Browsing Research Articles (Mechanical and Mechatronic Engineering) by Title
Now showing items 1-20 of 38
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An algorithm for fast optimal Latin hypercube design of experiments
(Wiley-Blackwell, 2010-04)This paper presents the translational propagation algorithm, a new method for obtaining optimal or near optimal Latin hypercube designs (LHDs) without using formal optimization. The procedure requires minimal computational ... -
Combined effect of buoyancy force and Navier slip on MHD flow of a nanofluid over a convectively heated vertical porous plate
(Hindawi, 2013)We examine the effect of magnetic field on boundary layer flow of an incompressible electrically conducting water-based nanofluids past a convectively heated vertical porous plate with Navier slip boundary condition. A ... -
Constrained particle swarm optimization using a bi-objective formulation
(Springer Verlag, 2010)This paper introduces an approach for dealing with constraints when using particle swarm optimization. The constrained, single objective optimization problem is converted into an unconstrained, bi-objective optimization ... -
Deflection of Ag-atoms in a magnetic field
(2011)ENGLISH ABSTRACT: An apparatus that generates and deflect silver-109 atoms with an inhomogeneous and homogeneous magnetic field was constructed. The experimental results found using this apparatus were used to make a ... -
The design and testing of a secure surface tension driven water pump
(2015)ENGLISH ABSTRACT: Water pumping is essential for life as we know it. The drive for alternative energies together with the need for water pumping has inspired the construction of a surface tension driven water pump (STDWP). ... -
The development of a 1D-transient simulation model of a CO2 refrigeration system
(2016)ENGLISH ABSTRACT: Refrigeration is a highly essential part of modern day living. The drive for alternative cleaner technologies has renewed interest in designing refrigeration systems using CO2 as refrigerant. The goal of ... -
Energy supply in Malawi : options and issues
(Energy Research Centre, 2015)Inadequate energy supply is one of the major problems confronting Malawi and limiting its social, economic and industrial development. This paper reviews the current status of energy supply and demand in Malawi; examines ... -
Experimental investigation and numerical simulation of instabilities in a multi-parallel channel two-phase natural circulation system
(2015)ENGLISH ABSTRACT: In the present study, two-phase natural circulation flow in a multi-parallel channel system is investigated using experimental and numerical modelling. The experimental model consisted, essentially, of ... -
Exploring South Africa’s southern frontier : a 20-year vision for polar research through the South African National Antarctic Programme
(Academy of Science of South Africa, 2017)No abstract available -
Flow regime recognition in two-phase thermosyphon loops using pressure pulse analyses
(Thermal-Fluids Central, 2012)ENGLISH ABSTRACT: The nuclear industry finds application for natural circulation in the form of passive heat removal systems used under accident conditions as well as for the removal of parasitic heat loss during normal ... -
Heat pipe heat exchanger for high temperature nuclear reactor technology
(Global Digital Central, 2013)ENGLISH ABSTRACT: When a high temperature nuclear reactor is used to supply process heat, nuclear regulators require an intermediate heat transfer loop between the primary reactor coolant stream and the secondary process ... -
Heat transfer to MHD oscillatory dusty fluid flow in a channel filled with a porous medium
(Indian Academy of Sciences, 2015)In this paper, we examine the combined effects of thermal radiation, buoyancy force and magnetic field on oscillatory flow of a conducting optically thin dusty fluid through a vertical channel filled with a saturated porous ... -
Heat treatment of TI-6AL-4V produced by laserCUSING
(SAIIE, 2015)LaserCUSING® is a selective laser melting (SLM) process that is capable of manufacturing parts by melting powder with heat input from a laser beam. LaserCUSING demonstrates potential for producing the intricate geometries ... -
Hydraulic modeling of a confined gas recirculation mixing system for a CSTR anaerobic digester
(2016)ENGLISH ABSTRACT: Hydraulic numerical rnadelling and experimental werk was used to develop a mixing system, that is able to satisfy the biologica! requirement of micro bacteria and create a homogeneaus salution inside ... -
Inside-pipe heat transfer coefficient characterization of a thermosyphon-type heat pipe suitable for the reactor cavity cooling system of the Pebble Bed Modular Reactor
(2011)ENGLISH ABSTRACT: The feasibility of a closed loop thermosyphon for the Reactor Cavity Cooling System of the Pebble Bed Modular Reactor has been the subject of many research projects. One of the difficulties identified by ... -
Investigation of two-stage electrostatic precipitation for silver removal from a helium stream
(2010)ENGLISH ABSTRACT: In high temperature gas cooled nuclear reactors various unwanted particles have been found to plate out onto the surfaces of the primary cicuit components. A simple deterministic deflection model is ... -
Material and energy flow analysis of the Malawian tea industry
(Elsevier, 2016)ENGLISH ABSTRACT: This paper briefly reviews the material and energy flows of the Malawian tea industry, in order to identify opportunities and reduce its environmental impacts. The review also details the concept and ... -
Microstructure and mechanical properties of direct metal laser sintered TI-6AL-4V
(SAIIE, 2015)Direct metal laser sintering (DMLS) is a selective laser melting (SLM) manufacturing process that can produce near net shape parts from metallic powders. A range of materials are suitable for SLM; they include various ... -
Modelling and testing a passive night-sky radiation system
(University of Cape Town, Energy Research Centre, 2017)ENGLISH ABSTRACT: The as-built and tested passive night-sky radiation cooling/heating system considered in this investigation consists of a radiation panel, a cold water storage tank, a hot water storage tank, a room and ... -
Non-contact experimental methods to characterise the response of a hyper-elastic membrane
(Springer Open, 2017-07-24)Background: Membranes often feature in dynamic structures. The design of such structures generally includes the evaluation of their dynamic characteristics, such as natural frequecies and mode shapes. Methods: The ...
