Field averaging in a certain time interval

misakagan · December 9, 2009, 06:59

Greetings.

As a quite new OpenFOAM user I am on a task to simulate turbulent round jets, for which I am using LES with dynamic Smagorinsky model.

My question is about the sampling of the turbulent data. I could not find how field averages for a certain time interval are done. As expected, I would like to collect statistics after the jet develops entirely into the region, i.e. not starting from the first time step.

Any helps will be appreciated.

misakagan · December 11, 2009, 06:39

Maybe giving an example would help to gather some information.

I want to study Umean between times 200-500 for example, since the interval 0-200 is reserved for the developing of the flow. As far as I can see OpenFOAM does the averaging only for the time interval 0-500, as the averaging starts from the first time step and ends with the final time step.

Anyone knows a solution? Do I need to implement new code?

December 9, 2009, 06:59	Field averaging in a certain time interval	#1
misakagan New Member Join Date: Nov 2009 Posts: 17 Rep Power: 17	Greetings. As a quite new OpenFOAM user I am on a task to simulate turbulent round jets, for which I am using LES with dynamic Smagorinsky model. My question is about the sampling of the turbulent data. I could not find how field averages for a certain time interval are done. As expected, I would like to collect statistics after the jet develops entirely into the region, i.e. not starting from the first time step. Any helps will be appreciated.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
PostChannel	maka	OpenFOAM Post-Processing	5	July 22, 2009 10:15
Computational time	sunnysun	OpenFOAM Running, Solving & CFD	5	March 16, 2009 04:32
AMG versus ICCG	msrinath80	OpenFOAM Running, Solving & CFD	2	November 7, 2006 16:15
Terrible Mistake In Fluid Dynamics History	Abhi	Main CFD Forum	12	July 8, 2002 10:11
unsteady calcs in FLUENT	Sanjay Padhiar	Main CFD Forum	1	March 31, 1999 13:32

December 11, 2009, 06:39		#2
misakagan New Member Join Date: Nov 2009 Posts: 17 Rep Power: 17	Maybe giving an example would help to gather some information. I want to study Umean between times 200-500 for example, since the interval 0-200 is reserved for the developing of the flow. As far as I can see OpenFOAM does the averaging only for the time interval 0-500, as the averaging starts from the first time step and ends with the final time step. Anyone knows a solution? Do I need to implement new code?