Constitutive law for the heat exchange by mutual radiation between surface elements of solids (for element RAYON)
This law is only used for non linear thermal analysis of solids.
This constitutive law allows to consider heat exchange by radiation between elements pertaining to the surface of a solid.
Prepro: LECHRA.F
Lagamine: ECHRA.F
| Plane stress state | YES |
| Plane strain state | YES |
| Axisymmetric state | YES |
| 3D state | NO |
| Generalized plane state | YES |
| Line 1 (2I5, 60A1) | |
|---|---|
| IL | Law number |
| ITYPE | 126 |
| COMMENT | Any comment (up to 60 characters) that will be reproduced on the output listing |
None
| Line 1 (G10.0) | |
|---|---|
| PLANCK | PLANCK's constant (given in the appropriate system of units) |
2
| SIG(1) | heat flow exchanged by radiation neglecting the view factor between the surface elements |
| SIG(2) | same as above but taking account of the view factor between surface elements multiplied by the area |
3
| Q(1) | temperature of the first radiating point $(=T_1)$ |
| Q(2) | temperature of the second radiating $(=T_2)$ |
| Q(3) | $\sigma* \left( T_1^3 + T_1^2 T_2 + T_1 T_2^2 + T_2^3\right)$ |