Analysis of U-Type Anti-Roll Tanks using URANS. Sensitivity and Validation

AuthorsKerkvliet, M., Vaz, G., Carette, N., Gunsing
Conference/JournalOMAE ASME 33rd International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, CA
DateJun 8, 2014

The present paper focuses on the sensitivityand validation of the anti-roll performances of passive U-type ART using CFD. For this, the incompressible Unsteady Reynolds Averaged Navier-Stokes (URANS) code ReFRESCOwas used. The sensitivity on the results for the U-tank is analysed by varying the grid resolution and the numerical time step. The two-dimensional (2D) full-scale and Froude based model-scaleReFRESCO results are compared to 2D and 3D full-scale CFD results of Delaunay (2012) [1] and Thanyamanta and Molyneux (2012) [2] and validated with model-scale experimental results ofField and Martin (1975) [3] and MARIN experimental results by Gunsing et al. (2014) [4]. This paper shows the influence of the convective scheme for capturing the free-surface interface and provides recommendations for a time step and grid resolution to effectively calculate the roll damping of an ART.

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