CFD Online Logo CFD Online URL
Home > Forums > FLUENT

solid-solid conduction with geometry optimization.

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

LinkBack Thread Tools Display Modes
Old   November 24, 2015, 12:08
Exclamation solid-solid conduction with geometry optimization.
New Member
Join Date: Nov 2015
Posts: 2
Rep Power: 0
Pablo86 is on a distinguished road
Hello everyone,

I'm new here and rather intermediate/beginner in CFD. After hours of digging through help and internet I've came up with an idea that the problem I try to solve might not be of simple type.

Firstly, please find attached part of geometry and mesh pictrue:

A heat sink with fluid and two solid plates one after another right behind the sink base. There are three different solid materials in total.

As the mesh is loaded to fluent and material types are set, a notification appears, saying that Warning: zone of type interior found between different solids! As recomended I perform /mesh/modify-zones/slit-interior-between-diff-solids via TUI command and this creates new shadow-zones. Works fine.

Now the problem:
I want to optimize solution in terms of variant geometrical parameters through Response Surface Optimization. Each time I change geometry a new mesh is designed, but once it is loaded to fluent there appears that "mesh information is not compatibile with model information" witch is due to yet not designed shadow-zones, I guess. The mesh is redrawn correctly, so I exclude problems there.

The question is: how to avoid manual setting of /mesh/modify-zones/slit-interior-between-diff-solids and make it automatic for each mesh loaded.

I have already tried:

- to set named selections at connections (faces) between each solid named interior-... and shadows for each. Result: fluent cannot load overlapping selections,

- to set named selections at connections (faces) between each solid named wall-.... Result: shadows were created automaticly, however, despite the fact I've set a coupled thermal conditions, no heat transfer was observed,

- to ignore the Warning what as expected gave incorrect results.

I work on Ansys v. 15

I'm looking badly for some idea.

Best regards,
Pablo86 is offline   Reply With Quote

Old   November 24, 2015, 12:41
Senior Member
ghost82's Avatar
Join Date: Oct 2010
Location: Italy
Posts: 970
Rep Power: 16
ghost82 will become famous soon enough
Hi Pawel,
so the problem is that you are fixing the mesh every time in fluent instead in the preprocessor to have the shadow walls.
From the pictures you attached I think you are using the ansys mesher, which I don't use.
But if you search the forum you can (probably) find some interesting posts about setting a mesh in the preprocessor with coupled walls.

For example:
Two-Sided Wall in FLUENT

Message #6


creating coupled boundary condition to examine conjugated heat transfer

Message #3

Let us know if this solves your problem.
Google is your friend and the same for the search button!
ghost82 is online now   Reply With Quote

Old   Yesterday, 05:18
New Member
Join Date: Nov 2015
Posts: 2
Rep Power: 0
Pablo86 is on a distinguished road
Thanks for quick reply.

The preprocessor creates all the shadow zones at fluid-solid interfaces. The problem is that it does not create them for solid-solid interfaces, what I have to fix manually in fluent.

I have whole model formed as one part and shared topology as well in DM, so unfortunately this does not solve the problem.


ghost82, after your post I've figured out that if whole model is modelled as one part, then it might be the reason why solid-solid shadows do not appear (during preprocessing fluent treasts solids as one body).

So that I've created 3 separate parts, but this is neither a solution (just some additional wall-[number] and contact regions appeard).

Last edited by Pablo86; Yesterday at 09:34.
Pablo86 is offline   Reply With Quote


optimization, solid-solid conduction

Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
geometry from fluent to solid works Samer_Wakim ANSYS 0 August 1, 2015 03:41
how to simulate 2d solid heat conduction using CFX richard CFX 3 March 24, 2008 08:27
Get Free Geometry File -Solid Works Joe Brian Main CFD Forum 0 December 17, 2004 00:25
heat conduction in a solid francesco FLUENT 0 May 27, 2004 18:00
Adaptive optimization of geometry Jan Rusås CFX 1 September 16, 2000 02:38

All times are GMT -4. The time now is 15:13.