CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Spalart - Allmaras Turbulence Jacobian

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

LinkBack Thread Tools Display Modes
Old   July 21, 2010, 16:55
Question Spalart - Allmaras Turbulence Jacobian
New Member
Join Date: Jul 2010
Posts: 1
Rep Power: 0
yamuzo is on a distinguished road
Hello everyone,

I am trying to implement the SA turbulence model to an existing NS solver with FEM, where the NS and SA governing equations will be solved at the same time, coupled. I am having trouble in deriving the Jacobian for the SA equation.

I think the derivative of the NS equations with respect to turbulent viscosity Nu^tilde is zero. If the last row of the residual is the SA residual, the last column of the NS-part of the Jacobian is all zero (4 zeros for 2D case). But I am having trouble in calculating the derivative of the SA equation with respect to the states. I am using conservative variables (Rho , Rho*v_j , Rho*E, Rho*Nu^tilde) to define the equations.

Any help would be appreciated.
yamuzo is offline   Reply With Quote


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Numerical integration of Spalart Allmaras turbulence model RenardP Main CFD Forum 0 June 11, 2009 14:53
Discussion: Reason of Turbulence!! Wen Long Main CFD Forum 3 May 15, 2009 09:52
Spalart Allmaras Paper Seroga Main CFD Forum 0 April 7, 2008 02:48
Spalart Allmaras Turbulence model - Need article! CFD Student Main CFD Forum 0 December 27, 2004 05:28

All times are GMT -4. The time now is 13:57.