|November 24, 2016, 18:17||
Wall Shear Stress prediction varies with fix y+
Join Date: Jan 2015
Location: United Kingdom
Posts: 38Rep Power: 3
Let say I have a very simple rectangular duct. For flow development I develop the flow using 1000mm long channel and save the velocity profile xyz component and k-e at 80% of the duct. Recycle 4 times.
By measuring the wall shear stress, it shows that the shear stress is very consistent (straight line).
But when I imported to a shorter duct 70 mm (actual working duct)
with same input profile (xyz velocity, k -e).
The wall shear stress seems to be different. Why isn't it possible to maintain the same consistency. The y+ is the same. However, the cells in normal direction especially the cores varies for instances (50 cells, 40 cells, and 30 cells).
Could someone tell me if how wall shear stress achieve mesh independency? Is it possible to achieve absolute wall shear stress? just like the long duct.
|Thread||Thread Starter||Forum||Replies||Last Post|
|different order for wall shear stress result in steady & unsteady simulatiom||raminostadi||FLUENT||0||October 1, 2016 11:23|
|Wall shear stress in channel flow||sreeyuth||OpenFOAM Running, Solving & CFD||2||September 5, 2014 10:02|
|Accessing wall shear stress using UDF||Robert||Fluent UDF and Scheme Programming||2||July 31, 2013 08:34|
|What is wall shear stress and shear strain rate?||warlocklw||Main CFD Forum||2||May 21, 2012 06:16|
|Specifying shear stress on wall in 5.5.1||michael rasmussen||CFX||1||May 19, 2003 09:49|