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Turbulence model of hydraulic valve

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Hello everybody

I really hope you can help me with this:-)
I'm currently trying to simulate a flow of hydraulic oil through a valve however, I keep getting the following error:
Failed to find a solution.
In segregated group 1:
Divergence of the linear iterations.
Returned solution is not converged.

I'm relatively new at using Comsol but this forum has giving me a lot of information and I've solved many of my previous poblems using your answers although I couldn really find anything about my current problem. I've tried to fix the stated problem by increasing the Factor of error estimate which did'n do anything.
It's a rather simple geometry at 220x160x140 [mm] and Im having enough elements for the boundary layer mesh to be without errors or problems which leaves me at 271206 degrees of freedom.

I've included the convergence plot.

Best regards

Mikael


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