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New Member
Join Date: Mar 2021
Posts: 8
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Hello FOAMers,
I've searched the forum but couldn't find direct answer (for now). I'm trying to perform channel flow validation based on Channel395 tutorial case. I receive consistent results in case of velocity profile and turbulent kinetic energy. There is one issue, Once I obtain wall shear stress value by postprocessing to evaluate Utau and the rest, I perform averaging for walls (at the top and bottom) first and that use it for calculations. I noticed that wall shear stress (average) is changing significantly if I choose different time step. According to my observations Retau becomes something around 400 and 370 (there is something odd) How should I evaluate wall shear stress? If I perform sampling for ex. for 100 different time steps same thing happens. I read that one can use pressure gradient on log file in another thread, Is anyone did this before? LES of turbulent channel flows |
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Thread | Thread Starter | Forum | Replies | Last Post |
Wall shear stress for solid phase? | qi.yang@polimi.it | OpenFOAM Programming & Development | 0 | February 24, 2020 06:26 |
To calculate wall shear stress in of210 for les simulation | suryawanshi_nitin | OpenFOAM Post-Processing | 44 | August 3, 2018 13:01 |
Water subcooled boiling | Attesz | CFX | 7 | January 5, 2013 03:32 |
shear stress scalar definitions? | Novak Elliott | CFX | 0 | April 6, 2003 01:45 |
WALL SHEAR STRESS | Min-Hua Wang | CFX | 0 | April 3, 2002 17:40 |