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Indexed by:期刊论文

Date of Publication:2008-02-01

Journal:JOURNAL OF HYDRODYNAMICS

Included Journals:EI、SCIE

Volume:20

Issue:1

Page Number:108-116

ISSN No.:1001-6058

Key Words:unstructured grid; non-hydrostatic; k- epsilon turbulence model; free surface flow

Abstract:The three-dimensional Navier-Stokes equations were solved with the fractional step method where the hydrostatic pressure component was determined first, while the non-hydrostatic component of the pressure was computed from the pressure Poisson equation in which the coefficient matrix is positive definite and symmetric. The eddy viscosity was calculated from the efficient k- epsilon turbulence model. The resulting model is computationally efficient and unrestricted to the CFL condition. Computations with and without hydrostatic approximation were compared for the same cases to test the validity of the conventional hydrostatic pressure assumption. The model was verified against analytical solutions and experimental data, with excellent agreement.