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Member
Reine Granström
Join Date: Apr 2009
Location: Sweden
Posts: 43
Rep Power: 16 ![]() |
Dear all,
I am trying to compare the wall function implementation in CFX and Fluent, and there are a few things I don't understand from reading the documentation. The problem is as follows: As I understand it, at least in CFX the reason for using the form of nondimensionalized distance and velocity having superscript "*" rather than "+" is due to the law of the wall becoming singular at separation points. The definition of the dimensionless wall distance y* is the same in both codes: ![]() ![]() ![]() First, in CFX the friction velocity ![]() ![]() In Fluent on the other hand, a dimensionless velocity ![]() ![]() where ![]() My guess is that the latter expression is used for the same reason as (eq. 2.222) is used in CFX, i.e. to cope with the singularity issue. My interpretation is that the following is done in Fluent: I assume that ![]() ![]() ![]() If the dimensionless velocity in CFX (equivalent to Fluent's ![]() ![]() I appreciate any comments. Last edited by gravis; May 5, 2010 at 03:07. Reason: Rephrasing and corrections |
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