To Define Radiation Condition
1. Click
Home >
Radiation Condition. The
Radiation Condition dialog box opens.
2. Type a name for the boundary condition or accept the default name.
3. Select an existing boundary condition set from the Member of Set list, or click New to display the BC Set Definition dialog box and create a new boundary condition set.
4. Select the surfaces associated with the radiation. You can select
Individual,
Boundary or
Intent surfaces of your model. You can also select a surface set. If you have already selected the geometric entity before opening the
Radiation Condition dialog box, your selection appears in the
References collector when the dialog box opens.
5. Click Advanced to display the Spatial Variation and Temperature Dependence options of Emissivity (Ɛ).
7. Select the
Function of Temperature option from the
Temperature Dependence drop-down list if you want emissivity to vary as a function of temperature. The
Radiation Condition dialog box expands to display the
button. Click this button to open the
Function Definition dialog box. Specify the function over the temperature range.
8. Type a value between 0 and 1 for the emissivity (ε) in the Value box.
9. Type a real number value for the
Ambient Temperature in the
Value box. Select the units from the drop-down list or accept the default unit.
10. Click Preview Ɛ to check the spatial variation of emissivity (ε).
11. Click OK.