The results show, that it is possible to simulate pressure and velocity with moving meshes. But the results also show that turbulent fluctuations in the measurements because of micro scaled vortices cannot be computed with the k-ε turbulence model used in this study. But this has no influence on the result quality. If necessary for other problems the grid resolution can be increased. Given only the specification of pressure as boundary conditions, the RANSE model, together with a moving mesh subroutine for the moving valve, is capable of computing time-varying flow rates and velocity distribution even in the vena contracta. A computational model can be especially useful in areas where measurements are not possible. Accurate calculation of discharge coefficients would require that this model be extended to include the entire lock culvert system and the moving free surface in the lock chamber. This study shows the promising future of computational application to complicated flow systems with free surface flows and/or moving structures.
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