Transient Conduction in a Sphere

2D Axisymmetric Model: Tips

The following video outlines the approach used while modeling conduction in a sphere using an axisymmetric approach.

Geometry creation tips:

Tips on meshing, physics setup and numerical solution:

Tips on post-processing:

Transient conduction can create large data files since by default, Ansys stores temperature values at all nodes at each time step. This can result in large data files if you have a lot of nodes and/or time steps. It is advisable to save at equally spaced time intervals by selecting the option below. Adjust the value to get data files of a reasonable size.

When saving your project after you are done, you can create a small project file using the trick shown in the following video. Also, the solve times could be long (more than 20 minutes for this problem) if you have a lot of nodes and/or time steps. This is because a stiffness matrix inversion is involved at each time step. In contrast, in the steady case, there is only one stiffness matrix inversion for a linear problem, which is what we have here.

3D Model: Tips

Geometry and meshing tips:

Postprocessing tips:

When saving your project, use the .wbpz format and don't save results as discussed above. This will ensure a small project file.