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Why do flow trajectory lines stop and some continue?

Question asked by Nicholas Roberts on Dec 5, 2014
Latest reply on Dec 10, 2014 by Jared Conway

I am running an internal flow simulation. It has a volume flow rate inlet boundary condition, and a atmospheric pressure outlet boundary condition.

the part being modeled is a thermal head with very small and thin pin fins so the mesh is very small. The simulation runs fine, but when creating a flow trajectory plot some of the line stop before reaching the outlet and only a few reach the outlet.

 

Why would some of the trajectory lines suddenly stop?

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