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|Title:||Numerical modeling of two-dimensional width-averaged flows using boundary-fitted coordinate systems|
|Authors:||Mississippi State University. Department of Aerospace Engineering.|
Environmental and Water Quality Operational Studies (U.S.)
Thompson, Joe Floyd, 1939-
Bernard, Robert S.
Boundary value problems
|Publisher:||Environmental Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: Finite-difference solution of two-dimensional (2D), time-dependent width-averaged Navier-Stokes equations, including an algebraic turbulence model, based on a numerically generated boundary-fitted coordinate system, is discussed. This solution, implemented by the WESSEL computer code, is applicable to 2D regions of arbitrary shape, with multiple inlets and outlets, and with obstacles in the interior. A choice of central, upwind, or ZIP differencing of the convective terms is provided. One-sided differencing is used for the continuity equation. The density is taken to be a function of the temperature, and the system of equations forming the model consists of the continuity equation, the two momentum equations, and the energy equation. Arbitrary distribution of velocity and temperature (or density) can be specified on the inlets and outlets. The solution is implicit in time, with the difference equations being solved simultaneously by SOR (successive overrelaxation) iteration at each time step. Pressure is calculated via Chorin's method. The WESSEL code permits analysis of hydrodynamics for a variety of applications to Civil Works projects.
|Appears in Collections:||Technical Report|