Abstract
This work focuses on the numerical simulation of the interaction between the draft tube and tailwater flow in low head hydro power plants. An approach to the solution of incompressible free surface flow problems is developed. The flow field and the free surface location are calculated by coupling the free surface kinematic and dynamic conditions with the equations of motion for the bulk flow. A pressure correction method is applied to the flow calculation in a moving grid system. The RNG k-ε model is used for turbulence modelling. In order to reduce the computational time, the PVM (Parallel Virtual Machine) subroutines are implemented.
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