time and time step variable in new turbulence model

delsolman · May 9, 2016, 16:40

Hello guys, could you help me please...

I am trying to get work a PANS turbulence model in OpenFOAM.
For this model I need ensemble averaging of UMean inside of the turbulence model code which works over restart.

I would like to average over time and use Time and deltaT for this.

Do you have any idea, how can I get the variables of Time and deltaT to my turbulence model please?

Many thanks for your help!

HelioVillanueva · May 9, 2016, 23:40

Hi Lukas, I implemented this methodology for the kEpsilon and kOmegaSST already. Take a look here http://www.cfd-online.com/Forums/ope...ce-models.html
The link with the codes are there. See if they help

delsolman · May 11, 2016, 15:16

Hello Helio,
as I can see you don't use for fk the k-total, but only k-unresolved.
Because of that, you don't need the online averaging of UMean which would gives you k-resolved to compute fk properly.

What you are doing is not PANS. sorry
Thank you anyway for your comment.

benqing · April 1, 2018, 21:44

hi Lukas ,

did you solve this problem?
or how did you compute fk in openfoam ? i am working on pans too .

regards,
benqing

May 9, 2016, 16:40	time and time step variable in new turbulence model	#1
delsolman New Member Lukas Kutej Join Date: Jan 2016 Location: Darmstadt Posts: 20 Rep Power: 10	Hello guys, could you help me please... I am trying to get work a PANS turbulence model in OpenFOAM. For this model I need ensemble averaging of UMean inside of the turbulence model code which works over restart. I would like to average over time and use Time and deltaT for this. Do you have any idea, how can I get the variables of Time and deltaT to my turbulence model please? Many thanks for your help!

May 9, 2016, 23:40	Pans	#2
HelioVillanueva New Member Helio Villanueva Join Date: Apr 2013 Location: Brazil Posts: 14 Rep Power: 13	Hi Lukas, I implemented this methodology for the kEpsilon and kOmegaSST already. Take a look here http://www.cfd-online.com/Forums/ope...ce-models.html The link with the codes are there. See if they help

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May 11, 2016, 15:16		#3
delsolman New Member Lukas Kutej Join Date: Jan 2016 Location: Darmstadt Posts: 20 Rep Power: 10	Hello Helio, as I can see you don't use for fk the k-total, but only k-unresolved. Because of that, you don't need the online averaging of UMean which would gives you k-resolved to compute fk properly. What you are doing is not PANS. sorry Thank you anyway for your comment.

April 1, 2018, 21:44		#4
benqing New Member benqing Liu Join Date: Sep 2017 Posts: 8 Rep Power: 9	hi Lukas , did you solve this problem? or how did you compute fk in openfoam ? i am working on pans too . regards, benqing