SimScale CAE Forum

Heat transfer analysis


#1

Good mornig, my name is Bernardo and I am a mechanical engineering student at UFF in Brazil. I’m a member of my university’s formula SAE team and I’m the cooling system’s responsible.
So, I’m trying to simulate our heat exchanger using the conjugate heat transfer method. But when i generate the mesh I lose the option to assign properties both physical and boundary conditions) to my geometry, it happens when a message apears asking to use the mesh as the domain. What am I doing wrong?
https://www.simscale.com/projects/berna1549/troca_de_calor_2019-2/


#2

Just say Yes, use mesh as domain and you should be good to go… (I think), otherwise please share your project link…


#3

Hi Dale, here’s the project link. What is happening is, after I choose to use the mesh as the domain, my heat exchanger disappears. Thank you for your attention.


#4

Hi @berna1549!

You have to paste the link into your post - please keep this in mind for future posts. Makes things so much easier, thanks! :slight_smile:

Jousef


#5

Hi @berna1549

Just took a look at your project and I found some issues with the mesh settings and the geometry.

  1. The radiator fins have a thickness of around 1e-4m and the current mesh setting cannot capture these features. Thus what you are getting is a mesh of extremely poor quality.

  2. If you want to simulate this problem you need to have 3 solid bodies
    a) Body1- It will be assigned as air and it will contain the other 2 bodies. You will give the velocity inlet and pressure outlet condition on this body.
    b) Body-2, Aluminium fins
    c) Body-3, the fluid that will pass through your radiator.

You have to first work upon your geometry before you start with the conjugate heat transfer analysis.

I am attaching a project for your reference - https://www.simscale.com/workbench/?pid=4584765497003201904&mi=spec%3A9cb938aa-4d22-470b-ae06-8c51b0914089%2Cservice%3ASIMULATION%2Cstrategy%3A35

Thanks
Ani


#6

Thank you for your attention, Ani.
This is my first simulation project, so I’m still learning. I’ll check the reference and as you said, thanks.