Cooling via Radiation — Welcome to LS-DYNA Examples

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A billet looses heat by radiation from all its surfaces to its surroundings. Example 25 from Introductory Manual for LS-DYNA Users by James M. Kennedy.

Keywords

*BOUNDARY_RADIATION_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_SEGMENT_TITLE
*TITLE

Reduced Input

*KEYWORD
*TITLE
Cooling of a Billet Via Radiation
*CONTROL_SOLUTION
         1         0         0         0
*CONTROL_THERMAL_SOLVER
         1         2         3  1.00e-06         1  1.000000  1.0000004.7500e-13
*CONTROL_THERMAL_NONLINEAR
        20 1.000e-06  0.500000
*CONTROL_THERMAL_TIMESTEP
         1  0.500000  0.100000  0.100000  100.0000  1.000000  0.500000
*CONTROL_TERMINATION
1.3320e+04         0       0.0       0.0       0.0
*DATABASE_TPRINT
  10.00000         0         0         1
*DATABASE_HISTORY_NODE
         1        13        79       265
*DATABASE_BINARY_D3PLOT
  100.0000         0         0         0         0
*PART
         1         1         0         0         0         0         0         1
*SECTION_SOLID
         1         2         1
*MAT_THERMAL_ISOTROPIC
         1  487.5000       0.0       0.0
   0.11000 1.000e+04
*BOUNDARY_RADIATION_SET
         1         1
         04.7500e-13         0  530.0000         0
*INITIAL_TEMPERATURE_SET
         1 2000.0000         0
*SET_NODE_LIST_TITLE
*SET_SEGMENT_TITLE
rad_surf
         1       0.0       0.0       0.0       0.0
*ELEMENT_SOLID
*NODE
*END

Figures

figure_screw_0ms.png

figure_screw_60ms.png

Animated Result

cooling3

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