CST2013: Define Thermal Surface Properties

Simulation: Sources and LoadsThermal Surface

Thermal surface properties can be assigned to surfaces of thermal conductive materials. A thermal surface property definition describes the radiation and convection losses from a surface.

Name

Declare the name for the thermal surface. Each surface must have a unique name.

Radiation properties

Emissivity:

The Emissivity is a dimensionless constant within the interval 0 and 1, which describes the radiation from a previously defined surface:

,

where stands for the radiated power, for the surfaces temperature, for the background temperature, for the Stefan-Boltzmann constant and for the area of the selected surfaces. An emissivity value = 0 means that the surface does not lose thermal power by radiation; a value of 1 means that the surface emits thermal power as good as the so-called ”black radiator”.

Convection properties

Heat transfer coefficient:

The Heat transfer coefficient describes convection processes at the surfaces of conductive materials:

,

where denotes the power, the surfaces temperature, the background temperature and the area for the selected surfaces.

OK

Accepts the changes and closes the dialog.

Cancel

Closes this dialog box without performing any further action.

Help

Shows this help text.