CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Log-law and the first node from the wall

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   September 18, 2014, 05:24
Default Log-law and the first node from the wall
Senior Member
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 521
Rep Power: 16
siw will become famous soon enough

When simulating a wall-bounded flow with the first node inside the log-layer (i.e. 30 < y+ < 300), so that a wall function is used, does this mean that the velocity at this first node (or cell depending on the solver) is calculated by the log-law equation and not by the RANS + turbulence model equations? And it is then at the second node from the wall that uses the RANS + turbulence model with the first node velocity contributing to the answer in the same manner that when using a y+ <1, so that the first node is in the viscous sub-layer, the RANS + turbulence model equations are being used at this location with the no-slip condition wall velocity contributing to the answer?

siw is offline   Reply With Quote

Old   September 18, 2014, 13:58
Senior Member
Join Date: May 2010
Posts: 160
Rep Power: 9
duri is on a distinguished road
yes, this is how equations are solved at wall.
duri is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 15:48.