Publications

Ahmed, Y. and Guedes Soares, C. (2009), “Simulation of Free Surface Flow around a VLCC Hull using Viscous and Potential Flow Methods”, Ocean Engineering, Vol. 36, Issues 9-10, pp. 691-696

Numerical simulations have been carried out to determine the incompressible free surface flow around a VLCC hull form for which experimental results are available. A commercial finite volume code using the two-phase Eulerian-Eulerian fluid approach and a potential flow code based on the Rankine source method have been used in this study. The simulations conditions are the ones for which experimental results exist. The Shear Stress Transport model (SST) turbulence model has been used in the commercial code. A tetrahedral unstructured grid was used with the commercial code for meshing the computational domain, while quadrilateral structural patches were used with the potential flow code for meshing the VLCC hull surface and the water surface around it. The results compare well with the available experimental data and they allow an understanding of the differences that can be expected from viscous and potential flow methods as a result of their different mathematical formulations. It is demonstrated that the complementary application of these methods allows good predictions of the total ship resistance.

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