Showing 5 results for A. Rostami
S. Mortazavi, A. A. Rostami,
Volume 5, Issue 1 (10-1987)
Abstract
A. Rostami, M. Pasandideh Fard,
Volume 11, Issue 1 (10-1992)
Abstract
S. Talebi and A.a. Rostami,
Volume 14, Issue 1 (1-1994)
Abstract
Refrigerants that are used in refrigeration systems, cause environmental difficulties such as depletion of ozone layer and greenhouse effect. Thus, we must find substitutes for such refrigerants, in this paper, the effect of refrigerant on the thermodynamics performance of refrigeration cycles are studied. To do this, a refrigerator that has designed for R12, is simulated. Results show that pure refrigerant R134a and mixture R32/R132b are convenient substitutes for R12.
Ail A. Rostami, and M. R. Khosravi,
Volume 15, Issue 1 (7-1994)
Abstract
Natural convection between vertical parallel plates occurs frequently in applications such as solar collectors and cooling of electronic instruments. The problem is a two dimensional developing buoyant flow. In this work, the two dimensional conservation equations are solved numerically for constant wall temperature and constant wall heat flux. The results for the local Nusselt number at the duct exit are compared with the experimental data and the agreement is reasonable.
M. Sefid and A. A. Rostami,
Volume 22, Issue 1 (7-2003)
Abstract
Micro-Channel Heat Sink is a heat exchanger which is used to control the temperature of electronic devices with high heat flux. A comprehensive thermal model for the micro-channels should include three dimensional conduction analysis in the solid body together with three dimensional developing fluid flow as well as heat transfer analyses in the fluid section. This paper reports on a research aimed at finding a solution to the problem. Hydrodynamical and thermal entrance lengths were two parameters considered in this solution. The power law model was used which includes both newtonion and non- newtonion fluids.
Finite difference based on control volume with staggered grid with SIMPLE algorithm was applied in which convection terms were estimated using QUICK method. The results showed that the two entrance length parameters are critical in the estimation of Nusselt number.
Keywords: 3-dimensional, Non-Newtonian, Micro channel, Heat Sink, Thermal Resistance
