NUMERICAL SOLUTIONS OF REYNOLDS-AVERAGED NAVIER-STOKES EQUATIONS FOR 3-D TURBULENT FLOW OVER CONCAVE SURFACES OF DISCHARGING STRUCTURES

摘要

This paper is conserned with a numerical method for the solution of com- plete Reynolds-averaged Navier-Stokes equations for three-dimensional flows over the con- cave surfaces of discharging structures. A non-orthogonal body-fitted coordinate system was used to deal with the complex physical geometry, and finite volume method (FVM) was employed to solve the convective transport equations for mean velocities and turbu- lence parameters (k, ε). It is indicated through the numerical example that the calculat- ed results are in good agreement with the experimental ones, and it is also proved that this numerical method used to predict the characteristics of turbulent flow over the concave surface of discharging structures is feasible.