Browsing Conference Papers - Potchefstroom Campus by Author "Du Toit, C.G."
Now showing items 1-17 of 17
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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 ... -
Comparison between Flownex and CORONA thermal-hydraulic models for a single HTR prismatic fuel assembly
Khoza, S.N.; Du Toit, C.G.; Rousseau, P.G.; Lee, S.N. (ANS (American Nuclear Society), 2016) -
The evaluation of 3D CFD approaches to model the flow and heat transfer inside an unstructured bed of uniform spheres
Potgieter, M.C.; Du Toit, C.G.; Kruger, J.H. (SACAM, 2016) -
Experimental investigation of the effective thermal conductivity in the near-wall region of a packed pebble bed
De Beer, M.; Du Toit, C.G.; Dreyer, H. (SACAM, 2016) -
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 least-squares polynomial fit. It also presents an equation to calculate the confidence interval in the slope of a regression ... -
Finite element solution of fully developed non-isothermal laminar flow in annuli
Du Toit, C.G. (SACAM, 2010) -
The flow and heat transfer in a packed bed high temperature gas-cooled reactor
Du Toit, C.G.; Rousseau, P.G. (ASME, 2010)Engineers are faced with two major challenges when carrying out the thermal-fluid design of a complex system consisting of many interacting components such as the PBMR power plant. The first challenge is to predict the ... -
Fluid flow distribution above an annular bed of randomly packed spheres
Reyneke, H.J.; Du Toit, C.G. (SAAM, 2010) -
Formulation of a unit cell for a thermal-hydraulic systems model of a prismatic fuel block of a high temperature gas-cooled reactor
Khoza, S.N.; Du Toit, C.G.; Rousseau, P.G. (SACAM, 2016) -
A fully integrated 3D CFD model of the flow and heat transfer in a packed bed reactor
Potgieter, M.C.; Du Toit, C.G.; Kruger, J.H. (ANS (American Nuclear Society), 2016) -
Investigation of 1D system CFD and 3D CFD numerical methodology applied to an experimental facility
Niemand, P.F.; Du Toit, C.G. (SAAM, 2018)The fourth generation gas-cooled nuclear reactor designs provide a promising prospect for energy and process heat generation. The designs` cycles have high thermal efficiencies, require relatively little fuel and are safe ... -
Modelling of convection heat transfer in the SNU Riser Heat transfer Experimental Facility (RHEF)
Du Toit, C.G.; Shin, D.H.; Park, G.C. (SAAM, 2018)The Reactor Cavity Cooling System (RCCS) of a High Temperature Gas-cooled Reactor (HGTR) plays an important role in ensuring the integrity of the HTGR during normal operating and accident conditions. The performance of ... -
Re-evaluation of the separation parameters based on the Berman-Olander long-bowl gas-centrifuge solution
Du Toit, C.G.; Mercurio, Giovanni (SAAM, 2014)The hydrodynamic equations for a long-bowl gas-centrifuge can be simplified to obtain a one-dimensional differential equation for the variation of the non-dimensional axial velocity in the radial direction. This equation ... -
A system CFD model of the heat transfer in a prismatic block of a VHTR
Nel, G.J.; Du Toit, C.G. (SAAM, 2018)The conduction heat transfer through the prismatic blocks containing the fuel elements in a Very High Temperature Reactor (VHTR) is of crucial importance for the proper operation of the reactor under normal operating ... -
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) -
Using an effective viscosity to account for the effect of the walls on the pressure drop through an annular packed bed
Du Toit, C.G.; Van der Walt, A.J.K.; Van der Merwe, J. (ASME, 2009)The question arose whether the correlation for the pressure drop prescribed for cylindrical pebble bed reactors by the Nuclear Safety Commission (KTA) of Germany could still be applied to the proposed annular configuration ...