Browsing Conference Papers by Author "10184600 - Du Toit, Charl Gabriel De Kock"
Now showing items 1-20 of 27
-
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 ... -
Analysis of the porous structure of packed beds of spheres using computed X-ray tomography
Du Toit, C.G.; Rosslee, P.J. (SAAM, 2012) -
CFD analysis of thermal dispersion in a structured packed bed
Vermaak, H.J.; Du Toit, C.G. (SACAM, 2018)Packed beds are generally modelled in a partial manner to avoid computational costs. This implies that only a small portion of the representative bed is modelled explicitly in CFD simulations, usually by assuming ... -
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) -
The global galerkin finite element method as applied to the 1d beam equation: a systems approach
Du Toit, C.G. (SAAM, 2006)The paper focuses on the finite element solution of the fourth-order differential for an EulerBernoulli beam. In this approach the point point loads and concentrated moments are treated in a natural way as part of the ... -
Global Galerkin finite element solution of the fourth-order Euler- Bernoulli beam equation
Du Toit, C.G. (SAAM, 2010) -
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 ... -
Local rise of total pressure in viscous flow through cylindrical packed beds with spherical particles
Van der Merwe, W.J.S.; Du Toit, C.G.; Kruger, J.-H. (SAAM, 2014) -
Modelling of convection heat transfer in ducts in 1D systems codes
Du Toit, Charl G.; Van Antwerpen, Herman J. (IHTC, 2018)Convection heat transfer between a solid and a fluid plays a crucial role in amongst others ducts in heat exchangers, the riser tubes in reactor cavity cooling systems and between the graphite and coolant channels in the ... -
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 ... -
Modelling the superficial velocity distribution inside an annular packed bed
Reyneke, H.J.; Du Toit, C.G. (SAAM, 2010)