Grid generation for wall-modelled les of ship hydrodynamics in model scale

• An unstructured grid generation approach for wall-modelled LES is proposed. The applicability of the approach is demonstrated for the simulation of the flow around an axisymmetric body, at Re-number 5.48·106, which is representable of model scale ship hydrodynamics. A numerical trip wire must be employed to induce resolved fluctuations in the simulated boundary layer. The predictive accuracy of the simulation technique is evaluated for the flow around the axisymmetric body, and for the computation of a turbulent boundary layer on a flat plate. For the flat plate, comparison is made with results from direct numerical simulation. For the axisymmetric body, results from wall-modelled LES, RANS and experimental measurements are compared. 

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

Nyckelord

Boundary layer flow; Boundary layers; Hydrodynamics; Large eddy simulation; Marine engineering; Mesh generation; Ships

Axisymmetric bodies; Grid generation; Model scale; Predictive accuracy; Ship hydrodynamics; Simulation technique; Turbulent boundary layers; Unstructured grid

Computational methods

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