Quenching simulation : how to set up a conjugate heat transfer between solid&liquid

dsking · October 17, 2012, 15:46

Quote:

Originally Posted by Markat

I have already done this so that the meshing in the common line-surface between the solid and the fluid is the same for both fluid ans solid.
Would you suggest to mesh to solid part or not? What's the exact difference?

Yes, you must mesh the solid part as well so that Fluent can solve for the temperatures at each node in the solid (via the heat conduction equation). When you mesh the solid, the fluid/solid interface nodes have to match as well.

syavash · October 17, 2012, 16:07

Quote:

Originally Posted by dsking

Yes, you must mesh the solid part as well so that Fluent can solve for the temperatures at each node in the solid (via the heat conduction equation). When you mesh the solid, the fluid/solid interface nodes have to match as well.

Dear dsking,

I have either meshed the solid zone, but Fluent does not solve the heat transfer at all. Would you help me to understand what is wrong?
tnx

syavash · August 30, 2013, 10:05

Despite it's been a while since the last comment, I decided to back on the thread and share the solution.
Conjugate heat transfer (2D) does happen but very slowly in laminar flow.
If you want to see the final solution, solve the problem in steady-state mode.
If you select a proper turbulence model you can easily watch both solid & fluid changing temperature in a transient solution. Therefore there is no need to convert the geometry to 3D.
I hope this can help.

aviskar · March 15, 2015, 00:19

hi everyone,
i am Dhaval solanki doing simulation on fin heat transfer from engine cylinder. Here i have coupled fluid solid mesh for conjugated heat transfer between interface. Now i am facing problem in giving constant temperature boundary condition inside cylinder wall, because if i give constant temperature at wall created by conjugated coupled option, it will decouple the wall from fluid.
other one is i am new fluent user i also want to know how to get heat transfer co-efficient and heat flux graph with respect to streamwise direction..
thanks

xnou · August 30, 2016, 07:33

Hello everyone,

I am also facing the same problem in CHT modeling (2D case) in fluent.
here i have one hot cylinder (250c) and another cylinder is placed beside hot cylinder.
air with velocity 100 m/s at 30c is flowing over the cylinders. now i want to find the temperature of the second cylinder because of convection. i have made grid in solid portion also.

Thanks in advance.

August 30, 2013, 10:05	Solution	#23
syavash Senior Member Ehsan Asgari Join Date: Apr 2010 Posts: 473 Rep Power: 18	Despite it's been a while since the last comment, I decided to back on the thread and share the solution. Conjugate heat transfer (2D) does happen but very slowly in laminar flow. If you want to see the final solution, solve the problem in steady-state mode. If you select a proper turbulence model you can easily watch both solid & fluid changing temperature in a transient solution. Therefore there is no need to convert the geometry to 3D. I hope this can help.

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March 15, 2015, 00:19		#24
aviskar New Member Aviskar Dhaval Solanki Join Date: Mar 2015 Posts: 1 Rep Power: 0	hi everyone, i am Dhaval solanki doing simulation on fin heat transfer from engine cylinder. Here i have coupled fluid solid mesh for conjugated heat transfer between interface. Now i am facing problem in giving constant temperature boundary condition inside cylinder wall, because if i give constant temperature at wall created by conjugated coupled option, it will decouple the wall from fluid. other one is i am new fluent user i also want to know how to get heat transfer co-efficient and heat flux graph with respect to streamwise direction.. thanks

August 30, 2016, 07:33		#25
xnou New Member RAVI KARAN TRIPATHI Join Date: Aug 2014 Posts: 10 Rep Power: 12	Hello everyone, I am also facing the same problem in CHT modeling (2D case) in fluent. here i have one hot cylinder (250c) and another cylinder is placed beside hot cylinder. air with velocity 100 m/s at 30c is flowing over the cylinders. now i want to find the temperature of the second cylinder because of convection. i have made grid in solid portion also. Thanks in advance.