This paper presents a study of the laminar flow in a channel with longitudinal moving bars arrayed along the channel width. The governing equations describing the fluid, which flows along the direction of the bar’s length, are expressed with double Poisson equations and are solved by eigenfunction-expansion and point-match method. The result shows that when the solid bars move forward, the fluid flow will move in the same direction, and the decreases as the positive velocity of bars increases. However, when the bars move backward, a reverse flow will occur in the channel, and the is higher at larger negative velocity of bars. For a channel flow with moving bars, the value is not a constant, such as a classical one without moving bars, in which the value is a constant. Furthermore, when the area of the cross section of the bar is fixed, both the mean velocities and the values of the fluid can be obtained under different velocities and aspect ratios of the bars.
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e-mail: hphu@mail.ntou.edu.tw
e-mail: rhyeh@mail.nkmu.edu.tw
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November 2009
Research Papers
Theoretical Study of the Laminar Flow in a Channel With Moving Bars
Hai-Ping Hu,
Hai-Ping Hu
Department of Marine Engineering,
e-mail: hphu@mail.ntou.edu.tw
National Taiwan Ocean University
, No. 2, Pei-Ning Road, Keelung 20224, Taiwan
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Rong-Hua Yeh
Rong-Hua Yeh
Department of Marine Engineering,
e-mail: rhyeh@mail.nkmu.edu.tw
National Kaohsiung Marine University
, No. 142, Haijhuan Road, Nanzih District, Kaohsiung City 81143, Taiwan
Search for other works by this author on:
Hai-Ping Hu
Department of Marine Engineering,
National Taiwan Ocean University
, No. 2, Pei-Ning Road, Keelung 20224, Taiwane-mail: hphu@mail.ntou.edu.tw
Rong-Hua Yeh
Department of Marine Engineering,
National Kaohsiung Marine University
, No. 142, Haijhuan Road, Nanzih District, Kaohsiung City 81143, Taiwane-mail: rhyeh@mail.nkmu.edu.tw
J. Fluids Eng. Nov 2009, 131(11): 111102 (7 pages)
Published Online: October 19, 2009
Article history
Received:
April 10, 2009
Revised:
July 26, 2009
Published:
October 19, 2009
Citation
Hu, H., and Yeh, R. (October 19, 2009). "Theoretical Study of the Laminar Flow in a Channel With Moving Bars." ASME. J. Fluids Eng. November 2009; 131(11): 111102. https://doi.org/10.1115/1.4000261
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