[entlit]

Hi guys,
Im doing complete temperature and pressure analysis of hydraulic accumulator in ansys fluent. The problem arises when i try to do heat transfer from fluid to cover which is stationary (as seen from picture below). In contact between fluid and piston and cover i have set up a coupled wall, plus boundary conditions are all the same. When the piston is moving the fluid is being compressed so the temperature and the pressure arises. Heat transfer happens between fluid and piston, which is moving, but not between fluid and cover. I am using helium defined as ideal gas.


thanks for the help