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-   -   Which Foam for vortex shedding problem (http://www.cfd-online.com/Forums/openfoam/89188-foam-vortex-shedding-problem.html)

Madeleine P. Vincent June 7, 2011 09:03

Which Foam for vortex shedding problem
 
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.

flowris June 7, 2011 13:43

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.

vkrastev June 8, 2011 05:58

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.

naveen June 8, 2011 06:09

Which Foam for vortex shedding problem
 
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

uli June 16, 2012 06:58

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

flowris June 18, 2012 01:45

Both icoFoam and pimpleFoam can do simulations, and you can chose from a whole range of turbulence models in constant/turbulenceProperties.

uli July 14, 2012 17:58

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
http://www.cfd-online.com/Forums/mai...frequency.html
maybe we can continue the vortex shedding topic there.

Uli


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