A Parallel Unsteady RANS Code for the Numerical Simulations of Free Surface Flows

The parallel code developed at INSEAN for the numerical simulations of unsteady free surface flows is presented in this paper; two test cases are considered as examples of applications and to analyze the performances of the parallel implementation. In the first, the turbulent flow past a circular cylinder is simulated; the Reynolds number is 50,000, the flow is computed in the framework of the Detached-EddySimulations. In the latter, the flow around a ship hull with a practical hull form in a prescribed ”pure sway” manoeuvre is presented; free surface effects are taken into account. For both tests, results are compared with both experimental and numerical data, code performances are evaluated by the measurement of the speed up factors and by a preliminary analysis of the required CPU time.

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