Publications

Ahmed, Y., Ciortan, C. and Guedes Soares, C. (2006), “Free Surface Flow Simulation around a Wigley Hull Using a Slightly Compressible Flow Formulation and a Two-Phase Fluid Approach”, Proceedings of the 8th International Conference on Marine Sciences and Technologies (Black Sea´06), 25-27 Setembro, Varna, Bulgaria

The free-surface flow around a Wigley hull form has been simulated using a compressible code utilizing a Slightly Compressible Flow formulation, and a commercial code, using the two-phase Eulerian-Eulerian fluid approach. Three turbulence models (Large Eddy Simulation, Baldwin-Lomax and standard k - å) are used and compared. The simulation conditions are the ones for which experimental and numerical results exist. The computational grid in the compressible code is built using an algebraic grid generator with the model fixed in space, while the grid generator of the commercial code has been used for generating the unstructural tetrahedral computational grids required for the later solver. The compressible code uses the interface-capturing technique for computing the free surface displacements and the Beam & Warming scheme for marching in time the numerical model. The commercial code uses the fluid concentration in a volume-of- fluid method to determine the free-surface around the hull. The results compare well with the experimental data available.

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