Dr Johan Heyns

Dr Johan Heyns is a senior researcher at the CSIR Aeronatic Systems research group.

Research experience and interests:

Dr Heyns specialises in numerical flow modelling and simulation of aerospace related projects using the OpenFOAM CFD toolset is. Main areas of interest include:
– Liquid fuel sloshing (Multiphase flow)
– External aerodynamics (Sub-, trans- and supersonic flow)

Career background:

Dr Heyns has been involved in the development of specialised Computational Fluid Dynamics (CFD) solvers at the CSIR for the past six years.

Detailed qualifications:

PhD, Mechanical Engineering (University of Stellenbosch)

MSc, Mechanical Engineering (University of Stellenbosch)

BEng, Mechanical (University of Pretoria)

Published research:

Research Space profile

Journal papers:

• A weakly compressible free-surface flow solver for liquid-gas systems using the volume-of-fluid approach, J.A. Heyns, A.G.Malan, T. Harms and O.F. Oxtoby. Journal of Computational Physics (2013)
• Development of a compressive surface capturing formulation for modelling free-surface flow using the volume-of-fluid approach. J.A. Heyns, A.G. Malan, T. Harms and O.F. Oxtoby, International Journal for Numerical Methods in Fluids (2012)
• Experimental investigation into the thermal-flow performance characteristics of an evaporative cooler, J.A. Heyns and D.G. Kröger, Applied Thermal Engineering (2009)
• Performance characteristics of an air-cooled steam condenser with hybrid dephlegmator, J.A. Heyns and D.G. Kröger, R&D Journal (2012)

Conference papers:

• Modelling surface tension dominated flows using the VOF approach,  J.A. Heyns and O.F. Oxtoby, 6^th European Conference on Computational Fluid Mechanics, Barcelona, Spain, 20-25 July 2014
• Modelling high-speed flow using a matrix-free coupled solver,  J.A. Heyns, O.F. Oxtoby and A. Steenkamp, 9th International OpenFOAM Workshop, Zagreb, Croatia, 23-26 June 2014
• Modelling dynamic liquid-gas systems: Extensions to the volume-of-fluid solver, J.A. Heyns, O.F. Oxtoby and R. Suliman, 8th International OpenFOAM Workshop, Jeju, Korea, 11-14 June 2013
• Weakly compressible formulation for modeling liquid-gas sloshing, J.A. Heyns, O.F. Oxtoby and A.G. Malan, 6^th European Congress on Computational Methods in Applied Sciences and Engineering, Vienna, Austria, 10-14 September 2012

• Extension of liquid-gas free-surface modelling using the VOF approach. J.A. Heyns, O.F. Oxtoby and R Suliman, 8^th South African Conference on Computational Mechanics, Johannesburg, South Africa, 3-5 September 2012
• Free-surface modelling technology for compressible and violent flows. J.A. Heyns, T.M. Harms, and A.G. Malan, 41st AIAA Fluid Dynamics Conference and Exhibit, Honolulu, Hawaii, 27-30 June 2011.
• Free surface modelling technology for compressible and violent flows. J. A. Heyns, A. G. Malan and O. F. Oxtoby. Second International African Conference on Computational Mechanics, Cape Town, South Africa, 5 to 8 January 2011.
• Thermal-flow performance characteristics of an air-cooled steam condenser incorporating a hybrid (dry/wet) dephlegmator, J.A. Heyns and D.G Kröger, 14th IAHR Cooling Tower and Air-cooled Heat Exchanger Conference, 2009