[OpenFOAM] Average Velocity

mrj301988 · January 16, 2009, 06:32

how can i find average velocity of a particular time directory?plz do tell me as i am a beginner and using version 1.5 of OpenFOAM

ep4 · January 16, 2009, 06:45

Hi,

the utility patchAverage gives you the average of each velocity component Ux, Uy and Uz.
To obtain these components from the vector U: foamCalc components U
Then you calculate the average on one patch with the patchAvearge utility.
patchAverage (U component) (patch name) -time (time directory you are interested in)

Hope it can help you

Eric

mrj301988 · January 16, 2009, 06:52

hi Eric thanks for your advice
It worked

mrj301988 · January 22, 2009, 00:18

hi,what is the procedure if in lid driven cavity, velocity varies between 1-2 m/s,what r the changes in 0 folder for U,if anyone knows then kindly inform me

Subodh · June 1, 2009, 23:13

Hi Guys,

Is there any way to find average velocity from sampled data. I need to do this because of two reason.

My sampled data is not for a patch. I am sampling data for a plane
I want to convert sampled data to cylindrical co-ordinate and then calculate average of velocity in cylindrical coordinate

Thanks in advance
Subodh

January 16, 2009, 06:32	Average Velocity	#1
mrj301988 New Member Mat Join Date: Mar 2009 Location: Mumbai, Maharashtra, India Posts: 20 Rep Power: 17	how can i find average velocity of a particular time directory?plz do tell me as i am a beginner and using version 1.5 of OpenFOAM

January 16, 2009, 06:45	Hi, the utility patchAverag	#2
ep4 Member Pattyn Eric Join Date: Mar 2009 Posts: 61 Rep Power: 17	Hi, the utility patchAverage gives you the average of each velocity component Ux, Uy and Uz. To obtain these components from the vector U: foamCalc components U Then you calculate the average on one patch with the patchAvearge utility. patchAverage (U component) (patch name) -time (time directory you are interested in) Hope it can help you Eric utkunun likes this.

January 16, 2009, 06:52	hi Eric thanks for your advice	#3
mrj301988 New Member Mat Join Date: Mar 2009 Location: Mumbai, Maharashtra, India Posts: 20 Rep Power: 17	hi Eric thanks for your advice It worked

January 22, 2009, 00:18	hi,what is the procedure if in	#4
mrj301988 New Member Mat Join Date: Mar 2009 Location: Mumbai, Maharashtra, India Posts: 20 Rep Power: 17	hi,what is the procedure if in lid driven cavity, velocity varies between 1-2 m/s,what r the changes in 0 folder for U,if anyone knows then kindly inform me

June 1, 2009, 23:13		#5
Subodh New Member Subodh Kumar Join Date: Apr 2009 Location: India Posts: 9 Rep Power: 17	Hi Guys, Is there any way to find average velocity from sampled data. I need to do this because of two reason. My sampled data is not for a patch. I am sampling data for a plane I want to convert sampled data to cylindrical co-ordinate and then calculate average of velocity in cylindrical coordinate Thanks in advance Subodh

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