CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Wiki > Wall functions

Wall functions

From CFD-Wiki

(Difference between revisions)
Jump to: navigation, search
m (Reverted edits by RolmoNboce (Talk) to last version by Radi Sadek)
 
(One intermediate revision not shown)

Latest revision as of 09:47, 17 December 2008

Based on law of the wall

A wall-function simulation normally requires that y plus of the first cell outside the walls is in the log-layer, which starts at about y plus 20 and, depending on the Re number, extends up to say y plus 200. In the log layer, there is equilibrium between production and dissipation of the turbulent kinetic energy, therefore decreasing turbulent instability in near-wall simulations.

Another empiric profile that covers both the near wall and logarithmic region is the Reichardt profile.


My wiki