Author:Bogaers, Alfred EJ; Jansen van Rensburg, GJDate:Sep 2018In this paper we investigate different numerical techniques to approximate and model gas dispersion, with a primary focus on modelling the buoyancy effects of dense gasses. We compare the popular Gaussian dispersion model with three different ...Read more
Author:Nice, Jako A; Kumirai, Tichaona; Conradie, Dirk CU; Grobler, Jan-HendrikDate:Dec 2015The impact of Tuberculosis (TB) is of epidemic proportions in South Africa (SA) being one of the developing countries. Furthermore, studies seem to indicate that health care facilities are contributing to the spread of Mtb (Eshun-Wilson et ...Read more
Author:Naidoo, Kavendra; Skews, BWDate:Jul 2007This paper reports the development of an experimental facility for the investigation of dynamic, two-dimensional shock reflection phenomena generated by a rapidly pitching wedge in proximity of an ideal wall. CFD simulations of the rapidly ...Read more
Author:Snedden, Glen C; Roos, TH; Naidoo, KavendraDate:Sep 2003Previous simulations of a turbojet disc cavity with full Navier-Stokes CFD and simplified geometry and boundary conditions have been improved to reduce the level of approximation. A new grid was built using a multi-block approach. The case ...Read more
Author:Robbins, SL; Heyns, PS; Heyns, Johan ADate:May 2020The majority of condition monitoring techniques employed today consider the acquisitioning and analysis of structural responses as a means of profiling machine condition and performing fault detection. Modern research and newer technologies ...Read more
Author:Gledhill, Irvy MA; Forsberg, K; Eliasson, P; Baloyi, J; Nordström, JDate:2009In this paper the authors describe the implementation and validation of arbitrarily moving reference frames in the block-structured CFD-code EURANUS. The paper also present results from calculations on two applications involving accelerating ...Read more
Author:MacLucas, David A; Gledhill, Irvy MADate:Jul 2014Computational Fluid Dynamics is routinely used in clearance of stores for carriage and release from aircraft in the transonic range of flight. A well-known validation case is modelled in this study, for which aerodynamic loads have been ...Read more
Author:Cannoo, BR; Gledhill, Irvy MA; Cooper, Antony K; Greben, JMDate:Mar 2008The protection of coastal structures is important to South Africa. The dynamics of breakwaters is a topic that is becoming amenable to numerical study, in terms of the motion of multiple interlocking structures under wave action. In this ...Read more
Author:Meyers, Bronwyn C; Grobler, Jan-Hendrik; Snedden, GCDate:Sep 2022A combustor was designed for a 200N micro-gas turbine for the model aircraft industry using the NREC design method. Multiple designs resulted which varied in terms of annular area split configuration, hole area splits and relative hole ...Read more
Author:Mbanjwa, MBDate:Oct 2012Droplet-based microfluidic technology has, in recent years, found numerous applications in biology, chemistry, materials synthesis and process engineering applications. Alongside experimental work, numerical tools, such as computational fluid ...Read more
Author:Bergh, J; Snedden, Glen; Dunn, DwainDate:Apr 2020This paper presents the predicted, as well as final experimental results for the design of an automatically optimized non-axisymmetric endwall and as such, attempts to close the loop between design and practice, providing additional information ...Read more
Author:Van Zyl, FJ; Linzer, PDate:Oct 1996In an effort to improve safety in the underground environment of a mechanical miner section, with relation to the methane hazard a data obtained with the multi-channel methane monitoring unit, combined with situ and laboratory coal analysis ...Read more