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Negative Volume Elements

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Old   September 20, 2011, 19:22
Default Negative Volume Elements
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Hey everyone,

I'm trying to create a mesh in icem then import it to cfx-pre to solve. I've checked the mesh quality for negative volume elements in ICEM, and it tells me that the min element volume is 0.003453 - which I'm assuming means there are no elements with volumes less than that.

However, when I import it over to CFX to solve, the solver tells me that it has found a negative volume element.

Could someone shed some light on this for me please?

Thanks.
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Old   September 20, 2011, 20:46
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Check 'Determinant 2x2x2', or 'Quality'. They tend to deliver negative values for inverted elements. Also, I think there is one function on the 'Edit Mesh > Check Mesh' feature that will search for inverted elements. Try that as well.
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Old   September 20, 2011, 21:15
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Thanks for the tip. I've just run mesh diagnostics, but it tells me that there are no issues. Checking the element determinants also yields no negative values. Mesh in CFX is still giving me the same error though.

If it's relevant I'm running the frozen rotor model (but not doing any transient analysis atm).
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Old   September 21, 2011, 00:26
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After some work, fixed the neg elements and model is good to go. Thanks
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