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Dynamic Mesh failed. Negative Cell Volume Detected

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Old   August 27, 2014, 04:51
Default Dynamic Mesh failed. Negative Cell Volume Detected
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Sufyan Abushaala
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Dear All

I am simulating a 3D sphere travelling in a pipe filled with water under transient conditions. The geometry has around 1m elements, and I am using 0.001s time step size with k-w sst solver.
The issue is about running the model for longer time with no problems, and as I was trying to make quick by reducing the Max Iterartions/Time Step or increasing the time step size, I get that error.
Basically there are three dynamic mesh zones with a cell height of 0.005m, so is there a proper way to estimate the best value of it?

Please give me a hand in this problem I am having.

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