Circulation Structure in a Stratified Cavity Flow
Publication: Journal of Hydraulic Engineering
Volume 111, Issue 2
Abstract
Experiments were conducted to study the circulation patterns and mixing processes in a stratified, lid‐driven cavity flow. The ratio of the cavity depth to width used was 1:1 and that of span to width was 3:1. The flow is different from those reported in the literature in up to four ways, viz., recirculation is a dominant feature, temperature control is used to obtain the stratification, the upper and lower boundaries are held at different constant temperatures, and the flows considered are, at most, only partially turbulent. For the geometric configuration used, the following may be concluded about the flow. The flow is strongly three‐dimensional. The number of circulation cells expected in this stratified flow can be estimated from the value of the bulk Richardson number, Given a local Richardson number, Ri, the entrainment rate, E, is found to be proportional to indicating a shear‐induced mixing process related to the recirculation. Taylor‐Görtler‐like vortices above the thermocline are significant contributors to the mixing process.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 111 • Issue 2 • February 1985
Pages: 334 - 354
Copyright
Copyright © 1985 ASCE.
History
Published online: Feb 1, 1985
Published in print: Feb 1985
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