getting (0 0 0) wallGradU value when i m probing wallGradU at some points

suryawanshi_nitin · June 18, 2012, 17:11

Dear friends my simulation is flow over a flat plate using LES in of210 and wants to find out wallGradU at some point wall (within 1st cell near to wall). First i have extracted wallGradU field for domain and then by using probeLocations option i m extracting wallGradU at required point locations but getting (0,0,0) value and my all points are within fisrt cell height.....plzzzhelp me on this...am i missing some data extraction???

(Direct wallShearStress option is not working for LES model so i m going to find out first dU/dY and then wall Shear Sterss by rho*nu*dU/dy)..)

Thanks in advance
Nitin Suryawanshi.

kmou · December 9, 2013, 11:36

Hi Nitin,

I have a very similar problem, I am simulating a flow over a flat plate with interFoam (laminar) and I want wallGradU but it is zero everywhere.
Did you resolve your problem?
Did you instead calculated dU/dy yourself, and if yes how?
Thank you very much for your help.
Camille

June 18, 2012, 17:11	getting (0 0 0) wallGradU value when i m probing wallGradU at some points	#1
suryawanshi_nitin New Member Nitin Suryawanshi Join Date: Mar 2009 Location: Pune, India Posts: 28 Rep Power: 17	Dear friends my simulation is flow over a flat plate using LES in of210 and wants to find out wallGradU at some point wall (within 1st cell near to wall). First i have extracted wallGradU field for domain and then by using probeLocations option i m extracting wallGradU at required point locations but getting (0,0,0) value and my all points are within fisrt cell height.....plzzzhelp me on this...am i missing some data extraction??? (Direct wallShearStress option is not working for LES model so i m going to find out first dU/dY and then wall Shear Sterss by rhonudU/dy)..) Thanks in advance Nitin Suryawanshi.

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December 9, 2013, 11:36		#2
kmou Member Camille Bilger Join Date: Jul 2013 Posts: 43 Rep Power: 12	Hi Nitin, I have a very similar problem, I am simulating a flow over a flat plate with interFoam (laminar) and I want wallGradU but it is zero everywhere. Did you resolve your problem? Did you instead calculated dU/dy yourself, and if yes how? Thank you very much for your help. Camille