CFD Online URL
[Sponsors]
Home > Forums > OpenFOAM

About devReff() and divDevReff() in kEpsilon.C

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 24, 2009, 03:05
Default About devReff() and divDevReff() in kEpsilon.C
  #1
New Member
 
Zheng.Zhi
Join Date: Jul 2009
Location: Beijing China
Posts: 9
Rep Power: 7
Zheng.Zhi is on a distinguished road
In incompressible case , in kEpsilon.C , devReff() = -nuEff()*dev(twoSymm(fvc::grad(U_))) , we know divU=0 in incompressible case , so why not use devReff() = -nuEff()*twoSymm(fvc::grad(U_)) , is there any CFD programming technique to use dev() function ?

And in incompressible case , divDevReff() = -fvm::laplacian(nuEff(),U) - fvc::div(nuEff()*dev(fvc::grad(U)().T())) , is there any special reason use dev() function ? or why not use dev2(fvc::grad(U)().T()) as in compressible case ?

thanks a lot .
Zheng.Zhi is offline   Reply With Quote

Reply

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 07:31.