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The reason of the Sherwood number differences

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Old   December 24, 2015, 22:23
Default The reason of the Sherwood number differences
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yusuke uchihashi
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I don't understand a explanation in a literature(Khinast, J.G.,AIChE J., 47, 2304(2001)) .
He explained the reason of the Sherwood number differences in the leterature
「The difference between these values can be explained by the fact that the bubble in our computations is cylindrical and not spherical. For example, Nusselt numbers for spheres are higher than for cylinders at the same
Reynolds and Prandtl numbers .」.

I don't understand the reason the difference between coordinates make the results deffenent.
If you kwon the reason, please tell me it.

Thank you for reading my bad English.
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