Abstract
The effect of choice of cell face velocities on the solution behaviours in the three dimensional incompressible flow calculations on nonorthogonal grids are investigated in detail. The calculation schemes based on the curvilinear contravariant and covariant cell face velocities are developed and are applied to the test problems to assess their relative performances. It is observed that the accuracy of the converged solution is not affected by the different choice of cell face velocities. However, the scheme based on the covariant cell face velocities shows better convergence behaviours when the numerical grids are strongly nonorthogonal.
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