you could use a slice of your component and use two sides of it with a symmetric boundary condition assuming that the loads and the boundary conditions are symmetric as well. In Paraview you could then use the filter Rotational Extrusion in order to get a 360° revolution of your component.
Another option would be to prescribe a displacement of 0 for the direction of the symmetry plane.
Example #1: Hertzian Contact Between 2 Spheres
Example #2: Rubber seal sliding analysis MLarreta
Example #3: Axisymmetric pressure vessel
Feel free to share your model here so that we can have a look at your heat transfer problem.