Problem to give different heat flux values over pipe

SHREEKANT · October 6, 2015, 03:16

I have to give different heat flux values over a pipe with water flow,
the upper portion of pipe that is for 270 deg. i have to give 550W/m2 and for lower 90 deg. 18800 W/m2.
May i please know how to do it? whether i have to define UDF or it can be simply done

nurjs · November 5, 2015, 09:38

hi. can i know if you find a solution to your problem. i has the seam problem my results of heat flux not uniform and this lead to obtained a value of bulk temperature larger than average temperature.can any one help me to know whats wrong in my problem.

`e` · November 5, 2015, 16:14

Have a read of the DEFINE_PROFILE macro in the UDF manual. Then within your UDF, distinguish between the upper and lower portions of pipe with an if statement.

October 6, 2015, 03:16	Problem to give different heat flux values over pipe	#1
SHREEKANT New Member SHREEKANT Join Date: Sep 2015 Posts: 5 Rep Power: 11	I have to give different heat flux values over a pipe with water flow, the upper portion of pipe that is for 270 deg. i have to give 550W/m2 and for lower 90 deg. 18800 W/m2. May i please know how to do it? whether i have to define UDF or it can be simply done

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November 5, 2015, 09:38		#2
nurjs New Member nurjs Join Date: Oct 2015 Location: Iraq Posts: 11 Rep Power: 11	hi. can i know if you find a solution to your problem. i has the seam problem my results of heat flux not uniform and this lead to obtained a value of bulk temperature larger than average temperature.can any one help me to know whats wrong in my problem.

November 5, 2015, 16:14		#3
`e` Senior Member Join Date: Mar 2015 Posts: 892 Rep Power: 18	Have a read of the DEFINE_PROFILE macro in the UDF manual. Then within your UDF, distinguish between the upper and lower portions of pipe with an if statement.