[zdunol]

and what about thermal boundary condition for fluid domain walls? ;(

[macfly]

If Fluent doesn't automatically create a wall/wall-shadow, you have to redo the mesh, zone definition, etc., until you get a wall/wall-shadow.

[macfly]

Originally Posted by zdunol

and what about thermal boundary condition for fluid domain walls? ;(

The thermal conditions for both wall/wall-shadow are set to 'coupled' by default and you keep it like that, see picture.

[Marta]

Hi guys! I read about the problems you had with simulating a coupled conduction-convection problem in fluent.
By making several attempts, before reading your posts, i found out that no thermal exchange between fluid and solid is visible with the pressure-based solver (I only have standards interfaces between solid and fluid and the problem was well solved in a steady state fashion), but if I use the density based, then something seems to happen.
Did you notice simething like this in your cases?

[andreystephan]

hello this is the first time i write in this forum, and i have just join.
i have problem with Ansys Fluent about heat transfer between solid material ( the isolation, the collector) and outside environment. in the inside of solar collector there are carbon to adsorb methanol form the evaporator. i am using 2D transient model. the iterating process did work but the result didn't occur. could anyone give any suggestion or help.

best regards

[sarawong]

hello all,
I am trying to design a shell and tube heat exchanger and am using hypermesh to mesh a section of it. I define all my zones and faces as explained in previous posts to this thread, but when I bring the case into fluent, the shadow zone does not get created for the pipes. therefore, when i try to run it, there is no heat transfer. i have tried different meshing methods in hypermesh, but can't get the shadow zone to appear. does anyone have any tips or suggestions?

[a_Sarlak]

Originally Posted by sarawong

hello all,
I am trying to design a shell and tube heat exchanger and am using hypermesh to mesh a section of it. I define all my zones and faces as explained in previous posts to this thread, but when I bring the case into fluent, the shadow zone does not get created for the pipes. therefore, when i try to run it, there is no heat transfer. i have tried different meshing methods in hypermesh, but can't get the shadow zone to appear. does anyone have any tips or suggestions?

Hi sara
to couple walls you should define the interface as wall in Gambit and mesh both (solid and fluid) zone. Note that you should have only one surface between domains and define it as a wall. when you are read mesh file in fluent, Fluent add another wall as shadow wall. if you see the shadow wall in fluent, the heat transfer between solid and fluid is coupled.if u dont see the shadow go to wall interfaces in fluent and select the wall between two zone and shadow will appear.good luck

[zulfikar]

Hi every one
I want to ask how to in put sulfinol and steam material in fluent

[lilweasel]

I'm having this same issue in StarCCM+. I have a cylindrical sample emitting total heat of 500 W in a cylindrical case filled with air. There is no heat transfer between the air and the cylindrical case (fluid to solid regions).
Has anyone had this issue in StarCCM+ and found a solution?
There are interfaces between all mating surfaces with conjugate heat transfer applied.

Thank you!

[mskmanj]

hello every one,
i face problem there is no heat convection between solid zone and fluid zone.
i design a plate heat exchanger,
creat mesh in ICEM
import in fluent and define the boundary condition and also shadow surface as coupled but there is no heat transfer between the two zone.
one side is hot fluid on other side is cold fluid but no transfer of heat from hot to cold fluid through solid zone. Solid zone is steel and fluid is water.
so please gib=ve some suggession on it.

[nishi]

Hello,

I am new to fluent and am trying to model continuous casting.A shadow wall is being created by fluent in the two region interface.The contact resistance should be applied to the shadow wall or the inner wall in order to model the conduction between mould and billet.

[KaLium]

You can make new coupled wall between solid-zones in Fluent. You don't have alter the mesh.

Just use the text-command mesh/modify-zones/slit-interior-between-diff-solids.

After this, you have to change the thermal option in these new walls (and shadow walls) to coupled.

[nishi]

Sorry for re-posting!
There are two zones in my model,fluid and solid,a shadow wall is created between them automatically by fluent. Now my question is whether i should assign the shadow wall with material properties of solid or fluid?

[KaLium]

Originally Posted by nishi

Sorry for re-posting!
There are two zones in my model,fluid and solid,a shadow wall is created between them automatically by fluent. Now my question is whether i should assign the shadow wall with material properties of solid or fluid?

If there is nothing between your two zones, put same options for both wall and shadow-wall:
- coupled heat
- thickness 0 m (-> materiar properties don't matter)

Problem is more complex if you want to model some thin layer between your zones.

[nishi]

Originally Posted by KaLium

If there is nothing between your two zones, put same options for both wall and shadow-wall:
- coupled heat
- thickness 0 m (-> materiar properties don't matter)

Problem is more complex if you want to model some thin layer between your zones.

Thank u

[Satyam]

Can anyone suggest any video tutorial depicting simple heat transfer between solid and fluid zones in Ansys Fluent. In my simulation there seems to be no heat transfer between fluid and solid. I have already tried with coupled wall but that doesn't seem to work.

[mojtaba.safdari.ms@gmail.]

check your units, when u import mesh to fluent it consider the units as meter

[sandeep_20]

Good morning mohammad sir

I'm also facing the same problem. I'm working on a solidification model. I have filled liquid metal in the cavity with the solid. Two wall (one wall and wall shadow) are there. I have coupled them in thermal tab. I have given constant density, Sp. heat capacity and all other properties. One of the property as thermal conductivity I have given variation with temperature.
But there are no heat transfer after calculation.

Please guide me and give your valuable suggestions.

Thanks & Regards
Sandeep