Particle Technology Group (PTG)

Welcome to

The Particle Technology Group

Our research focuses on the modelling and measurement of complex flows with a strong emphasis on granular systems

PTG FACT file

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Research areas

PEPT

Positron Emission Particle Tracking (PEPT) is a non-invasive 3D imaging technique that tracks the motion of a radio-labelled tracer.

X-RAY

Biplanar X-ray imaging employs two X-ray sources coupled to scintillation screens to monitor the motion of radio-opaque objects. 

DEM/CFD​

Our work allows us to approximate the mechanical environment and discern meaningful data.

SLEEP APNEA

Our research  focuses on mapping out the deformation of the pharyngeal airway during an obstructive sleep apnea episode.

Selected publications

Thomas Pahtz, Orencio Duran, David N. de Klerk, Indresan Govender, and Martin Trulsson (2019). Local rheology relation with variable yield stress ratio across dry, wet, dense, and dilute granular flows. Xiv:1901.04692v1 [cond-mat.soft].

I Govender, MC Richter, AN Mainza, DN De Klerk (2017). A positron emission particle tracking investigation of the scaling laws governing free surface flows in tumbling mills. AIChE, March 2017, 63(3), 903-913

I Govender (2016). Granular flows in rotating drums: A rheological perspective. Minerals Engineering, 92, 168-175

Sherry Bremner, Indresan Govender, Aubrey Mainza (2019). Assymetric dynamics in a horizontally stirred mill using DEM. Minerals Engineering, 134, 232-240

GB Tupper, I Govender, AN Mainza (2017). Predicting flows from the dynamic ergun equation. Minerals Engineering, 103-104, 11-13

GB Tupper, I Govender, DN De Klerk, MC Richter, AN Mainza (2016). Testing of a new dynamic Ergun equation for transport with positron emission particle tracking. AIChE Journal, 62 (3), 939-946

I Govender and T Pathmathas (2017). A positron emission particle tracking investigation of the flow regimes in tumbling mills. J. Phys. D: Appl. Phys. 50, 035601 (10pp)

AJ Morrison, I Govender, AN Mainza, DJ Parker (2016). The shape and behavior of a granular bed in a rotating drum using eulerian flow fields obtained from PEPT. Chemical Engineering Science. 152, 186-198

LS Bbosa, I Govender, A Mainza (2016). Development of a novel methodology to determine mill power draw. International Journal of Mineral Processing, 149, 94-103