inverse heat transfer problem

siva0182 · April 8, 2010, 04:57

Dear all

I wish to solve a 1D heat conduction problem inside a copper block.

the bottom end has constant heat flux boundary condition and the top end has a variable heat transfer coefficient.

i have measurement data for transient temperature profile at two interior points.

How do i estimate the transient heat transfer coefficient?

I understand there is no direct option available in fluent.but even if I am supposed to write UDF what is the approach and how to go about the same?

other wise are there any open source codes available for solving inverse problems?

regards
Siva

rogbrito · January 29, 2012, 08:23

Hi,

i have the same doubt as you. Take a look at http://www.cfd-online.com/Forums/mai...-possible.html .

Rogerio.

Quote:

Originally Posted by siva0182

Dear all

I wish to solve a 1D heat conduction problem inside a copper block.

the bottom end has constant heat flux boundary condition and the top end has a variable heat transfer coefficient.

i have measurement data for transient temperature profile at two interior points.

How do i estimate the transient heat transfer coefficient?

I understand there is no direct option available in fluent.but even if I am supposed to write UDF what is the approach and how to go about the same?

other wise are there any open source codes available for solving inverse problems?

regards
Siva

alireza7246 · February 19, 2019, 02:06

hi all, i have a square with heat generation rate inside that, i have three boundary conditions with constant temperature, but i dont have heat flux from one of walls, i want to simulate this problem in Fluent, could you please any one explain me??

LuckyTran · February 19, 2019, 08:45

Quote:

Originally Posted by alireza7246

hi all, i have a square with heat generation rate inside that, i have three boundary conditions with constant temperature, but i dont have heat flux from one of walls, i want to simulate this problem in Fluent, could you please any one explain me??

You need to know all your boundary conditions.

alireza7246 · February 19, 2019, 14:15

i have three wall with constant temperature 300k that is determined but the output heat flux from one wall is unknown, i have temperature within the enclosure that is 400k.

LuckyTran · February 20, 2019, 09:33

You need to know all your boundary conditions. End of story.

AlexanderZ · February 22, 2019, 06:00

you should modify your domain
for example add solid attached to 4th wall or some fluid zone, depending on your case
so you will get other boundaries with known boundary conditions

best regards

April 8, 2010, 04:57	inverse heat transfer problem	#1
siva0182 New Member siva Join Date: Apr 2010 Posts: 1 Rep Power: 0	Dear all I wish to solve a 1D heat conduction problem inside a copper block. the bottom end has constant heat flux boundary condition and the top end has a variable heat transfer coefficient. i have measurement data for transient temperature profile at two interior points. How do i estimate the transient heat transfer coefficient? I understand there is no direct option available in fluent.but even if I am supposed to write UDF what is the approach and how to go about the same? other wise are there any open source codes available for solving inverse problems? regards Siva

February 19, 2019, 02:06	inverse heat transfer	#3
alireza7246 New Member alireza javadpour Join Date: Feb 2019 Posts: 9 Rep Power: 7	hi all, i have a square with heat generation rate inside that, i have three boundary conditions with constant temperature, but i dont have heat flux from one of walls, i want to simulate this problem in Fluent, could you please any one explain me??

February 19, 2019, 14:15	inverse heat transfer	#5
alireza7246 New Member alireza javadpour Join Date: Feb 2019 Posts: 9 Rep Power: 7	i have three wall with constant temperature 300k that is determined but the output heat flux from one wall is unknown, i have temperature within the enclosure that is 400k.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wall heat transfer coefficient (HTC) problem	Mohamed khamis	CFX	1	January 15, 2010 23:12
Heat transfer problem	menorka	OpenFOAM	1	November 26, 2009 04:22
How can I increase Heat Transfer at Domain Interf?	B.Simon	CFX	3	October 28, 2008 18:53
heat transfer problem.	vipin	CFX	2	July 18, 2006 10:05
Convergence in a conjugate heat transfer problem	dp	Siemens	6	June 9, 2006 00:53

February 20, 2019, 09:33		#6
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	You need to know all your boundary conditions. End of story.

February 22, 2019, 06:00		#7
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	you should modify your domain for example add solid attached to 4th wall or some fluid zone, depending on your case so you will get other boundaries with known boundary conditions best regards