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forceCoeffs (OpenFOAM 2.2.0) gave another values of Cd in comparison results2.2.1 !

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Old   March 15, 2013, 10:12
Default forceCoeffs (OpenFOAM 2.2.0) gave another values of Cd in comparison results2.1.1 !
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Alexander Lavrov
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Deal all,

I solved very simple problem: laminar cylinder (Re=20) in flow using OpenFOAM 2.1.1.
I used blockMesh instrument. (number of cells: 78000)
The cylinder is divided into 8 parts.
I received Cd which coincides with experiment.

Today I run the same problem on OpenFOAM 2.2.0.
The Cd is approximately 4 times smaller. It differs from my previous calculations and from experiment.

I suppose that something have change in the rules concerning forceCoeffs.
But I did not find answer in 2.2.0 manual.

Please help me!
Thank you very much in advance.
Alexander.

Last edited by lavrov; March 15, 2013 at 11:16.
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2.1.1, 2.2.0, cylinder, differences, laminar

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