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Which Foam for vortex shedding problem

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Old   June 7, 2011, 09:03
Default Which Foam for vortex shedding problem
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Madeleine P. Vincent
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Hi all,

if I were interested in modeling vortex shedding behind a cylinder in incompressible flow, which Foam is best to use?

The Re will vary from 60 to 10,000.

Thanks,
Maddy.
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Old   June 7, 2011, 13:43
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You can start with icoFoam, the basic solver for incompressible flow. A more important question is the turbulence model you will use. There are numerous models, you can find more info on http://www.cfd-online.com/Wiki/Turbulence_modeling, but I suggest you also find a good textbook.
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Old   June 8, 2011, 05:58
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Vesselin Krastev
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icoFoam for lower Reynolds number, pisoFoam or pimpleFoam for higher Reynolds number. However, have in mind that in this Reynolds number range (up to 10000) the flow exhibits a mixed laminar-turbulent behavior which is quite difficult to capture properly with standard RANS turbulence models. I have some experience at higher Reynolds numbers (from 1E05 to 3.6E06) and for such a flow regime some unsteady RANS models do a pretty good job in predicting vortex shedding frequencies and time-averaged drag values.

Regards

V.
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Old   June 8, 2011, 06:09
Default Which Foam for vortex shedding problem
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NAVEEN.K.M
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hi all,

Use icoFoam for Re ranging from 0-300 and turbFoam or pimpleFoam for Re ranging from 300-20000 with SA Model or k-epsilon.


Regards

NAVEEN
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Old   June 16, 2012, 06:58
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uli
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hi all

I am interested in vortex shedding at high Reynolds numbers (20.000 to 90.000). I found out that the solver turbfoam is no longer available in OF versions 1.6 and newer (I work with OF 1.7.x).

I am new to openFOAM so any help and explanation is appreciated.

best
Uli
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Old   June 18, 2012, 01:45
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Both icoFoam and pimpleFoam can do simulations, and you can chose from a whole range of turbulence models in constant/turbulenceProperties.
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Old   July 14, 2012, 17:58
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hi all,

since icoFoam is a solver for laminar flows I did simulations with pimpleFoam and pisoFoam, which produced similar results.

For any further suggestions see
Vortex shedding frequency
maybe we can continue the vortex shedding topic there.

Uli
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