Mesh connectivity between two contact bodies for thermal analysis

Hello Ayush,

Greetings of the day.

In Marc Mentat, to ensure heat transfer between two contact bodies with different or same meshes during thermal analysis, you must define thermal contact properties specifically, the contact heat transfer coefficient, between the bodies. Without this, heat will not conduct across the interface, even if the bodies are in contact.

You can have a look at the user guide example e080 - Thermal Contact Analysis in a Pipe which will help you.

Regards,

Amol Kumbhar

Hi Ayush,

You can define Thermal Glue contact between the two contact bodies with "Temperature constraint" activated as shown in below image, to maintain constant temperature at the contact interface. If this option is deactivated, heat transfer by conduction takes place which is dependent on the "Contact Heat Transfer Coefficient". Contact HT coefficient is also used for Touching contact as explained in previous response.

Regards,

Kiranraj Shetty

Hi Amol,
thank you for the suggestion. I will surely look at the example and try to apply it in my simulation.

Hi Kiranraj,
Thanks for the reply. I will try that. Just out of curiosity, is it possible to define a single body instead of two bodies and use fine mesh at the top, let's say for a few microns and use coarse mesh for the rest of the body. And for the fine mesh elements use different material material properties than the coarse mesh?

Yes. you can use one part with varying mesh densities ( connectivity must be maintained) with different materials without defining contacts.