Time-dependent free-surface flows due to a sink: A quantitative analysis of the drain-size effect

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Unsteady motions of sink flows having a free surface are studied numerically. First, for a line sink, the results on dip formation are obtained and corroborate Tyvand's series solution [Phys. Fluids A4, 671 (1992)], except for small disagreements for large t owing to the finiteness of the calculational domain in our numerical approach. Next, to investigate the drain-size effect in dip formations, free-surface hows due to a sink array are considered. The effective sink strength q(eff) is found to be approximated by q(eff)/q(0) = 1 - alpha(d/2)(beta), alpha approximate to 0.27, beta approximate to 1.86, q(0) is the total sink strength, and d is the array length.
Publisher
KOREAN PHYSICAL SOC
Issue Date
1997-08
Language
English
Article Type
Article
Keywords

SELECTIVE WITHDRAWAL; GAS ENTRAINMENT; STRATIFIED FLUID; SUBMERGED SOURCE; LINE SOURCE; POINT SINK; TANK

Citation

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.31, no.2, pp.235 - 240

ISSN
0374-4884
URI
http://hdl.handle.net/10203/70082
Appears in Collection
PH-Journal Papers(저널논문)
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