CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Measure of Heat Flux on a surface

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   October 10, 2018, 05:58
Default Measure of Heat Flux on a surface
New Member
Mathieu Coursault
Join Date: Jul 2018
Posts: 1
Rep Power: 0
MathieuCrslt is on a distinguished road
Hello CFD users,

I have a question about measuring the heat flux / heat loss through a surface in a 3D model.

I try to simulate a PCM melting in a water tank in transient simulation.
I have 2 domains: Water and pcm
The interface Water/PCM is a thin layer of steel, represented by a wall boundary condition, with a shell conduction of 1 thin layer of steel.
My process duration is 3hour, so I choose a 10 Sec time step.

To measure the heat flux thought the interface I use a report file with: Report type = Facet Average, Field Variable = Total Surface Heat Flux, Surface = my interface Water/PCM

My questions are:

Is my method a good way to estimate the heat flux trough the interface Water/Pcm?

What is the unit of the heat flux measure? In fluent I see that heat flux is in W/mē, but if I have selected the entire surface in the report file, does it show me the average heat flux per mē of that surface (Watt/mē), or the average heat flux on the entire surface (in Watt)?

Finally, as I work with a 10 Sec time step, and fluent write the report file each step, does the measure is the average heat flux for the 10 seconds time period or the heat flux of the 10th second?

I hope that will understand what I'm trying to do.

As a French engineering student, I am not an expert in CFD and not so good at English, so sorry for that.


Best regards,

Mathieu C
MathieuCrslt is offline   Reply With Quote


fluent, heat flux, measure, pcm, report monitor

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hi please tell me how can calculate heat flux in duct ? is draw line on surface ? reslan FLUENT 0 February 26, 2016 16:27
Define heat flux on surface by using UDF alnossory FLUENT 0 July 9, 2015 05:53
Total Surface Heat Flux cfmyd FLUENT 0 June 27, 2014 16:00
heat flux on solid surface in conjugate heat transfer skuznet OpenFOAM Pre-Processing 0 December 10, 2013 00:36
chtMultiRegionFoam heat flux sailor79 OpenFOAM Running, Solving & CFD 0 September 27, 2013 08:08

All times are GMT -4. The time now is 04:04.