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Publications
Fonfach, J.M.A. and Guedes Soares, C. (2010), “Improving the Resistance of a series 60 vessel with a CFD Code”, Proceedings of the V European Conference on Computational Fluid Dynamics (CFD 2010), Pereira, J. C. F and Sequeira, A. (Eds.), 14-17 June, Lisbon, Portugal, pp. 1-14
An hydrodynamic study was carried out, of a series 60 vessel model, using a CFD RANS (Reynolds Averaged Navier-Stokes Equations) based code, with the aim of calculating the pressure gradient and shear stresses of the flow around the vessel, and the associated wave train generated at the interface of two fluids (free Surface), for Froude numbers in the range of 0.18 to 0.34. The data were validated with previous published experimental tests. Different mesh size were used in the present study to determinate the most appropriate one. The use of a zone with turbulent properties is a fundamental aspect in viscous flow simulation. For the solution of the governing equations two turbulence models for the turbulent viscosity are evaluated. They are: Shear Stress Transport (SST) and the K-å model. Subsequent to obtaining these results, a study to optimize the hydrodynamic resistance was conducted, so that the hull of the ship was modified by adding a bow bulb, which were analyzed with two different lengths, obtaining the best alternative.
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