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About negative volume of cells!

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Old   April 15, 2005, 23:49
Default About negative volume of cells!
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Hello everyone!

Here I have one problem for help!

When I doing a case of moving mesh,I was said there are some cells as negative volume. The realty is that I have do some case as which continually, the case has problem differs from the other one is that it just add some cells as a part of the inital mesh!

I have set 2000 timesteps, it happen at the timestep of 1964. As I decrease the timestep,it does not work!

Thanks advance!!
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