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How to calculate OSI and WSS?

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Old   March 26, 2014, 14:10
Default How to calculate OSI and WSS?
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Janaína de Andrade Silva
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I want to know how to calculate de oscillatory shear index and wall shear stress in openFoam??
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Old   September 17, 2014, 14:05
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Janaína de Andrade Silva
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any one? help me
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Old   September 18, 2014, 11:08
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mohsen cheraghi
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Quote:
Originally Posted by nainasjdr View Post
any one? help me
Hi, you can simply type wallShearStress in terminal, best.
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Old   September 18, 2014, 11:36
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Janaína de Andrade Silva
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yes
The wss it'swork , but do you now how to caulculate de OSI?
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Old   September 18, 2014, 11:45
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mohsen cheraghi
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Quote:
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yes
The wss it'swork , but do you now how to caulculate de OSI?
Unfortunately not . But, I'm sure that there is not a keyword and you should do modification.

Last edited by mohsen cheraghi; September 21, 2014 at 16:13.
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Old   September 21, 2014, 11:45
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Bruno Santos
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Greetings to all!

@nainasjdr: Oscillatory Shear Index isn't a very common index in the CFD world, at least not nearly as common as Wall Shear Stress. If you had taken this into account and had provided more details on what you were asking about, someone would likely had taken the time to give you an answer a long time ago .

I've done a quick search in Google with the following expression:
Code:
site:www.cfd-online.com oscillatory shear index openfoam
Among the results was this thread: Oscillatory Shear Index Calculation post #5 - in post #1 is the actual expression.
There you can find instructions on how to calculate the OSI. From the description on that post, this isn't available yet in OpenFOAM. It's also suggested that an outside tool is more easily used for the actual calculations.

Further instructions/suggestions can be provided, depending on how you want to proceed.

Best regards,
Bruno
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