How to model a very thin layer

[maheshh]

Hello,

I am trying to model a very thin layer of interface between two metal bodies. The modeling purpose is to see how this thin layer affects the heat transfer from one metal body to the other. For folks who are in the field of electronics packaging, I am trying to model the thermal interface material between the die and heatsink.

The layer thickness is only 0.02 mm. How can I model this thin layer?

Following is one approach I think could be possible:
Use shell131 element (SECTYPE shell) and assign it certain number of layer using SECDATA. Also, since it is directly attached to the underlying solid (die) I can use KEYOPT(6) ("paint" option) where TBOT = TEMP.
To simulate the other side of the layer, I can couple the temperature DOF TTOP with TEMP of heatsink.

IS THIS APPROACH TO MODELING CORRECT?

Any other suggestions will be very helpful.

Regards,

Mahehs.

 

[maheshh]

Can somebody please give me some ideas as to how I can model a thin layer in Ansys?
Again, the max dimension in my model is @80 mm and this thin layer is of the order of few microns. I am thinking of something like 0.02 mm.
Any inputs will be helpful.

Mahesh.

 

[Koruin]

Hello Mahehs!

I have a simulate problem like you. I have to model a thin layer over substrate. I simulate a tensile test. The substrate and the film have different
The first layer has a 125 micron thickness (substrate).
The second layer is a 80 nanometer thick metal film.
The structure is 6mm wide, and 20mm long.
There is a big difference in the dimesions. ANSYS have only 32000 Elements, and i can not mesh all with 3d-solid elements.
Please give me a tipp, which elements i could use...

Regards,
Koruin
Student in Major Mechanical Engineering
Universität Stuttgart