Kirkuk Journal of Science (Jun 2010)
Forced Convection about a Horizontal Cylinder Embedded in a Porous Medium
Abstract
Theoretical and experimental study was carried out of heat transfer by forced convection from the cylinder in cross flow embedded in a saturated porous media. the theoretical part of the work includes solving the standard energy transport equation in porous media regions by FLUENT. there are maximum temperature and minimum velocity at the rear of cylinder but minimum temperature and maximum velocity at the front of cylinder . the stagnant area at and the separation at .. The experimental part of this work included the construction of an experimental model composed of cast iron cylinder with a (18 mm) inner diameter and (20mm) outer diameter with a length of(200mm) heated internally by an electrical heater. The cylinder was embedded in a packing of glass ball with diameter (12mm) placed in across flow wind tunnel. The experimental results revealed that the average heat transfer increased when the Peclets number and Reynolds number increased for steady state condition. The relationship between Na&Re and Na&Pe for experimental gives us Nu=alnRe-b and Nu=2Pe-2.666 respectively when a and b are constants depending on Re and Q for (Q in watt) and , .
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