How to calculate OSI and WSS?

nainasjdr · March 26, 2014, 14:10

I want to know how to calculate de oscillatory shear index and wall shear stress in openFoam??

nainasjdr · September 17, 2014, 15:05

any one? help me

mohsen cheraghi · September 18, 2014, 12:08

Quote:

Originally Posted by nainasjdr

any one? help me

Hi, you can simply type wallShearStress in terminal, best.

nainasjdr · September 18, 2014, 12:36

yes
The wss it'swork , but do you now how to caulculate de OSI?

mohsen cheraghi · September 18, 2014, 12:45

Quote:

Originally Posted by nainasjdr

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.

wyldckat · September 21, 2014, 12:45

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: http://www.cfd-online.com/Forums/cfx...tml#post500380 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

September 21, 2014, 12:45		#6
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,982 Blog Entries: 45 Rep Power: 128	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: http://www.cfd-online.com/Forums/cfx...tml#post500380 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 __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

March 26, 2014, 14:10	How to calculate OSI and WSS?	#1
nainasjdr New Member Janaína de Andrade Silva Join Date: Mar 2014 Posts: 8 Rep Power: 12	I want to know how to calculate de oscillatory shear index and wall shear stress in openFoam??

September 17, 2014, 15:05		#2
nainasjdr New Member Janaína de Andrade Silva Join Date: Mar 2014 Posts: 8 Rep Power: 12	any one? help me

September 18, 2014, 12:36		#4
nainasjdr New Member Janaína de Andrade Silva Join Date: Mar 2014 Posts: 8 Rep Power: 12	yes The wss it'swork , but do you now how to caulculate de OSI?