No conjugate heat transfer between solid (cast iron) and fluid (water) part

Rajaero · August 21, 2018, 20:58

Hello guys,
I am working on conjugate heat transfer problem in fluent. In my problem i have one solid zone (cast iron) and one fluid zone (water). cold water flowing inside to the solid part (like water flowing in a pipe). water is used to cool the solid part. I have created coupled interface (wall and wall shadow) between solid and fluid zone. The solution converged but there is no conjugate heat transfer occurs. I tried this problem many time with all possible way. please help me with this.

Boundary condition:
water inlet velocity = 2 m/s
water inlet temp = 303K
outlet pressure = 2.5bar
solid part temperature = 453K (I dont have h and heat flux value)

Questions:
1. how to set thermal boundary condition if i only know solid temperature?
2. solution converged but no conjugate heat transfer taking place?

Thanks in advance...Its urgent please help me with this guys.

AlexanderZ · August 22, 2018, 01:43

try to decrease inlet velocity from 2m/s to 0.2m/s or even 0.02m/s
check material properties of fluid, is it water? (may be it is still air by the mistake?)

best regards

Rajaero · August 22, 2018, 02:03

Hi,
Thanks for your reply.
I checked water properties and it is good.

Questions:
CHT problem:
how to set thermal boundary condition if i only know solid temperature ?

Thanks in advance...

AlexanderZ · August 22, 2018, 02:09

BC depends on your model, on the goal of your simulation.
What does it mean, temperature of solid?
Does you simulation steady state or transient?
What about solid temperature, is it constant through the whole simulation?
Or this is temperature at the simulation beginning only?

best regards

Rajaero · August 22, 2018, 22:57

Hi,
Thanks for your suggestion. I found my problem.
Thanks...

vivekdixit · June 25, 2023, 03:07

Hello All,
I am trying to set up the case where the structure is doing heat transfer with the fluid in SU2. So I want to know if is it possible to set the conjugate heat transfer case with FSI in SU2.

August 21, 2018, 20:58	No conjugate heat transfer between solid (cast iron) and fluid (water) part	#1
Rajaero Member Taiwan,new north city Join Date: Aug 2017 Location: Taiwan Posts: 74 Rep Power: 8	Hello guys, I am working on conjugate heat transfer problem in fluent. In my problem i have one solid zone (cast iron) and one fluid zone (water). cold water flowing inside to the solid part (like water flowing in a pipe). water is used to cool the solid part. I have created coupled interface (wall and wall shadow) between solid and fluid zone. The solution converged but there is no conjugate heat transfer occurs. I tried this problem many time with all possible way. please help me with this. Boundary condition: water inlet velocity = 2 m/s water inlet temp = 303K outlet pressure = 2.5bar solid part temperature = 453K (I dont have h and heat flux value) Questions: 1. how to set thermal boundary condition if i only know solid temperature? 2. solution converged but no conjugate heat transfer taking place? Thanks in advance...Its urgent please help me with this guys.

June 25, 2023, 03:07	FSI Conjugate Heat Transfer	#6
vivekdixit New Member Bihar Join Date: May 2023 Posts: 3 Rep Power: 2	Hello All, I am trying to set up the case where the structure is doing heat transfer with the fluid in SU2. So I want to know if is it possible to set the conjugate heat transfer case with FSI in SU2.

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August 22, 2018, 01:43		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	try to decrease inlet velocity from 2m/s to 0.2m/s or even 0.02m/s check material properties of fluid, is it water? (may be it is still air by the mistake?) best regards

August 22, 2018, 02:03		#3
Rajaero Member Taiwan,new north city Join Date: Aug 2017 Location: Taiwan Posts: 74 Rep Power: 8	Hi, Thanks for your reply. I checked water properties and it is good. Questions: CHT problem: how to set thermal boundary condition if i only know solid temperature ? Thanks in advance...

August 22, 2018, 02:09		#4
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	BC depends on your model, on the goal of your simulation. What does it mean, temperature of solid? Does you simulation steady state or transient? What about solid temperature, is it constant through the whole simulation? Or this is temperature at the simulation beginning only? best regards

August 22, 2018, 22:57		#5
Rajaero Member Taiwan,new north city Join Date: Aug 2017 Location: Taiwan Posts: 74 Rep Power: 8	Hi, Thanks for your suggestion. I found my problem. Thanks...