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How to calculate dimensionless numbers Ra, Re, Gr

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Old   October 1, 2007, 04:33
Default How to calculate dimensionless numbers Ra, Re, Gr
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I'm calculating metal casting system. I have gas and metal liquid convection flows inside two furnaces. I have to compare these two systems and probably dimensionless numbers will be the best: Ma, Pr, Re, Ra. Could anyone help me in calculating these numbers in Fluent? How to do this? By custom filed functions?

Thanks in advance!

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