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A “Temperature” boundary condition fixes the temperature at the chosen boundary at the specified temperature.

A Temperature boundary condition requires two inputs:

• the geometry of the surfaces where the temperature is fixed
• the magnitude of the temperature in temperature units

“Thermal Convection” specifies the transfer of heat from a surrounding medium.

A thermal convection boundary condition requires three inputs:

• the geometry of the surfaces where the convection is specified.
• the coefficient of convection in convection coefficient units
• the temperature of the surrounding medium in temperature units

Surface “Thermal or Heat Flux” specifies the heat flow per unit of surface area.

A thermal flux requires two inputs:

• the geometry of the surfaces where the heat flux is applied
• the magnitude of the heat flux in surface heat flux units