Research Article
Jun 1978
Efficient Pressure Solutions for Circulation Prediction
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 104, Issue 6
Abstract
Two formulations of the rigid-lid wind-driven lake circulation model are presented. The first formulation results in the standard quasi-steady elliptic pressure equation. The second, used in variable topography applications, is a time splitting formulation resulting in a second-order elliptic pressure equation with coefficients that vary at each time step. These pressure equations are discretized by the finite element method and the quickest equation solver identified as a function of the degree of equation nonlinearity, the time variability of the applied surface wind shear, and permissible computational time step. The equation solvers are standard, readily available, easily programmable, and included optimal successive over relaxation, double sweep successive over relaxation, Aitken acceleration, direct Gaussian elimination with back-substitution, and direct Gaussian elimination with repeated elimination. The conclusion was that for large incremented changes in boundary loadings over the numerical time step, direct elimination results in considerable computation savings.
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Published In
Journal of the Hydraulics Division
Volume 104 • Issue 6 • June 1978
Pages: 899 - 915
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Jun 1978
Published online: Feb 3, 2021
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Authors
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Keith W. Bedford, M.ASCE
Asst. Prof. of Civ. Engrg., Ohio State Univ., Columbus, Ohio, USA
Iqbal S. Rai, M.ASCE
Post-Doctoral Research Assoc., Dept. of Civ. Engrg., Ohio State Univ., Columbus, Ohio, USA
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.