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Old   January 10, 2010, 19:01
Question need to calculate Nusselt Number
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hey there
need help calculate Nu on blockage
a laminar flow in rectangular pipe
i uploaded the pic of the geometry

adiabatic walls
blockage has fixed temp 350 K
fluid is air with 300 K temp

thanx for help...
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Old   January 11, 2010, 02:50
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In cases like this, I create a region (plane, line) near the wall (with a distance dx), then the expression dT/dx can be estimated, and therefore the nusselt number. Otherwise, you can use the variable "wall heat coefficient"

I hope this help you, good luck.
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