A bar radiates to an ambient temperature at one end and to a constant temperature at the other end. Example 21 from Introductory Manual for LS-DYNA Users by James M. Kennedy.
*BOUNDARY_RADIATION_SET *BOUNDARY_TEMPERATURE_SET *CONTROL_SOLUTION *CONTROL_TERMINATION *CONTROL_THERMAL_NONLINEAR *CONTROL_THERMAL_SOLVER *CONTROL_THERMAL_TIMESTEP *DATABASE_BINARY_D3PLOT *DATABASE_HISTORY_NODE *DATABASE_TPRINT *ELEMENT_SOLID *END *INITIAL_TEMPERATURE_SET *KEYWORD *MAT_THERMAL_ISOTROPIC *NODE *PART *SECTION_SOLID *SET_NODE_LIST_TITLE *SET_NODE_LIST_TITLE *SET_SEGMENT_TITLE *TITLE
*KEYWORD
*TITLE
1D Heat Transfer with Radiation
*CONTROL_SOLUTION
1 0 0 0
*CONTROL_THERMAL_SOLVER
0 1 3 1.00e-06 8 1.000000 1.0000005.6700e-08
*CONTROL_THERMAL_NONLINEAR
20 1.000e-06 0.500000
*CONTROL_THERMAL_TIMESTEP
1 0.500000 1.000e-04 1.000e-04 0.100000 1.000000 0.500000
*CONTROL_TERMINATION
1.00000 0 0.0 0.0 0.0
*DATABASE_TPRINT
1.000000 0 0 1
*DATABASE_HISTORY_NODE
11 22 33 44 55 66 77 88
99
*DATABASE_BINARY_D3PLOT
1.000000 0 0 0 0
*PART
1 1 0 0 0 0 0 1
*SECTION_SOLID
1 2 1
*MAT_THERMAL_ISOTROPIC
1 7850.000 0.0 0.0
460.0000 55.6000
*BOUNDARY_TEMPERATURE_SET
1 0 1000.000 0
*BOUNDARY_RADIATION_SET
2 1
05.5566e-08 0 300.0000 0
*INITIAL_TEMPERATURE_SET
3 300.0000 0
*SET_NODE_LIST_TITLE
A
1 0.0 0.0 0.0 0.0
1 12 23 34 45 56 67 78
89
*SET_SEGMENT_TITLE
B
2 0.000 0.000 0.000 0.000
55 22 11 44 0.000 0.000 0.000 0.000
66 33 22 55 0.000 0.000 0.000 0.000
88 55 44 77 0.000 0.000 0.000 0.000
99 66 55 88 0.000 0.000 0.000 0.000
*SET_NODE_LIST_TITLE
central
3 0.0 0.0 0.0 0.0
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48
49 50 51 52 53 54 55 56
57 58 59 60 61 62 63 64
65 66 67 68 69 70 71 72
73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88
89 90 91 92 93 94 95 96
97 98 99
*ELEMENT_SOLID
*NODE
*END
