need to calculate Nusselt Number

OnuR · January 10, 2010, 18:01

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...

BGK · January 11, 2010, 01:50

Hi!

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.

January 10, 2010, 18:01	need to calculate Nusselt Number	#1
OnuR New Member Join Date: Jan 2010 Posts: 1 Rep Power: 0	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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January 11, 2010, 01:50		#2
BGK New Member BGK Join Date: Aug 2009 Posts: 7 Rep Power: 16	Hi! 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.