That sounds like a very interesting project. I agree with @ahmedhussain18, a thermostructural analysis sounds like the best analysis available if you want both temperature and stress fields. If the body has a high conductivity, the body can heat up a lot, causing it to change in shape, and/or resulting in unresolved stress concentration. In such a case, the deformation of the body is also likely to be non-linear, and hence I would suggest you to take non-linear effects into consideration.
But if the body does not have a very high conductivity, and you don’t expect it to change much in shape, I would suggest you perform a Heat Transfer analysis. Since you have not mentioned any structural load is being applied in the simulation, I do not think you need to focus on the stress field.
Also, it is good to keep in mind that the simulation is an Uncoupled thermomechanical analysis. That means that the temperature field is first solved, and then the structural analysis follows, with the temperature field solution being used as a load for the structural analysis. As many materials change their material properties at higher temperatures, acting generally as more viscoelastic in some cases, an uncoupled analysis may not always lead to excessively accurate results.
Hope this helps.