Learning Forum

[Lithoman]

Hello, ANSYS 
I am using the Transient thermal and structural modules to create a model to verify thermal deformations of very small change (sub-nm).

Currently, the minimum size of the model I am trying to study is 26 mm * 33 mm. The shape of the model is very simple, but I am having a very hard time with the heat flux because I am giving the heat in 10 nm increments in the x coordinate as shown below.

What I am trying to ask is, 
In order for the simulation to recognize the heat flux at those 10 nm intervals, is it an absolute requirement to have a mesh of a reasonable size? such as 10 nm size element?

Also, as a student, my simple heat loading question is that as the size of the heat load applied increases, the size of the deformation in the model increases, and I would appreciate if you could explain the reasoning behind this.

I would love to discuss any other approaches or solutions to implementing heat fluxes as low as 10 nm spacing into a 26 mm wide model.

Thank you.

 

         

 

 

[Erik Kostson]

Hi
If you have such a variation in heat flux like you show in the colourful last image in your post, then we need to have  small enough mesh size to capture that - imagine if you had only one element across that variation it would not of course be possible to capture it.
Hope this helps
Erik