CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   simulation of a stirred tank (http://www.cfd-online.com/Forums/cfx/18468-simulation-stirred-tank.html)

hu February 17, 2001 08:23

simulation of a stirred tank
 
Hi, everybody,

I intend to simulate a stirred tank with Rushton-impellers using a snapshot method proposed by prof.Ranade. Has anyone tried this method?

He thought the mass sink Sm=-Rho * Abc * Wbc ( Abc and Wbc are the area of the computation cell adjacent to the back side of the blade and rotational velocity of blade respetively) and mass source Sm1= - Sm for the compuatation cell adjacent to the front side of the blade, which means Wbc = Omega * r ( r is the radius of the computation cell). However when I add the mass source and sink into the pressure equation, (by su=su+sm) and I add the corrosponding source terms and sink terms into the momentum equations ( by su=su+sm*phi, phi is U, V, W velocities of the last iteration). However, I found I can not proceed because there is a fatal error about floating-point mistakes.

Who can give me some suggestion?


All times are GMT -4. The time now is 23:48.