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-   -   Artificial viscosity (http://www.cfd-online.com/Forums/cfx/22864-artificial-viscosity.html)

rads July 20, 2006 01:55

Artificial viscosity
 
hi

i am doing analysis on centrifugal blower. while solving with higher mass flow rates the solution is converged in CFX, but if i am solving for low mass flow rates for the same model at same speed the analysis is not converging. it is oscillating. i want to give artificial viscosity for getting converged results. is it correct? and how can we give artificial viscosity in CFX?plssssssssss reply sooooooooon if u have idea...

Thnks & Regards


johnny July 26, 2006 09:34

Re: Artificial viscosity
 
Maybe your blower is stalling. In this case, you may need to reduce your timestep or maybe a you need to do a transient analysis.

rads July 31, 2006 07:02

Re: Artificial viscosity
 
i have reduced time step even though it is not converging.How can i start to do transient analysis? How can i calculate the total time duration? how can i check for converging? please anybody give reply soon.

Thanks &regards



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