*RADIATE
17.1 *RADIATE: Specify radiationconditions in heat transfer analyses.
This option is used to apply radiation boundary conditions between a nonc oncave surface and a nonreflecting
environment in fully coupled thermal-stress analysis. In ABAQUS/Standard it is also used for heat transfer
and coupled thermal-electrical analyses.
It must be used in conjunction with the *PHYSICAL CONSTANTSoption, which is used to define the
Stefan-Boltzmann constant.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: History data
Level: Step
Reference:
•“Thermal loads,” Section 27.4.4 of the ABAQUS Analysis User’s Manual
Optional parameters:
AMPLITUDE
Set this parameter equal to the name of the *AMPLITUDE option that gives the variationof the
ambient temperature with time.
If this parameter is omitted in an ABAQUS/Standard a nalysis, the reference magnitude is
applied immediately at the beginning of the step or linearly overthe ste p, depending on the value
assigned to the AMPLITUDE parameter on the *STEP option (see “Procedures: overview,”
Section 6.1.1 of the ABAQUS Analysis User’s Manual). If this parameter is omitted in an
ABAQUS/Explicit analysis, the reference magnitude given on the dat a lines is applied throughout
the step.
OP
Set OP=MOD (default) for existing *RADIATE definitions to remain, with this option modifying
existing radiation conditions or defining additional radiation conditions.
Set OP=NEW if all existing *RADIATE definitions applied to the model should be removed.
REGION TYPE
This parameter applies only to ABAQUS/Explicit analyses.
This parameter is relevant only for radiation conditions applied to the boundary ofan adaptive
mesh domain. If a radiation condition is applied to a surface in the interior of an ad aptive mesh
domain, the nodes on the surface will move with the material in all dire ctions (they will be
nonadaptive). ABAQUS/Explicit will create a boundary region automatically on the surface
subjected to the defined radiation condition.
17.1–1
ABAQUS Version 6.1 Module: ID:
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