Learning Forum

[rosyadaamron]

Hello,
I've done a transient analisys of a savonius turbine using mesh motion. the domain is rotating also the turbine (wall). i didn't change anything in URF.
The residual graph that i got looks like never go down to 1e-3. The drag force from the turbine is also oscillating, but the pattern is constant. Is my result converged? did i do something wrong? like is it true that in Sliding Mesh (Mesh Motion), the only part which is moving is the fluid (domain), not the turbine (wall)?

[Federico]

Hello, 

from your Drag plot, it appears that your results are stable. Generally, we recommend 3orders of magnitude decrease during a time step for the residuals. You can verify your results by allowing more iterations per time step to see if converging the intra-setp solution further improves or alter your drag results at all.