Abaqus: Heat is not flowing from the surface

[Farhan Asif]

I am trying to see the temperature distribution of a rectangular section having an internal hole. The surface of the hole is at a fixed temperature and the outer surfaces of the section have convection boundary conditions. when I am placing the whole in the middle of the section, the heat is not flowing. But if I place the hole at the end, everything works fine. What is the problem? How should I solve this problem?

 

[FEA way]

Are you sure that the hole was created properly (by boolean cut) and that it's not actually modeled as a solid cylinder placed inside a box ?

Can you share the file ?

 

[Farhan Asif]

Here is the file. Thank you in advance

 

[FEA way]

The geometry itself is correct. Can you share the .cae file too ? Something must be wrong with the analysis setup.

 

[Farhan Asif]

Here you go.

 

[FEA way]

It seems that for some reason Abaqus recognizes this geometry incorrectly and generates a mesh also for the cavity. How exactly did you create this part (in which CAD software and with what 3D modeling operations) ?

 

[Farhan Asif]

I created this part using SolidWorks. At first, I drew a rectangle and made a square-shaped hole. Then I drew two more rectangles on the opposite faces of the previous rectangle.

 

[FEA way]

Clearly, this geometry is incorrectly recognized by Abaqus, you can see it already when assigning a section, for example - Abaqus shows two cells.

Try recreating this geometry, possibly in Abaqus and using boolean operation (cut one part representing the cavity from the large box).