|September 17, 2013, 07:41||
mut and alphat & compressible flow
Join Date: Sep 2012
Location: Iran - Tehran
Posts: 185Rep Power: 6
Hi foamers ,
I have a question about setting mut and alphat file in the 0 directory .
I checked rhopimpleFoam tutorial . In this case all values of mut and alphat on the walls are 0 .
type mutwallFunction; ------> for mut
value uniform 0;
type alphatwallFunction; ------> for alphat
value uniform 0;
Also I checked kEpsilon.C in this source code I found a formula for calculating mut and alphat .
mut_ = Cmu_*rho_*sqr(k_)/epsilon_;
alphat_ = mut_/Prt_;
I want to create a case by coldEngineFoam . So I should set mut and alphat file and I am confusing about setting these files.
Please anybody guide me. I should set uniform 0 for them or I should calculate them by using their formula . Why in the tutorial the values have set uniform 0 ??
I appreciate any help from you.
Thanks and best regards,
|September 17, 2013, 12:54||
Join Date: Sep 2009
Location: Tehran, Iran
Blog Entries: 1Rep Power: 17
as much as i know , when you are using wall function, the value is place holder! so that value is not important and the value of variable will be calculated based upon correlation
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