Geodesic
Towards lagrangian large vortex simulation
John R. Mansfield1 ; Omar M. Knio1 ; Charles Meneveau1
1 Department of Mechanical Engineering The Johns Hopkins University Baltimore, MD 21218, USA
ESAIM. Proceedings, Tome 1 (1996), pp. 49-64 Cet article a éte moissonné depuis la source EDP Sciences

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Construction of a Lagrangian large-eddy-simulation scheme is performed based on filtering the vorticity transport equation and using simple eddy-diffusivity models to account for subgrid-scale "Helmholtz" stresses. The resulting governing equations are simulated using a three-dimensional particle method which discretizes the vorticity field into Lagrangian vortex elements of finite overlapping cores. Vortex elements are transported along particle trajectories, while their vorticities evolve according to stretching and tilting by the resolved scales, molecular diffusion, and subgrid-scale stresses. The behavior of the model is discussed in light of limited three-dimensional computations of transitional vortex rings. It is shown that the model can capture the large-scale features of the flow without requiring an excessively large number of elements.
DOI : 10.1051/proc:1996019

John R. Mansfield 1 ; Omar M. Knio 1 ; Charles Meneveau 1

1 Department of Mechanical Engineering The Johns Hopkins University Baltimore, MD 21218, USA 
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John R. Mansfield; Omar M. Knio; Charles Meneveau. Towards lagrangian large vortex simulation. ESAIM. Proceedings, Tome 1 (1996), pp. 49-64. doi: 10.1051/proc:1996019

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