The use of detached eddy simulation in ship hydrodynamics

Pattenden, R.J., Turnock, S.R. and Bressloff, N.W. (2004) The use of detached eddy simulation in ship hydrodynamics. 25th Symposium on Naval Hydrodynamics, St. Johns, Canada. pp. 1-19 .

Record type: Conference or Workshop Item (Paper)

Abstract

Accurate numerical simulation of the flow around the hull of a ship remains a challenging task. This work examines whether this is as a result of the inherent unsteady turbulent flow regime influencing the position and strength of vortex systems shed in the wake. To this end the behaviour of the flow around a truncated cylinder is taken as an exemplar of flow at the stern of a ship. Wind tunnel tests of the flow around a KVLCC2 hull form were made to measure the flow field at the propeller plane using particle image velocimetry. Comparison of the instantaneous and the mean flow field indicate significant low frequency effects with large deviations form the mean flow. Such behaviour is also found in the wake of an aspect ratio 1 truncated cylinder. The approach at capturing the on and off body flow field is compared with detailed experiments and previous calculations of a Reynolds Averaged Navier Stokes with k-e model and Large Eddy Simulation (LES). THe results clearly show significant improvements with the use of DES. Further work is on-going to apply the DES approach to a full ship simulation.

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