CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Problem in defining and using the deformation rate tensor

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 19, 2009, 13:50
Default Problem in defining and using the deformation rate tensor
  #1
Senior Member
 
Antonio Martins
Join Date: Mar 2009
Location: Porto, Porto, Portugal
Posts: 112
Rep Power: 17
titio is on a distinguished road
Send a message via MSN to titio Send a message via Skype™ to titio
Hi Foamers,

I am tying to represent the deformation rate tensor in OpenFoam. I know that some instalations use the following code, in the form:

DU=fvc::grad(U);
DUT=DU.T();
DR=DUT+DUT.T();

I know that other forms work just fine. However, when I solve the momentum equations, that include a term in the form constant*DR, why can not I write the following expression:

constant*(fvc::grad(U)+fvc::grad(U).T()).

Also, when I do DU.T() above, that is equivalent to do the fvc of the transpose of DU, he gradient of the velocities, right?

Your sincerely,

António Martins
titio is offline   Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 07:34.