportation. Proceedings (2007) [E1]
Citations Scopus - 1
Co-authors Alan Roberts
2007 Tan S, Williams KC, Jones MG, Krull T, 'Simulation of transient single slug behaviour in pneumatic conveying', ICBMH 2007. 9th International Conference on Bulk Materials Handling Storage, Handling and Transportation. Proceedings (2007) [E1]
Citations Scopus - 1
Co-authors Ken Williams, Mark Jones
2006 Wheeler C, Krull T, Roberts A, Wiche S, 'Reducing dust emissions from grain handling ship loaders', 40th Annual Loss Prevention Symposium 2006, Held at the 2006 AIChE Spring National Meeting (2006)

This paper presents an industrial case study to reduce dust emissions from a grain handling ship loader. The primary objective of the study was to reduce dust emissions to within ... [more]

This paper presents an industrial case study to reduce dust emissions from a grain handling ship loader. The primary objective of the study was to reduce dust emissions to within acceptable environmental levels during ship loading. Several constraints were imposed on the solution due to time and budgetary restrictions, and the inability to add a dust suppression agent to the grain for quality reasons. A number of alternative loading chute configurations and delivery spoon profiles were examined in a pilot-scale test facility. This paper will discuss a number of alternative solutions which were investigated during the course of the study and the critical parameters of the final design. Tests showed that it was not beneficial to decelerate the product stream to keep the relative velocity of the air stream over the grain below the minimum pickup velocity. Instead, it was found that concentrating the product stream and keeping the product velocity high was more beneficial in reducing dust emissions. A reduction of 50% in dust emission was achieved through the use of specifically designed constant radius and parabolic profile loading spoons. The product stream exiting the curved spoons was found to be concentrated and stream-lined, resulting in the dust being contained within the product stream.

Citations Scopus - 2
Co-authors Craig Wheeler
2006 Krull T, Jones MG, Roberts AW, 'Measurement of Wall Friction in Slug Flow Pneumatic Conveying', CHoPS-05, 2006 Conference Proceedings CD-Rom (2006) [E2]
Co-authors Mark Jones, Alan Roberts
2006 Wheeler CA, Krull T, Roberts AW, Wiche SJ, 'Reducing Dust Emissions from Grain Handling Ship Loaders', Proceedings of The Fifth World Congress on Particle Technology CD-Rom (2006) [E2]
Co-authors Craig Wheeler, Alan Roberts
2005 Krull T, Jones MG, Roberts AW, 'Dynamic measurement of critical flow parameters for slug flow pneumatic conveying', Particulate Systems Analysis 2005 (CD Rom) (2005) [E2]
Co-authors Alan Roberts, Mark Jones
2004 Krull T, Jones MG, Roberts AW, Wypych P, Hastie D, 'Stress field measurements in slug flow pneumatic conveying', Conference Paper (2004) [E1]
Co-authors Mark Jones, Alan Roberts
2004 Jones MG, Krull T, 'Measurements of the stress-field within slugs under dynamic conditions in a pneumatic conveying pipeline', Conference Paper (2004) [E1]
Co-authors Mark Jones
2003 Krull T, Keys S, Jones MG, 'Strees-field modelling and pressure drop prediction for slug-flow pneumatic conveying in an aerated radial stress chamber', The 4th International Conference for Conveying and Handling of Particulate Solids (2003) [E2]
Co-authors Mark Jones
2002 Krull T, Keys S, Jones MG, 'Simulation of the stress-field within slugs in an aerated radial stress chamber', Pneumatic and Hydraulic Conveying Systems III (2002) [E3]
Co-authors Mark Jones
2002 Jones MG, Zhang X, Krull T, Pan R, 'Bypass systems in pneumatic conveying', 15th International Conference on Hydrotransport Incorporatig the 11th International Symposium of Freight Pipelines Volume I (2002) [E1]
Co-authors Mark Jones
Show 14 more conferences

Patent (1 outputs)

Year Citation Altmetrics Link
2007 roberts AW, krull T, wiche S, Wheeler CA, Dust reduction in delivery of particulate commodities (2007)
Co-authors Craig Wheeler, Alan Roberts

Thesis / Dissertation (1 outputs)

Year Citation Altmetrics Link
2005 Krull T, SLUG FLOW PNEUMATIC CONVEYING: STRESS FIELD ANALYSIS AND PRESSURE DROP PREDICTION, The University of Newcastle (2005)
Edit

Grants and Funding

Summary

Number of grants 3
Total funding $825,636

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


20151 grants / $162,501

AMIRA Project P1150 - Moisture Measurement and Control for Iron Ore Conveyor Systems$162,501

Funding body: AMIRA International Limited

Funding body AMIRA International Limited
Project Team Doctor Kenneth Williams, Doctor Wei Chen, Associate Professor Craig Wheeler, Emeritus Professor Alan Roberts, Prof MARK Jones, Doctor Tobias Krull
Scheme Research Project
Role Investigator
Funding Start 2015
Funding Finish 2017
GNo G1500712
Type Of Funding Grant - Aust Non Government
Category 3AFG
UON Y

20141 grants / $277,135

Transportable Moisture Limit of Coal Bulk Cargoes$277,135

Funding body: Australian Coal Research Limited

Funding body Australian Coal Research Limited
Project Team Doctor Kenneth Williams, Emeritus Professor Alan Roberts, Associate Professor Tristan Perez, Associate Professor Craig Wheeler, Professor Mark Jones, Doctor Tobias Krull, Doctor Dusan Ilic
Scheme Australian Coal Association Research Program (ACARP)
Role Investigator
Funding Start 2014
Funding Finish 2014
GNo G1301436
Type Of Funding Aust Competitive - Non Commonwealth
Category 1NS
UON Y

20121 grants / $386,000

A Systematic Evaluation of Transportable Moisture Limit Measurement Methods for Iron Ore Bulk Cargoes$386,000

Funding body: AMIRA International Limited

Funding body AMIRA International Limited
Project Team Doctor Kenneth Williams, Doctor Tobias Krull, Emeritus Professor Alan Roberts, Associate Professor Tristan Perez, Professor Mark Jones, Associate Professor Craig Wheeler
Scheme Research Project
Role Investigator
Funding Start 2012
Funding Finish 2014
GNo G1200568
Type Of Funding Grant - Aust Non Government
Category 3AFG
UON Y
Edit

Dr Tobias Krull

Position

Conjoint Lecturer
Centre for Bulk Solids and Particulate Technologies
School of Engineering
Faculty of Engineering and Built Environment

Contact Details

Email tobias.krull@newcastle.edu.au
Phone (02) 4033 9015
Fax (02) 4033 9044

Office

Room A712
Building NIER
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
Edit