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-   -   [ANSYS Meshing] Divergence in Transient solver (http://www.cfd-online.com/Forums/ansys-meshing/120870-divergence-transient-solver.html)

 Elio July 16, 2013 12:48

Divergence in Transient solver

Hello guys,
I've been trying to model a 2D vertical axis wind turbine using a transient solver. I had a tutorial which helped me a lot set up my problem and my code which defined the motion of the blade.
The blade motion is defined by the equation of motion of of a four bar linkage.
I can preview the mesh motion, which is what i need. The problem is that the solution diverges after only 10 iterations !
Do you reckon it's a problem from my code? (but the mesh motion is correct), or the mesh itself(which i highly suspect) or maybe the setup! (what is usually a key factor contributing to divergence in transient solvers)
Many thanks

 mvoss July 17, 2013 03:22

hi,
could be anything actually. ;)
Quote:
 Originally Posted by Elio (Post 440096) I've been trying to model a 2D vertical axis wind turbine using a transient solver.
Which one?
Quote:
 Originally Posted by Elio (Post 440096) The problem is that the solution diverges after only 10 iterations !
What is diverging? How is the setup?
How do you know the mesh motion is correct? Remeshing? Morphing?

matthias

P.S.: try to solve ONLY for the mesh motion without any u,v,w,p,eps,...

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