Browsing Faculty of Engineering by Author "10199365  Rousseau, Pieter Gerhardus"
Now showing items 115 of 15

Accounting for porous structure in effective thermal conductivity calculations in a pebble bed reactor
Van Antwerpen, W.; Rousseau, P.G.; Du Toit, C.G. (Atomic Energy Society of Japan, 2009)A proper understanding of the mechanisms of heat transfer, flow and pressure drop through a packed bed of spheres is of utmost importance in the design of a high temperature pebble bed reactor. A thorough knowledge of the ... 
Analysis of the porous structure of an annular pebble bed reactor
Du Toit, C.G.; Van Antwerpen, W.; Rousseau, P.G. (Atomic Energy Society of Japan, 2009)This paper discusses the numerical analysis of the porous structure of an annular packed bed. Numerical procedures are described to determine the variation in the porosity, the variation in the coordination number (measure ... 
Codetocode comparison for analysing the steadystate heat transferand natural circulation in an aircooled RCCS using GAMMA+ and Flownex
Rousseau, P.G.; Du Toit, C.G.; Jun, J.S.; Noh, J.M. (Elsevier, 2015)The GAMMA+ and Flownex codes are both based on a onedimensional flow network modelling approach and both can account for any complex network of different heat transfer phenomena occurring simultaneously. However, there ... 
The extraction of the temperature gradient from measured temperature profiles with uncertainty propagation, as applied to the high temperature test unit
Van Antwerpen, H.J.; Rousseau, P.G.; Du Toit, C.G. (SAAM, 2010)This paper highlights the usefulness of applying analytical methods for uncertainty analysis to a leastsquares polynomial fit. It also presents an equation to calculate the confidence interval in the slope of a regression ... 
The flow and heat transfer in a packed bed high temperature gascooled reactor
Du Toit, C.G.; Rousseau, P.G. (ASME, 2010)Engineers are faced with two major challenges when carrying out the thermalfluid design of a complex system consisting of many interacting components such as the PBMR power plant. The first challenge is to predict the ... 
Formulation of a unit cell for a thermalhydraulic systems model of a prismatic fuel block of a high temperature gascooled reactor
Khoza, S.N.; Du Toit, C.G.; Rousseau, P.G. (SACAM, 2016) 
Introduction to the PBMR heat transfer test facility
Rousseau, P.G.; Van Staden, M. (Elsevier, 2008)This paper provides an introduction to the Heat Transfer Test Facility (HTTF) that is currently being developed for PBMR (Pty.) Ltd. by MTech Industrial (Pty.) Ltd. in association with NorthWest University in South Africa. ... 
A methodology to investigate the contribution of conduction and radiation heat transfer to the effective thermal conductivity of packed graphite pebble beds, including the wall effect
De Beer, M.; Du Toit, C.G.; Rousseau, P.G. (Elsevier, 2017)The effective thermal conductivity represents the overall heat transfer characteristics of a packed bed of spheres and must be considered in the analysis and design of pebble bed gascooled reactors. During depressurized ... 
Modeling the flow and heat transfer in a packed bed high temperature gascooled reactor in the context of a systems CFD approach
Du Toit, C.G.; Rousseau, P.G. (ASME, 2012)ABSTRACT Engineers are faced with two major challenges when carrying out the thermalfluid design of a complex system consisting of many interacting components. The first challenge is to predict the performance of all the ... 
Multi–Sphere Unit Cell model to calculate the effective thermal conductivity in packed pebble beds of mono–sized spheres
Van Antwerpen, W.; Rousseau, P.G.; Du Toit, C.G. (Elsevier, 2012)This paper presents a new approach to the calculation of the effective thermal conductivity in packed pebble bed reactors, namely the Multisphere Unit Cell model. The model specifically accounts for the porous structure, ... 
Separate effects tests to determine the effective thermal conductivityin the PBMR HTTU test facility
Rousseau, P.G.; Du Toit, C.G.; Van Antwerpen, W.; Van Antwerpen, H.J. (Elsevier, 2014)Thermalfluid simulations are used extensively to predict the maximum fuel temperatures, flows, pressure drops and thermal capacitance of pebble bed gas cooled reactors in support of the reactor safety case. The PBMR company ... 
Separate effects tests to determine the thermal dispersion instructured pebble beds in the PBMR HPTU test facility
Du Toit, C.G.; Rousseau, P.G.; Kgame, T.L. (Elsevier, 2014)Thermalfluid simulations are used extensively to predict the maximum fuel temperatures, flows, pressure drops and thermal capacitance of pebble bed gas cooled reactors in support of the reactor safety case. The PBMR company ... 
A system CFD simulation of the effect of a pressure pulse on the performance of a reactor cavity cooling system of a very high temperature reactor
Du Toit, C.G.; Rousseau, P.G.; Jun, J.S.; Kim, M.W. (SACAM, 2016) 
A systems CFD model of a packed bed high temperature gascooled nuclear reactor
Du Toit, C.G.; Rousseau, P.G.; Greyvenstein, G.P.; Landman, W.A. (Elsevier, 2006)The theoretical basis and conceptual formulation of a comprehensive reactor model to simulate the thermalfluid phenomena of the PBMR reactor core and core structures is given. Through a rigorous analysis the fundamental ... 
Validation of a transient thermalfluid systems CFD model for a packed bed high temperature gascooled nuclear reactor
Rousseau, P.G.; Du Toit, C.G.; Landman, W.A. (Elsevier, 2006)This paper provides an overview of the theoretical basis for a new thermalfluid systems CFD simulation model for high temperature gascooled reactors, contained in the Flownex software code. Flownex provides for detailed ...