Thermal Conditions for Walls

The table below provides descriptions of the thermal conditions for walls.


Thermal Condition	Description	Heat flux at the wall calculated from the thermal condition
Insulated	The wall is perfectly insulated (adiabatic).
Heat flux	The heat flux (energy transfer rate per unit area [W/m^2 or equivalent]) is specified. Entering a value of 0 is equivalent to a perfectly insulated boundary.
Heat flow	The heat flow (energy transfer rate [W or equivalent]) is specified.	is the specified heat flow is the area
Temperature	The wall temperature is specified.	The solver discretizes based on the local temperature gradient adjacent to the wall.
Convection	Heat transfer through the wall occurs through external convection. The Convection coefficient and External temperature are specified.	is the specified convection coefficient is the specified external temperature is the wall temperature as computed by the solver
Radiation (external)	Heat transfer through the wall occurs through external radiation exchange with a blackbody having a specified External temperature.	is the external (wall) emissivity is the Stefan-Boltzmann constant is the specified external temperature
Convection and (external radiation)	Heat transfer through the wall boundary occurs through both external convection and external radiation exchange with a blackbody having a specified External temperature and Convection coefficient.	where radiation is defined as is the external (wall) emissivity is the Stefan-Boltzmann constant is the specified external temperature