Wall damping function in Fluent using LES with standard smagorinsky sgs model (Cs=1)

lxlylzl · April 6, 2017, 08:16

Dear all,

Recently I have started using LES turbulence model for highly swirling flow using LES with standard smagorinsky sgs model (Cs=1). In my study, the centroid of the wall-adjacent cell falls within logarithmic region of boundary layer, and the law-of-the-wall is employed.

However, I am unable to find the documents related to the wall-damping function used in Fluent using LES with standard smagorinsky subgrid-scale model (Cs = 1). Kindly help me on this, and any reference would be a warm welcome.

lxlylzl · April 10, 2017, 02:11

Any body, please help........

Any information/reference to the above will be highly appreciated.

sbaffini · April 10, 2017, 06:46

The Theory guide has all you need to know about the implementation.

https://www.sharcnet.ca/Software/Ans...1-1910005.22.3

lxlylzl · April 12, 2017, 09:53

Dear sbaffini,

Thank you for the link.

gfy001 · October 13, 2018, 19:35

In standard Smagorinsky-Lilly model, the sub-grid eddy viscosity is damped using a combination of a mixing length minimum function proportional to the wall normal distance and a viscosity damping function.
See: https://www.sharcnet.ca/Software/Ans...bLargSubg.html

April 6, 2017, 08:16	Wall damping function in Fluent using LES with standard smagorinsky sgs model (Cs=1)	#1
lxlylzl Member Join Date: Jul 2012 Posts: 49 Rep Power: 14	Dear all, Recently I have started using LES turbulence model for highly swirling flow using LES with standard smagorinsky sgs model (Cs=1). In my study, the centroid of the wall-adjacent cell falls within logarithmic region of boundary layer, and the law-of-the-wall is employed. However, I am unable to find the documents related to the wall-damping function used in Fluent using LES with standard smagorinsky subgrid-scale model (Cs = 1). Kindly help me on this, and any reference would be a warm welcome.

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April 10, 2017, 02:11		#2
lxlylzl Member Join Date: Jul 2012 Posts: 49 Rep Power: 14	Any body, please help........ Any information/reference to the above will be highly appreciated.

April 10, 2017, 06:46		#3
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,195 Blog Entries: 29 Rep Power: 39	The Theory guide has all you need to know about the implementation. https://www.sharcnet.ca/Software/Ans...1-1910005.22.3

April 12, 2017, 09:53		#4
lxlylzl Member Join Date: Jul 2012 Posts: 49 Rep Power: 14	Dear sbaffini, Thank you for the link.

October 13, 2018, 19:35		#5
gfy001 New Member Feiyu Join Date: Oct 2015 Posts: 4 Rep Power: 11	In standard Smagorinsky-Lilly model, the sub-grid eddy viscosity is damped using a combination of a mixing length minimum function proportional to the wall normal distance and a viscosity damping function. See: https://www.sharcnet.ca/Software/Ans...bLargSubg.html