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**Harvard**

Bensow, R. och Liefvendahl, M. (2008) *Implicit and Explicit Subgrid Modeling in LES Applied to a Marine Propeller*.

** BibTeX **

@conference{

Bensow2008,

author={Bensow, Rickard and Liefvendahl, Mattias},

title={Implicit and Explicit Subgrid Modeling in LES Applied to a Marine Propeller},

booktitle={38th Fluid Dynamics Conference and Exhibit},

abstract={The flow around a four-bladed marine propeller in homogeneous inflow and in non-
cavitating conditions is investigated using Large Eddy Simulation, LES. Explicit, using a
k-equation eddy viscosity model, and implicit subgrid modeling are compared for both the
standard LES formulation as well as a mixed formulation containing the, so called, scale
similarity term. A wall-modeled approach is used on a relatively coarse grid, containing 5.5
million cells, for the full propeller in order to mimic a future applied computation including
the ship hull. The implicit modeling is of particular interest in cavitation simulation, where
the interaction between an explicit subgrid model and the liquid-vapor interface may cause
numerical and modeling problems. All simulations yield fairly similar results, although
the implicit LES gives better prediction of the global performance of the propeller. The
agreement with experimental data is good close to the propeller, but the simulated flow
structures diffuses quickly at the present grid resolution.},

year={2008},

}

** RefWorks **

RT Conference Proceedings

SR Print

ID 86273

A1 Bensow, Rickard

A1 Liefvendahl, Mattias

T1 Implicit and Explicit Subgrid Modeling in LES Applied to a Marine Propeller

YR 2008

T2 38th Fluid Dynamics Conference and Exhibit

AB The flow around a four-bladed marine propeller in homogeneous inflow and in non-
cavitating conditions is investigated using Large Eddy Simulation, LES. Explicit, using a
k-equation eddy viscosity model, and implicit subgrid modeling are compared for both the
standard LES formulation as well as a mixed formulation containing the, so called, scale
similarity term. A wall-modeled approach is used on a relatively coarse grid, containing 5.5
million cells, for the full propeller in order to mimic a future applied computation including
the ship hull. The implicit modeling is of particular interest in cavitation simulation, where
the interaction between an explicit subgrid model and the liquid-vapor interface may cause
numerical and modeling problems. All simulations yield fairly similar results, although
the implicit LES gives better prediction of the global performance of the propeller. The
agreement with experimental data is good close to the propeller, but the simulated flow
structures diffuses quickly at the present grid resolution.

LA eng

OL 30