Ayad K. Hassan

university of technology · materail

The research conducted deals with the use of an aluminum heat sink, which is usually used to cool electronic cores and integrated circuits, to cool a solar cell and study the effect of microprocessors and integrated circuits on the performance and temperature of the cell. In this study, an experiment was carried out and simulated using computationa...

In this research, the Pulsed Laser Deposition (PLD) technique was used, and the operating frequency of the laser was tuned to a double frequency. This was done in order to construct nano-thin films of titanium oxide (TiO2). An Nd-YAG laser with a wavelength of 1064 nm, pulse frequency of 6 Hz, and laser energy of 700, 800, and 900 mJ were used on g...

The response of aluminium plates (6061-T6) under low velocity impact is investigated numerically using ABAQUS software package. Firstly, the effect of the sample thickness on the perforation resistance of the aluminium plates is undertaken. It was shown that the perforation behaviour of the plates investigated increases with the target thickness an...

The contact angle is very important parameter in improving the self-cleaning property as well as in increasing the wear resistance of engineering surfaces in addition to improving the thermal transfer properties of materials in general. In this study, titanium dioxide nanoparticles were added to the epoxy resin and sprayed on a substrate of the bra...

A numerical investigation of two-dimensional natural convection about a horizontal circular heated cylinder embedded in cylindrical packed bed of spheres under the condition of local thermal non-equilibrium is reported. The present parametric investigation concentrates on the use of two-phase energy model (local thermal non-equilibrium LTNE), which...

A numerical investigation of two-dimensional natural convection about a horizontal circular heated cylinder embedded in cylindrical packed bed of spheres under the condition of local thermal non-equilibrium is reported. The present parametric investigation concentrates on the use of two-phase energy model (local thermal non-equilibrium LTNE), which...

The present paper deals with a numerical study of the hydrodynamic and thermal characteristics resulted from mixed convection in four shapes of wavy cavity at different angles of inclination. The top horizontal cooled wall moving as lid-driven is kept at constant temperature TC and the bottom hot wall is kept at constant temperature Th. The stream...

In this research, the composite material was prepared from untreated and treated corn cob powder by acetylation process and the physical and mechanical properties have been studied. Cellulose is extracted using the Kürchner-Hoffer method and then acetylated. Untreated corn cob powder and Acetylated corn cob powder were mixed with unsaturated polyes...

This research presents an experimental investigation of eggshell powder (ESP) addition influence on the Portland cement mortar performance. Two different eggshell powders states were prepared. These include untreated eggshell powder (UESP) and treated eggshell powder (TESP). The TESP consists of heating the ESP to 750 °C for one hour in an electric...

Numerical method is used to solve the two-dimensional transient natural convection heat transfer problem in an inclined shallow porous cavity. A constant heat flux is applied for heating and cooling all opposing walls. Solutions for laminar case are obtained within Rayleigh number varied from 20 to 500 and aspect ratio for porous cavity varied from...

Numerical models are used to solve the two-dimensional transient natural convection heat transfer problem in an inclined shallow porous cavity. A constant heat flux is applied for heating and cooling all opposing walls. Solutions for laminar case are obtained within Rayleigh number varied from 20 to 500 and aspect ratio for porous cavity varied fro...

Numerical solutions are presented for the transient natural convection heat transfer problem in horizontal isothermal cylindrical annuli, enclosed in heated inner and cooled outer cylinders. Solutions for laminar case were obtained within Grashof number based on the inner diameter which varied from 1x10 2 to 1x10 5 in air. Both vorticity and energy...

Numerical solutions are presented for the transient natural convection heat transfer problem in horizontal isothermal cylindrical annuli, enclosed in heated inner and cooled outer cylinders. Solutions for laminar case were obtained within Grashof number based on the inner diameter which varied from 1x102 to 1x105 in air. Both vorticity and energy e...