Conjugate heat transfer

Shivam Singhal · December 17, 2019, 07:15

I am doing Jet impingement heat transfer phenomenon on a solid plate in 2D. Solid plate is at 500K initially. Now from air jet impingement, it will cool down the Solid target plate.

I am initializing solid plate using patch option. I am running steady sate phenomenon. The problem here is I am not able to observe temperature variations in solid domain. However there is temperature variation along interface in fluid region only.

I need to see temperature variation in solid plate to do structural analysis. Interface is automatically selected as "Coupled" for both wall and its shadow. Please help.

MKuhn · December 19, 2019, 09:12

If you have steady state problem, your solution will not depend on your initializing. You can initialize what you want, the solution depends only on your boundary conditions.

Shivam Singhal · December 19, 2019, 23:18

Ty sir, I have solved the problem for this convection using transient solution. Now I need to apply CHF boiling model for because of film boiling on solid surface. Please suggest me the further approach as everytime I run my solution, errors do appear.

Its a 3 phase flow. In fluid domain air is there, Water will come from inlet, further as water fall on solid, film boiling occurs and vapors are form (3 phases : air, water and vapor). Now I am making assumption that air is same as vapor and reducing the problem to 2 phase flow. Now, Vapor is there is entire fluid domain and water enters from inlet. As water falls on heated solid, film boiling occurs and vapors are formed.

I am using by default boiling conditions (saturation temp = 373K) and setting my residual monitor when water facet maximum temperature reaches 373K (as boiling will stop at this condition). Please help.

MKuhn · December 20, 2019, 02:07

Sorry, I'm not an expert in multi phase flows.

December 17, 2019, 07:15	Conjugate heat transfer	#1
Shivam Singhal New Member Shivam Singhal Join Date: Feb 2017 Posts: 21 Rep Power: 9	I am doing Jet impingement heat transfer phenomenon on a solid plate in 2D. Solid plate is at 500K initially. Now from air jet impingement, it will cool down the Solid target plate. I am initializing solid plate using patch option. I am running steady sate phenomenon. The problem here is I am not able to observe temperature variations in solid domain. However there is temperature variation along interface in fluid region only. I need to see temperature variation in solid plate to do structural analysis. Interface is automatically selected as "Coupled" for both wall and its shadow. Please help.

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December 19, 2019, 09:12		#2
MKuhn Senior Member Moritz Kuhn Join Date: Apr 2010 Location: Germany, Dresden Posts: 207 Rep Power: 17	If you have steady state problem, your solution will not depend on your initializing. You can initialize what you want, the solution depends only on your boundary conditions.

December 19, 2019, 23:18		#3
Shivam Singhal New Member Shivam Singhal Join Date: Feb 2017 Posts: 21 Rep Power: 9	Ty sir, I have solved the problem for this convection using transient solution. Now I need to apply CHF boiling model for because of film boiling on solid surface. Please suggest me the further approach as everytime I run my solution, errors do appear. Its a 3 phase flow. In fluid domain air is there, Water will come from inlet, further as water fall on solid, film boiling occurs and vapors are form (3 phases : air, water and vapor). Now I am making assumption that air is same as vapor and reducing the problem to 2 phase flow. Now, Vapor is there is entire fluid domain and water enters from inlet. As water falls on heated solid, film boiling occurs and vapors are formed. I am using by default boiling conditions (saturation temp = 373K) and setting my residual monitor when water facet maximum temperature reaches 373K (as boiling will stop at this condition). Please help.

December 20, 2019, 02:07		#4
MKuhn Senior Member Moritz Kuhn Join Date: Apr 2010 Location: Germany, Dresden Posts: 207 Rep Power: 17	Sorry, I'm not an expert in multi phase flows.