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**Harvard**

Bensow, R. och Larson, M. (2009) *Residual Based VMS Subgrid Modeling for Vortex Flows*.

** BibTeX **

@article{

Bensow2009,

author={Bensow, Rickard and Larson, Mats G.},

title={Residual Based VMS Subgrid Modeling for Vortex Flows},

journal={Computer Methods in Applied Mechanics and Engineering},

issn={0045-7825},

volume={199},

issue={13-16},

pages={802-809},

abstract={This paper presents a residual based subgrid modeling approach for Large Eddy Simulations (LES) based on the variational multiscale method as a cure for the problem of preservation of vortices in numerical flow simulation. This approach combines a splitting of the non-linear term in the Navier–Stokes equations into strain and vorticity with a residual based modeling of the subgrid problems. The benefit is that certain driving phenomena, normally not present in subgrid modeling, e.g. vortex stretching, can be seen in the equations.
</br></br>
Here, we focus on two of the subgrid terms arising from the subgrid scale problem. The effect of the two terms are illustrated in an LES of a three dimensional flow around a wing where the main feature is the formation and preservation of a tip vortex, an important phenomenon in many aerodynamic and hydrodynamical applications. We see that the addition of the new subgrid terms correctly counteracts the dissipative effect, arising from numerics and turbulence modeling, on the vortex and thus strongly improves prediction of the tip vortex.},

year={2009},

keywords={Finite element; Subgrid modeling; Residual based turbulence modeling; Variational multiscale; Navier–Stokes equations},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 102751

A1 Bensow, Rickard

A1 Larson, Mats G.

T1 Residual Based VMS Subgrid Modeling for Vortex Flows

YR 2009

JF Computer Methods in Applied Mechanics and Engineering

SN 0045-7825

VO 199

IS 13-16

SP 802

OP 809

AB This paper presents a residual based subgrid modeling approach for Large Eddy Simulations (LES) based on the variational multiscale method as a cure for the problem of preservation of vortices in numerical flow simulation. This approach combines a splitting of the non-linear term in the Navier–Stokes equations into strain and vorticity with a residual based modeling of the subgrid problems. The benefit is that certain driving phenomena, normally not present in subgrid modeling, e.g. vortex stretching, can be seen in the equations.
</br></br>
Here, we focus on two of the subgrid terms arising from the subgrid scale problem. The effect of the two terms are illustrated in an LES of a three dimensional flow around a wing where the main feature is the formation and preservation of a tip vortex, an important phenomenon in many aerodynamic and hydrodynamical applications. We see that the addition of the new subgrid terms correctly counteracts the dissipative effect, arising from numerics and turbulence modeling, on the vortex and thus strongly improves prediction of the tip vortex.

LA eng

DO 10.1016/j.cma.2009.08.004

LK http://dx.doi.org/10.1016/j.cma.2009.08.004

OL 30