[uorinopuot]

Hello,

I am modelling a throttle valve. The motion of the valve is coupled with the flow and there is a monitor point at the edge of it through which i measure the angle at which the valve has turned. When my simulation crashes due to negative volumes, I see the last set of results and create a new mesh to run the simulation again from where it stopped. Now, i also define in the run the initial values specification from my last results.

The problem now is that the solver starts and at some point has a very abnormal behaviour. In any monitor point i have the value starts to oscillate very slightly in the beginning and after some timesteps the oscillation is really severe.

I tried changing the timestep and the accuracy of the solver but there was no change. I also tried to run an earlier remeshing step which had worked, without making any changes, but now it did not work and the behaviour was the same.

Has anyone seen this before? Any help would be greatly appreciated.
Thank you.