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-   -   forceCoeffs (OpenFOAM 2.2.0) gave another values of Cd in comparison results2.2.1 ! (http://www.cfd-online.com/Forums/openfoam-post-processing/114687-forcecoeffs-openfoam-2-2-0-gave-another-values-cd-comparison-results2-2-1-a.html)

lavrov March 15, 2013 10:12

forceCoeffs (OpenFOAM 2.2.0) gave another values of Cd in comparison results2.1.1 !
 
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.


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