المنشورات و المؤلفات
In two-fluid modelling, accurate prediction of the interfacial transport of mass, momentum and energy is required. Experiments were carried out to obtain a database for the development of interfacial transport models, or correlations, for subcooled...
In two-fluid modeling, accurate prediction of the interfacial transport of mass, momentum, and energy is required. Experiments were carried out to obtain a data base for the development of interfacial transport models, or correlations, for subcooled...
Bubble behavior and mean bubble diameter in subcooled upward flow boiling in a vertical annular channel were investigated under low pressure and mass flux conditions. High-speed photographic results indicated that, contrary to the common...
Axial void fraction profiles in subcooled flow boiling in a vertical annulus were obtained using gamma attenuation techniques for different levels of mass flux, wall heat flux and inlet subcooling. A mechanistic model was developed to predict the...
The performance of multi-stage flash, MSF, desalination system is studied during the design stage. Effects of number of stages, top brine temperature and feed-desalinated water ratio on MSF system operating limits, coefficient of performance and...
An analysis is presented for fully developed laminar convective heat transfer in a pipe provided with internal longitudinal fins, and with uniform outside wall temperature. The fins are arranged in two groups of different heights. The governing...
Fully developed laminar convective heat transfer in a partially heated pipe was investigated. The tube was assumed to be heated along a peripheral angle eh while the rest of its surface was assumed to be adiabatic. Two different heating conditions...
Natural convection from a vertical plate enclosed in a horizontal cylinder was investigated numerically using finite element technique together with SIMPLER algorithm. Enclosure geometric configurations of L/Do = 0.25, 0.5 and 0.75, and Do = 0.1, 0....
Natural convection in horizontal cylindrical annuli was investigated numerically using finite
element technique together with SIMPLER algorithm. Annulus geometric configurations of
Do/Di = 2, 3, 4 and 5 were investigated. Laminar conditions up to...
Two-dimensional laminar natural-convection heat transfer in air around horizontal ducts with rectangular and square cross sections is studied numerically. Different aspect ratios are used for wide ranges of Rayleigh numbers. Results are presented in...
Natural convection heat transfer between two horizontal concentric cylinders with two fins attached to the inner cylinder was numerically investigated using finite element technique together with SIMPLER algorithm. Laminar conditions up to Rayleigh...
Purpose – The aim is to study the effects of fin conductivity ratio, Darcy number, and Rayleigh number on the average Nusselt number for fins made of porous material when attached to the inner cylinder of the annulus between two concentric cylinders...
Effect of nanoparticles on natural convection in horizontal cylindrical annuli was investigated numerically using finite volume technique together with SIMPLE algorithm. Annulus geometric configurations of Do/Di = 2 and 1.25 were investigated. The...
Two dimensional turbulent convective heat transfer behavior of alumina (Al2O3) nanoparticle dispersion in water flow in a horizontal circular pipe at constant wall temperature is investigated numerically. The computational procedure is based on the...
Experimental investigations have been reported on steady state forced convection heat transfer from the outer surface of horizontal triangular surface cylinders in cross flow of air. Two different horizontal positions are considered; one when the...
Two dimensional laminar forced convection heat transfer around horizontal triangular cylinder in air is investigated numerically. Equilateral triangular cylinder of different side dimensions and configurations are examined under laminar conditions (...
Grid-quality parabolic trough collectors utilize expensive receivers that maintain vacuum in their annuli to reduce convection losses. On the other hand, receivers with air-filled annuli, currently used mainly for process heat applications, are...
Laminar natural convection heat transfer from uniformly heated horizontal cylinders of triangular cross section is investigated numerically in air. Different cylinder cross section dimensions and orientations are examined under laminar conditions....
Insulating materials are very important in our daily life. They are used in building walls, refrigerators, some electrical devices, in insulating the electrical cables and in many other applications. This study presents experimental work done to...
Flow visualization was used to measure hydraulic jump radius on square plate. Heat transfer between water jet and a horizontal square surface was investigated experimentally for different jets and square sizes. Effects flow rates on heat transfer...
Experimental investigation to study the heat transfer between a vertical round alumina-water nanofluid jet, and a horizontal circular round surface is carried out. Different jet flow rates, jet nozzle diameters, various circular disk diameters and...
Experimental investigation on natural convection heat transfer has been carried out inside vertical circular enclosures filled with Al2O3 nanofluid with different concentrations; 0.0%, 0.85% (0.21%), 1.98 (0.51%) and 2.95% (0.75%) by mass (volume...
Experimental investigation is made to study the heat transfer between a vertical round alumina (Al2O3) nanofluid jet and a horizontal heated circular disk. Different jet flow rates, jet diameters, and nanoparticles concentration are used. Water is...
Experimental investigation on natural convection heat transfer has been carried out inside horizontal circular enclosures filled with Al2O3 nanofluid with different concentrations; 0.0%, 0.85% (0.21%), 1.98 (0.51%) and 2.95% (0.75%) by mass (volume...
An experimental study is conducted to cool the ambient air using a new humidification technique. A wind tunnel is built with a test section formed by four modified MiniModule membrane contactors. An ambient air passes over the membrane contactors (...
Laminar natural convection heat transfer from torus is numerically investigated for two conditions; having isothermal surface or being uniformly heated. Tori with different diameter ratios are examined under laminar conditions. The computational...
An experimental study is conducted to cool the ambient air using a new humidification technique. A wind tunnel is built with a test section formed by a matrix of ceramic tubes. An ambient air passes over the ceramic tubes matrix (cross flow) where...