Browsing Research Articles (Mechanical and Mechatronic Engineering) by Title
Now showing items 1-20 of 61
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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 ... -
Cooling tower performance : a critical evaluation of the Merkel assumptions
(South African Institution of Mechanical Engineering, 2004)The simpltfying assamptions made by Merkel ure critically evaluated by comparing the Merkel analysis to the more rigoroas Poppe analysis of cooling tower performnnce. It is shown that the uccaracy of the Merkel method ... -
Creep damage assessment of ex-service 12% Cr power plant steel using digital image correlation and quantitative microstructural evaluation
(MDPI, 2019)ENGLISH ABSTRACT: The lifetime of steam pipelines in long-term operation in coal-fired power plants are limited due to material damage that resulted from creep exposure. In the present study, the authors comparatively ... -
Data for indirect load case estimation of ice-induced moments from shaft line torque measurements
(Elsevier, 2018)ENGLISH ABSTRACT: During ice navigation, blade measurements of ice-induced moments on ship propellers, are challenged by the harsh operating environment. To overcome this problem, shaft line measurements are performed ... -
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 ... -
Design analysis methods for Stirling engines
(Energy Research Centre, University of Cape Town, 2008)Worldwide attempts are being made to increase the use of our renewable energy sources as well as to use our current fossil fuel energy sources more efficiently. Waste heat recovery forms a substantial part of the latter ... -
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 ... -
Developoment of a magnetic intra-uterine manipulator
(South African Institution of Mechanical Engineering, 2013)This paper introduces the concept of a novel magnetic intra-uterine manipulator, intended to overcome conventional medical devices’ shortcomings, and enabling non-invasive uterine manipulation during surgery. However, ... -
Effects of defects on mechanical properties in metal additive manufacturing : a review focusing on X-ray tomography insights
(Elsevier, 2019)ENGLISH ABSTRACT: X-ray tomography has emerged as a uniquely powerful and non-destructive tool to analyze defects in additive manufacturing. Defects include unintended porosity, rough surfaces and deviations from design, ... -
Electric vehicle sound stimuli data and enhancements
(Elsevier, 2018)Data for six electric vehicle WOT interior sound measurements and eight enhanced sound signatures are presented. The measurement of electric vehicle interior sound signature data and the enhancement of these stimuli are ... -
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 evaluation of a Ranque-Hilsch vortex tube as a particle separator
(South African Institution of Mechanical Engineering, 2012)The Pebble Bed Modular Reactor (PBMR) is a Generation IV graphite-moderated helium cooled nuclear reactor developed in South Africa from the German Arbeitsgemeinschaft Versuchreaktor (AVR). After decommissioning of the ... -
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 -
Flooding during reflux condensation of steam in an inclined elliptical tube
(South African Institution of Mechanical Engineering, 2000)In this erperimental inuestigation the pressure drop is measured between the headers located at the ends of an in,clined air-cooled elliptical tube in which refl,ur condensation of steam occurs. The cross-section of the ... -
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 ...
