The present paper is dedicated to an experimental
study of the effect of gravity forces during
condensation of R134a in an 8.38 mm inner diameter
smooth tube in inclined orientations. Flow pattern, heat
transfer ...
Du Plessis, Hanli; Kearsley, Elsabe P.; Matjie, Ratale Henry(South African Institution of Civil Engineering, 2007-12)
In recent years the cement and concrete industry has reduced its environmental impact by increasing the use of waste materials as both cement extenders and fillers in concrete. Fly ash has been widely used as a cement ...
Jordaan, Gerrit Jacobus; De Bruin, P.W.(SATC, 2004-07)
Paper presented at the 23rd Annual Southern African Transport Conference 12 - 15 July 2004 "Getting recognition for the importance of transport", CSIR International Convention Centre, Pretoria, South Africa. The composition ...
This study investigated the effect of large values of relative surface roughness on the heat transfer and pressure drop characteristics using simultaneously measured heat transfer and pressure drop data. Experiments were ...
The last seven hot rolling passes of the ferritic stainless steels (FSS) AISI 430 and AISI 433 (the latter an Al-added variant of 430) were simulated on Gleeble-1500D® and Gleeble-3800TM® thermo-mechanical simulators to ...
Du Toit, Jacques Louis; Wagner, Claire(Emerald, 2020-12)
PURPOSE : The purpose of this article is to examine the effect of housing type, relative to demographics, on householders' self-reported recycling across low-, medium- and high-density housing without recycling facilities ...
Nsiengani, Emmanuel Nsanda(University of Pretoria, 2017)
Successful electrowinning and electrorefining processes for the production of
high purity and compact electroplated metal require the optimization of the
electrolyte composition and operating parameters. In nickel ...
Noori Rahim Abadi, Seyyed Mohammad Ali; Meyer, Josua P.; Dirker, Jaco(Elsevier, 2018-04)
Almost all work on condensation in tubes were conducted for smooth tubes in a horizontal or vertical orientation, and little has been done at other inclination angles. Recent experimental works with condensation at different ...
Mpye, Godisang David(University of Pretoria, 2020)
The aim of the research is to investigate the effect of increased axle loading on saturated and unsaturated railway foundation materials for heavy haul applications. The research methodology comprises of a literature review ...
Mpye, Godisang David; Grabe, Petrus Johannes(Elsevier, 2021-03)
The benefits of increased axle loading in the railway industry are well-appreciated to such an extent that increased axle loading has become a themed topic of interest across all disciplines of railway engineering. However, ...
Present paper investigates the influence of inlet air
temperature and relative humidity on performance of a PEM
Fuel Cell stack with maximum power of 175 W. In order to
control the inlet air temperature, a cooling system ...
A homogeneous microstructure is required for consistent mechanical properties in
normalised Nb-Ti-V microalloyed plate steels. Frequently, as-hot rolled microalloyed plate
steels have a banded microstructure that is ...
Numerous studies experimentally investigated the heat transfer and pressure drop characteristics of laminar, transitional, quasi-turbulent, and turbulent flow through smooth tubes, however, studies that investigate the ...
Rameetse, Mabusha S.; Aberefa, Oluseyi; Daramola, Michael Olawale(MDPI, 2020-03)
In this study, a carbon nanotube (CNT)-infused blended polymer membrane was prepared and
evaluated for phenol and benzene removal from petroleum industry wastewater. A 25:75 (by weight %)
blended polysulfone/polyethersulfone ...
Molefe, Dan Matlhomola; Labuschagne, F.J.W.J. (Frederick Johannes Willem Jacobus); Focke, Walter Wilhelm; Van der Westhuizen, Isbe; Ofosu, Osei(Sage, 2015-11)
Emulsion grade PVC was plasticised with 100 phr diisononyl phthalate and filled with 30 phr
of different hydrated filler-type flame retardant additives. Static heat stabilities were
determined at 200 oC by following the ...
Jacobs, Bennie(University of Pretoria, 2011-05-20)
It is known that the 1-18 GHz Double Ridge Guide Horn (DRGH) antenna is highly
sensitive to tolerances in manufacturing. Since a typical DRGH antenna is constructed
from a number of individual parts, tolerances in the ...