Treatment of Nonhomogeneous Terms in Flow Modelsby Raymond W. Schaffranek, (M.ASCE), Natl Center, Reston, United States,
Chintu Lai, (M.ASCE), Natl Center, Reston, United States,
Abstract: A study of the relative significance and treatment of nonhomogeneous terms in unsteady open-channel flow simulation models has been conducted. The effects of nonhomogeneous terms including bed slope, frictional resistance, nonprismatic channel geometry, lateral flow, and wind stress were evaluated using two models employing varied formulations and different solution methods. Results of numerical experiments demonstrate the behavior and allow for comparison of nonhomogeneous effects in different numerical contexts. The nonlinear behavior of the terms is analyzed and discussed.
Subject Headings: Flow resistance | Open channel flow | Numerical methods | Homogeneity | Unsteady flow | Hydraulic models | Mathematical models | Water flow
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