Presenter/Author Information

V. Fuka
J. Brechler

Keywords

large eddy simulation, turbulence decay, turbulence simulation

Start Date

1-7-2008 12:00 AM

Description

Implicit Large Eddy Simulation is an emerging tool for turbulence modelling. Insteadof explicitely computing subgrid stress models, numerical dissipation of nonlinear schemes canbe used as a main control mechanism of turbulent energy transfer. In this contribution we testperformance of a high-resolution incompressible projection method in modelling of the Taylor-Green vortex flow, which stands as a prototype of a simple free flow with a transition to turbulenceand a turbulence decay. Several criteria are used to asses the model, including the kinetic energydissipation rate, kinetic energy spectra and probability density functions of velocity gradients.

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Jul 1st, 12:00 AM

Implicit Large Eddy Simulation - a Promising Method for Turbulence Modelling in High Resolution Models

Implicit Large Eddy Simulation is an emerging tool for turbulence modelling. Insteadof explicitely computing subgrid stress models, numerical dissipation of nonlinear schemes canbe used as a main control mechanism of turbulent energy transfer. In this contribution we testperformance of a high-resolution incompressible projection method in modelling of the Taylor-Green vortex flow, which stands as a prototype of a simple free flow with a transition to turbulenceand a turbulence decay. Several criteria are used to asses the model, including the kinetic energydissipation rate, kinetic energy spectra and probability density functions of velocity gradients.