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ISSN 打印: 2151-4798
ISSN 在线: 2151-562X

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DOI: 10.1615/SpecialTopicsRevPorousMedia.v10.i3.20
pages 225-230

EXPERIMENTAL STUDY ON THE AIR FLOW PAST A VERTICAL CIRCULAR CYLINDER COATED WITH A POROUS MATERIAL

Ehab Hussein Bani-Hani
Mechanical Engineering Department, Australian College of Kuwait, Safat 13015, Kuwait
Khalil Khanafer
Mechanical Engineering Department, Australian College of Kuwait, Safat, 13015
Jessica Lopez
Mechanical Engineering Department, Australian College of Kuwait, Safat 13015, Kuwait
Girish Mohanan
Mechanical Engineering Department, Australian College of Kuwait, Safat 13015, Kuwait

ABSTRACT

An experimental study was conducted to measure the drag coefficient for a flow of air around a vertical circular fully porous-coated cylinder at various Reynolds number and different thickness of coating. The experiments are conducted in a wind tunnel apparatus for different thickness of a porous coating material. The drag coefficient is also calculated for different diameters of the cylinder and flow speed. The experimental results of this investigation show that as the diameter of the cylinder increases, the drag force increases. Moreover, the use of the porous coating materials increases the drag force. The increase in the drag force by applying porous coating is found to be higher for smaller cylinders. For 29.6 mm cylinder diameter, the percentage of increase in drag force is 77% for one layer of porous coating material compared with no coating situation. However, the percentage increase in drag force for two layers of porous coating is 29%. For 49.0 mm cylinder diameter, the increase is 48% for adding one layer compared with no layer, and it is only 16% if a second layer is added.

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