LES Dynamic Smagorinsky Values

heisenmech · October 2, 2018, 08:53

Hi everyone,

I was wondering if there is any way of checking how smagorinsky constant varies (contour etc.) within a domain when dynamic smagorinsky approach is applied?

CeesH · October 2, 2018, 10:05

It's an output of FLUENT (I think you can find it under turbulence in the in-fluent visualization options). You can certainly make contour plots and so on, and if you prefer to use other post-processing tools I am sure you can export it too -just may not be a default value.

heisenmech · October 2, 2018, 16:49

Hi Cees,

Thanks for the reply. I've looked into it but had no luck. How can we get the dynamic Cs values if they're not there by default?

Thanks

LuckyTran · October 4, 2018, 13:57

It is under turbulence category. In the GUI it's called "subgrid dynamic viscosity cont"

It is not a default export variable. To export it, in the gui you would go to run calculation=> data file quantities and then check it under additional quantities.Then this quantity will be saved and can be imported by your favorite post-processor. Takes only a few button clicks and 1 minute to do.

October 2, 2018, 08:53	LES Dynamic Smagorinsky Values	#1
heisenmech Member Oguzhan Join Date: Aug 2017 Posts: 38 Rep Power: 9	Hi everyone, I was wondering if there is any way of checking how smagorinsky constant varies (contour etc.) within a domain when dynamic smagorinsky approach is applied?

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October 2, 2018, 10:05		#2
CeesH Senior Member Cees Haringa Join Date: May 2013 Location: Delft Posts: 607 Rep Power: 0	It's an output of FLUENT (I think you can find it under turbulence in the in-fluent visualization options). You can certainly make contour plots and so on, and if you prefer to use other post-processing tools I am sure you can export it too -just may not be a default value.

October 2, 2018, 16:49		#3
heisenmech Member Oguzhan Join Date: Aug 2017 Posts: 38 Rep Power: 9	Hi Cees, Thanks for the reply. I've looked into it but had no luck. How can we get the dynamic Cs values if they're not there by default? Thanks

October 4, 2018, 13:57		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,761 Rep Power: 66	It is under turbulence category. In the GUI it's called "subgrid dynamic viscosity cont" It is not a default export variable. To export it, in the gui you would go to run calculation=> data file quantities and then check it under additional quantities.Then this quantity will be saved and can be imported by your favorite post-processor. Takes only a few button clicks and 1 minute to do.