Reducing mesh size along z-axis for 3D conjugate heat transfer problem
 

Hi everyone :)


I am attempting to model a single fin of a heat sink, surrounded by air, as a conjugate heat transfer problem. As it is only a single fin, my domain is much larger in the x and y directions than it is in the z.


My problem is that I cannot get a fine enough mesh size in the z-direction to capture the boundary layer without making my entire mesh tiny, which I cannot really afford to do.


I have tried using edge sizing with hard behavior, with multizone, tetrehedral and even hex-dominant methods, but the size doesn't permeate through the whole domain. If I use inflation, ANSYS I can't the overall thickness to what I need it to be.



Is there a setting I am missing or is this approach completely inappropriate? I can upload a picture of the domain if it will help.


Cheers!

Go ahead with that image ;)

http://imgur.com/TVEeDeo

This is the domain I have, please let me know if there's anything else that will help :)

Domain
 

Attachment 77454


It appears that my previous reply didn't link the image properly, hopefully this works, thanks :)