CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   FLUENT (https://www.cfd-online.com/Forums/fluent/)
-   -   dynamic mesh (https://www.cfd-online.com/Forums/fluent/190795-dynamic-mesh.html)

nhhamidsa July 22, 2017 13:11
dynamic mesh
 
hello all,


i'm trying to model a dynamic stall (using dynamic mesh) of an airfoil in ansys-fluent. my oscillation frequency is 1.86 . my question is that what is the upper limit of the time step (is 1e-4)????

FMDenaro July 22, 2017 13:28
Quote:
Originally Posted by nhhamidsa (Post 658068)
hello all,


i'm trying to model a dynamic stall (using dynamic mesh) of an airfoil in ansys-fluent. my oscillation frequency is 1.86 . my question is that what is the upper limit of the time step (is 1e-4)????

The upper limit depends not only on the physical frequency but also on the numerical stability constraint


All times are GMT -4. The time now is 18:33.