OpenFOAM LES: Averaging Velcoity

Ollie · April 18, 2011, 08:30

Hi,

In Openfoam for LES I know that you can implement a function in the controlDict file which calculates average velocity at each point based on all the time steps. If this is not implemented before the simulations begins, is there a way to do this now the simulation has finished ? FoamCalc perhaps?

regards

Ollie

gregor · April 19, 2011, 04:16

Hi Ollie,

for run time averaging: have a look at the fieldAverage function
http://foam.sourceforge.net/doc/Doxy....html#_details
http://www.cfd-online.com/Forums/ope...ldaverage.html
gregor
PS: sorry i misunderstood your post. i am not aware of an existing post pro averaging tool. but writing your own shouldn't be too hard.

longamon · April 20, 2011, 07:05

Check this thread

http://www.cfd-online.com/Forums/ope...rocessing.html

The only problem I found with this postaverage utility is it only uses the time data you saved, opposed to the fieldaverage function in run time that uses all timestep data.

April 18, 2011, 08:30	OpenFOAM LES: Averaging Velcoity	#1
Ollie New Member Join Date: Jan 2011 Posts: 6 Rep Power: 16	Hi, In Openfoam for LES I know that you can implement a function in the controlDict file which calculates average velocity at each point based on all the time steps. If this is not implemented before the simulations begins, is there a way to do this now the simulation has finished ? FoamCalc perhaps? regards Ollie

April 19, 2011, 04:16		#2
gregor Member Gregor Olenik Join Date: Jun 2009 Location: http://greole.github.io/ Posts: 89 Rep Power: 17	Hi Ollie, for run time averaging: have a look at the fieldAverage function http://foam.sourceforge.net/doc/Doxy....html#_details http://www.cfd-online.com/Forums/ope...ldaverage.html gregor PS: sorry i misunderstood your post. i am not aware of an existing post pro averaging tool. but writing your own shouldn't be too hard. Last edited by gregor; April 21, 2011 at 03:32.

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April 20, 2011, 07:05		#3
longamon Member David Aljure Join Date: Mar 2011 Location: CTTC Universidad Politécnica de Catalunya. Spain Posts: 38 Rep Power: 16	Check this thread http://www.cfd-online.com/Forums/ope...rocessing.html The only problem I found with this postaverage utility is it only uses the time data you saved, opposed to the fieldaverage function in run time that uses all timestep data.