I have a heater rod inside a brass rod, which is wrapped by PTFE insulation. The dimensions of the assembly are:
- Heater diameter = 9.5 mm
- Brass rod diameter = 25 mm
- Insulation diameter = 100 mm
When the heater heats the assembly, will the assembly get tighter or looser? The final temperature that the brass rod would reach is 100 °C and the initial temperature is 20 °C.