Browsing by Advisor/Supervisor
Now showing items 1-16 of 16
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Application of the rate form of the equation of state for the dynamic simulation of thermal-hydraulic systems
(2013)The modelling of multi-phase water flow is an important modern-day design tool used by engineers to develop practical systems which are beneficial to society . Multi-phase water flow can be found in many important industrial ... -
Characterisation of long range radiation heat transfer in packed pebble beds
(North-West University, 2011)Due to its importance in the safety case of high temperature gas-cooled nuclear reactors, the effective thermal conductivity in packed pebble beds has been extensively studied by various researchers and several correlations ... -
Characterisation of the effective thermal conductivity in the near wall region of a packed pebble bed
(North-West University (South Africa)., 2021)The effective thermal conductivity is an important parameter that is representative of the overall heat transfer in a packed bed of spheres. An accurate prediction of the effective thermal conductivity is necessary for the ... -
Characterisation of thermal radiation in the near-wall region of a packed pebble bed
(2014)The heat transfer phenomena in the near-wall region of a randomly packed pebble bed are important in the design of a Pebble Bed Reactor (PBR), especially when considering the safety case during accident conditions. At ... -
Comparison of heat transfer models at the pebble, gas and reflector interface in the PBMR
(North-West University, 2010)It is a great challenge in the design of the PBMR to accurately predict gas flow and heat transfer in the reactor. Understanding the heat transfer at the core-reflector interface in particular is a very important aspect ... -
Effective material usage in a compact heat exchanger with periodic micro–channels
(North-West University, 2012)All modern High Temperature Reactors (HTR) thermal cycles have one thing in common: the use of some form of heat exchanger. This heat exchanger is used to pre-heat or cool the primary loop gas, from where the secondary ... -
Friction factors and nusselt numbers for laminar flow in ducts
(North-West University, 2009)By using the finite element method to solve the appropriate momentum and energy equations the friction factors and Nusselt numbers for fully developed laminar flow were determined for one- and two-dimensional flow systems. ... -
Gradient calculations of non–orthogonal meshes in the finite volume method
(North-West University, 2013)The handling of gradient calculations on non-orthogonal meshes in the Finite Volume Method (FVM) is important in the modelling of complex geometries, since different implementation methods have an influence on the accuracy ... -
An integrated thermal-hydraulic system CFD model of a prismatic block HTR core using Flownex
(North-West University (South Africa), Potchefstroom Campus, 2019)The active core of a prismatic high temperature reactor (HTR) consists of standard fuel, reserve shutdown and control blocks which must be maintained within a safe operating envelope. The fuel blocks are coupled to the ... -
Modelling the effective thermal conductivity in the near–wall region of a packed pebble bed
(North-West University, 2009)Inherent safety is claimed for gas-cooled pebble bed reactors, such as the South African Pebble Bed Modular Reactor (PBMR), as a result of its design characteristics, materials used, fuel type and physics involved. Therefore, ... -
Numerical analysis of the flow distribution within packed columns using an explicit approach
(North-West University, 2011)Existing correlations developed to account for pressure drop and velocity distribution in packed beds are not ideal for beds with low aspect ratios. This study investigated a method to model flow distribution through ... -
Numerical modelling of the flow and heat transfer in a prismatic block VHTR singlechannel fuel module
(North-West University (South Africa). Potchefstroom Campus, 2019)No Abstract available -
Pressure drop through a packed bed
(North-West University, 2006)The importance of the development of PBMR technology for the generation of electricity in South Africa is undeniable. Part of the development includes simulation models to predict operating and transient thermal-fluid ... -
Pressure formulation and adaptive control of numerical algorithms for transient flow in pipe networks
(North-West University, 2012)Fluid flow network simulation codes are commonly used as a design and analysis tool for many engineering problems such as gas distribution networks, power plants and heat pumps. Two formulations of conservation of momentum ... -
Simulation of natural circulation in an air-cooled Reactor Cavity Cooling System using Flownex
(2014)Nuclear reactors with improved safety concepts are currently being studied within the nuclear engineering community, with a focus on passive safety features. One of these reactor concepts is the Very High Temperature ... -
Steel slab surface quality prediction using neural networks
(North-West University, 2003)Columbus Stainless grinds the majority of the steel slabs that are produced to improve the surface quality. However, the surface quality of some slabs is good enough not to be ground. If a reliable method can be found to ...