Inlet Boundary Condition

farhad-j · July 6, 2018, 13:39

Hello friends.
I'm modeling a shell and tube heat exchanger in Fluent.
It contains 27 tubes. All tube inlets are organized in one component as "tube inlet" with 0.02 kg/s mass flow rate.
Will this mass flow rate be automatically divided between tubes by fluent (like .02/27 kg/s) or I have to divide it?
Thanks for reply.

`e` · July 6, 2018, 20:01

If the tube inlets are all one boundary zone then I would expect that they would share the mass flow rate of 0.02 kg/s, whereas having 27 individual inlet zones would have a total mass flow rate of 27*0.02 kg/s. Regardless, you should double check with Postprocessing > Reports > Surface Integrals to ensure that the inlet condition is what you intended.

farhad-j · July 6, 2018, 20:16

thanks. it was helpful

July 6, 2018, 13:39	Inlet Boundary Condition	#1
farhad-j New Member farhad Join Date: May 2018 Posts: 10 Rep Power: 7	Hello friends. I'm modeling a shell and tube heat exchanger in Fluent. It contains 27 tubes. All tube inlets are organized in one component as "tube inlet" with 0.02 kg/s mass flow rate. Will this mass flow rate be automatically divided between tubes by fluent (like .02/27 kg/s) or I have to divide it? Thanks for reply.

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July 6, 2018, 20:01		#2
`e` Senior Member Join Date: Mar 2015 Posts: 892 Rep Power: 18	If the tube inlets are all one boundary zone then I would expect that they would share the mass flow rate of 0.02 kg/s, whereas having 27 individual inlet zones would have a total mass flow rate of 27*0.02 kg/s. Regardless, you should double check with Postprocessing > Reports > Surface Integrals to ensure that the inlet condition is what you intended.

July 6, 2018, 20:16		#3
farhad-j New Member farhad Join Date: May 2018 Posts: 10 Rep Power: 7	thanks. it was helpful