Setting Heat Flux on an interface

azueter · June 11, 2017, 17:00

Hello All,

I am modeling a parabolic trough collector model which consists of the following parts:

1) Annular Gap (Vacuum) --> OD=0.11m
2) Solid Tube (Steel) --> OD=0.07m
3) Heat Transfer Fluid (oil)--> OD=0.066m

Surely there should be coupled interface model between the annular gap and solid tube in addition to another one between the tube and fluid.

As part of the model, I have non-uniform concentrated heat flux on the outer absorber tube (adjacent to the annular gap). However, I don't see how I can add a heat flux boundary on an interface. Any help here?

I have found that using the hidden-surface (that is built automatically by FLUENT on interfaces) heat generation rate using a very thin layer to give very good approximation of heat flux profile. I just would like to check, is that the correct way to model it?

canalpk · June 13, 2018, 02:46

Hello azueter,
Did you find any solution for your problem? I am facing the same issue.

June 11, 2017, 17:00	Setting Heat Flux on an interface	#1
azueter New Member Ahmad Zueter Join Date: Jun 2017 Posts: 4 Rep Power: 8	Hello All, I am modeling a parabolic trough collector model which consists of the following parts: 1) Annular Gap (Vacuum) --> OD=0.11m 2) Solid Tube (Steel) --> OD=0.07m 3) Heat Transfer Fluid (oil)--> OD=0.066m Surely there should be coupled interface model between the annular gap and solid tube in addition to another one between the tube and fluid. As part of the model, I have non-uniform concentrated heat flux on the outer absorber tube (adjacent to the annular gap). However, I don't see how I can add a heat flux boundary on an interface. Any help here? I have found that using the hidden-surface (that is built automatically by FLUENT on interfaces) heat generation rate using a very thin layer to give very good approximation of heat flux profile. I just would like to check, is that the correct way to model it?

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June 13, 2018, 02:46		#2
canalpk New Member canalpk Join Date: Apr 2018 Posts: 2 Rep Power: 0	Hello azueter, Did you find any solution for your problem? I am facing the same issue.