EMSVTY
| (Material data) |
|---|
| Last updated on : 30-07-2013 |
EMSVTY Mat, Ftype, Emiss or EMSVTY Mat, Ftype, Ndata
- Temp(1), Emiss(1)
-
:
Temp(Ndata), Emiss(Ndata)
| OPERAND | DESCRIPTION | DEFAULT |
|---|---|---|
| Mat | Material number | None |
| Ftype | Function type: 0 = Constant emissivity 1 = Temperature dependent emissivity | None |
| Emmis | Emissivity | None |
| Ndata | Number of temp/emissivity data pairs | None |
| Temp(i) | Temperature of ith data pair | None |
| Emmis(i) | Emissivity of ith data pair | None |
DEFINITION
EMSVTY specifies the emissivity of a particular object.
REMARKS
The emissivity may be specified as a constant value or as a set of discrete temperature/emissivity data pairs. If Ftype = 1 use the operand Emiss. If Ftype = 2 use the operands Ndata, Temp(i), Emiss(i). Each temperature/emissivity pair should be provided on a separate line. When temperatures lie within the specified data range, linear interpolation is used to determine the corresponding emissivity. When temperatures lie outside the specified data range, linear extrapolation is used to determine the corresponding emissivity. The emissivity is dependent on the material, the surface condition, and the temperature. Its value should be 0 ≤ Emiss ≤ 1. The equation for radiation heat transfer is: | 
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Applicable simulation types: Heat Transfer, Non-Isothermal Deformation