Quasi‐3D Numerical Modeling of Shallow‐Water Circulation
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 4
Abstract
A quasi‐three‐dimensional numerical model composed of two coupled modules has been developed for computing circulations in shallow waters. The depth‐averaged flow is computed in one of the modules, and the vertical distribution of the flow velocities is determined in the other. A simple algebraic formulation is assumed for the vertical eddy viscosity. Based on measurements of velocity profiles in a wind‐water flume, it was found that the vertical eddy viscosity should be scaled using the larger value of the bed‐ and surface‐friction velocities. For the cases considered, computations using the model supported the results. Secondary currents caused by curvature effects and Coriolis force in open channel flow can be simulated by using the model. The model was also applied to compute circulations in a model harbor basin where measurements of velocities were available. The advective terms in the equations of motion are shown to be important to model the three‐dimensional features of these flows.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 4 • April 1993
Pages: 458 - 472
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Feb 14, 1992
Published online: Apr 1, 1993
Published in print: Apr 1993
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