Temperature Data From Outlet to Inlet

shzinwoyk · November 11, 2016, 10:37

Dear forum Users,

I met with a small problem.

In short, I need to do a thermal analysis of a stream in the tank. There is an inlet, outlet and heater near the tank floor. The tank's half full. Inlet, outlet and heater surface are below phase 1. Normally I use recirculation BC but it does not work with VOF. The Inlet and Outlet are only in Phase 1. It's a heating process. There is a circulation system in the tank. I would like to define the outlet temperature as inlet temperature. This is transient analysis. My code background is at the entry level. I prepared some codes but I get error messages.

I think it is a very simple problem for experienced coders. Could you help or guide me in this matter?

Thank you
Best Regards

shzinwoyk · November 14, 2016, 06:17

No one with knowledge?

`e` · November 14, 2016, 20:22

Is the temperature distribution at the outlet uniform? Then you could set the inlet boundary as the average of the outlet, otherwise you'll need to carry the distribution between boundaries (easier if the boundaries are conformal).

shzinwoyk · November 15, 2016, 02:18

Quote:

Originally Posted by `e`

Is the temperature distribution at the outlet uniform? Then you could set the inlet boundary as the average of the outlet, otherwise you'll need to carry the distribution between boundaries (easier if the boundaries are conformal).

Probably temperature distribution is not uniform at the outlet but ı want to get average value and to define at inlet this value. Boundaries are not conformal and area, shape..etc are different.

`e` · November 15, 2016, 03:54

That shouldn't be too difficult to write code for. Have a read of: http://www.cfd-online.com/Forums/flu...tml#post613859

They have looped over a boundary (for your case, use the outlet boundary ID) and calculated the weighted average (by boundary face area) temperature. Apply this average temperature to all boundary faces on the inlet using a DEFINE_PROFILE macro (the loop over the outlet boundary temperature values should also sit inside this macro; no need for their DEFINE_EXECUTE_AT_END in your case).

shzinwoyk · November 15, 2016, 04:33

Quote:

Originally Posted by `e`

That shouldn't be too difficult to write code for. Have a read of: http://www.cfd-online.com/Forums/flu...tml#post613859

They have looped over a boundary (for your case, use the outlet boundary ID) and calculated the weighted average (by boundary face area) temperature. Apply this average temperature to all boundary faces on the inlet using a DEFINE_PROFILE macro (the loop over the outlet boundary temperature values should also sit inside this macro; no need for their DEFINE_EXECUTE_AT_END in your case).

Thx for massege, I will try

If it will work correctly, I will share my code

sanjeevkumar patne · November 21, 2016, 04:16

Hi everyone,

I will take discussion little deviated.

I am doing heat analysis of drum using fluent.
I am finding difficult in giving inlet and outlet boundary condition.
As it is inlet flow and I feel defining a cylindrical or rectangular region is not appropriate.

So kindly suggest me as I am new to it(student).

Thanks in advance.

Ahmed kandil · October 21, 2021, 10:37

please ,
i need this code as ineed it for my research could you help me..

November 11, 2016, 10:37	Temperature Data From Outlet to Inlet	#1
shzinwoyk New Member alper yıldırım Join Date: Feb 2014 Posts: 10 Rep Power: 12	Dear forum Users, I met with a small problem. In short, I need to do a thermal analysis of a stream in the tank. There is an inlet, outlet and heater near the tank floor. The tank's half full. Inlet, outlet and heater surface are below phase 1. Normally I use recirculation BC but it does not work with VOF. The Inlet and Outlet are only in Phase 1. It's a heating process. There is a circulation system in the tank. *I would like to define the outlet temperature as inlet temperature.* This is transient analysis. My code background is at the entry level. I prepared some codes but I get error messages. I think it is a very simple problem for experienced coders. Could you help or guide me in this matter? Thank you Best Regards

November 15, 2016, 03:54		#5
`e` Senior Member Join Date: Mar 2015 Posts: 892 Rep Power: 18	That shouldn't be too difficult to write code for. Have a read of: http://www.cfd-online.com/Forums/flu...tml#post613859 They have looped over a boundary (for your case, use the outlet boundary ID) and calculated the weighted average (by boundary face area) temperature. Apply this average temperature to all boundary faces on the inlet using a DEFINE_PROFILE macro (the loop over the outlet boundary temperature values should also sit inside this macro; no need for their DEFINE_EXECUTE_AT_END in your case). Berkk likes this.

November 21, 2016, 04:16	Drum brake	#7
sanjeevkumar patne New Member sanju Join Date: Nov 2016 Posts: 19 Rep Power: 10	Hi everyone, I will take discussion little deviated. I am doing heat analysis of drum using fluent. I am finding difficult in giving inlet and outlet boundary condition. As it is inlet flow and I feel defining a cylindrical or rectangular region is not appropriate. So kindly suggest me as I am new to it(student). Thanks in advance.

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November 14, 2016, 06:17		#2
shzinwoyk New Member alper yıldırım Join Date: Feb 2014 Posts: 10 Rep Power: 12	No one with knowledge?

November 14, 2016, 20:22		#3
`e` Senior Member Join Date: Mar 2015 Posts: 892 Rep Power: 18	Is the temperature distribution at the outlet uniform? Then you could set the inlet boundary as the average of the outlet, otherwise you'll need to carry the distribution between boundaries (easier if the boundaries are conformal).

October 21, 2021, 10:37		#8
Ahmed kandil New Member AHMED KANDIL Join Date: Oct 2021 Posts: 14 Rep Power: 5	please , i need this code as ineed it for my research could you help me..