Author:Gledhill, Irvy MA; Nordström, JDate:Sep 2010Fifth-generation missiles accelerate up to 100 g in turns, and higher accelerations are expected as agility increases. The auhtors have developed the theory of aerodynamics for arbitrary accelerations, and have validated modelling in a ...Read more
Author:Gledhill, Irvy MA; Nordstrom, JDate:Sep 2010Fifth-generation missilies accelerate up to 100 g in turns, and higher accelerations are expected as agility increases. The authors have developed the theory of aerodynamics for arbitrary accelerations, and have validated modelling in a ...Read more
Author:Tamsaout, T; Kheloufi, K; Amara, EH; Arthur, Nana KK; Pityana, Sisa LDate:Nov 2017A theoretical approach based on a numerical simulation using experimental data is proposed as a contribution to the study of laser-based additive manufacturing by direct energy deposition (DED). The aim is to simulate the stages of layer-by-layer ...Read more
Author:Mbanjwa, MB; Land, KDate:Mar 2008The computational fluid dynamics (CFD) simulation results of a capillary-driven flow in a 100 µm serpentine flow-field are presented. A two-dimensional (2D) numerical model based on a conservative level set method (LSM) was developed and ...Read more
Author:Dedekind, MO; Harris, LEDate:03 Jan 1996A case study of certain gas turbine stator vanes which fail prematurely is presented, with a view to determining whether operational procedure might have caused the failures. The engines had been operated from a ‘hot-and-high’ environment, ...Read more
Author:Mbanjwa, MB; Land, K; Jewell, LL; Gledhill, Irvy MADate:Jan 2011The production of water-in-oil (w/o) emulsions in T-junction microfluidic channels was studied through experiments and computational fluid dynamics (CFD). W/o emulsions were produced in the microchannels from deionised water and mineral oil. ...Read more
Author:Dunn, Dwain I; Snedden, Glen C; Von Backström, TWDate:Jan 2010Turbine manufacturers are striving to develop turbines that are more efficient. One area of focus has been the control of secondary flows through the use of non-axisymmetric endwalls. The majority of development has been performed in cascades ...Read more
Author:Vallabh, Bhavya; Skews, BWDate:Sep 2017The existing nozzle contour profiles of the CSIR’s supersonic or High Speed Wind Tunnel (HSWT) produce weak waves in the test section region, which effectively degrades the air flow quality in the test section. This paper describes a calculation ...Read more
Author:Grobler, Jan-Hendrik; de Villiers, R; Cooper, Antony KDate:Jan 2010A method is proposed for the modelling of fluid-solid interaction in applications where fluid forces dominate. Data are transferred between two stand-alone codes: a dedicated computational fluid dynamics (CFD) code capable of free surface ...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: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:Snedden, Glen C; Dunn, Dwain I; Von Backström, TW; Ingram, GDate:Jan 2010This study examines the results of a CFD and rotating experiment, comparing an annular and a generic end wall design for a model turbine rotor in a 1½ stage turbine at the CSIR, in an attempt to draw some conclusions regarding the proper ...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:Meyers, BC; Mahmood, GI; Meyers, Bronwyn CDate:Nov 2009Due to CFD Shortfalls, experimental data on gas turbine combustors is required to obtain insight into the combustion and flow mechanisms as well as for simulation and model validation and evaluation. The temperature and velocity fields of a ...Read more
Author:Conradie, Dirk CU; Kumirai, TDate:Jun 2012During the course of 2009 and 2010 the building performance laboratory (BPL) of South Africa's Council for Scientific and Industrial Research (CSIR) undertook predictive simulations to quantifiy the expected performance of an advanced new ...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
Author:Rawal, A; Gonsalves, JWDate:2006The present work deals with the net structures, which are produced by replacing the static die (spinneret) with two concentric dies rotating in opposite directions in a melt extrusion process. These dies consist of defined number of slots ...Read more