Dynamic Mesh failed. Negative Cell Volume Detected -- CFD Online Discussion Forums

August 27, 2014, 05:51	Dynamic Mesh failed. Negative Cell Volume Detected	#1
Sufyan Abushaala New Member Sufyan Abushaala Join Date: Feb 2014 Location: Huddersfield, UK Posts: 18 Rep Power: 12	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. Regards,

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