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RADIATE
17.1
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RADIATE: Specify radiation conditions in heat transfer analyses.
This o ption is used to apply radiation boundary conditions between a nonconcave surface and a nonreflecting
environment in fully coupled therm al-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
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PHYSICAL CONSTANTS option, which is used to define the
Stefan-Boltzm ann constant.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: History data
Level: Step
Reference:
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“Thermal loads,” Section 27.4.4 of the ABAQUS Analysis User’s Manual
Optional parameters:
AMPLITUDE
Set this parameter equal to the nam e of the
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AMPLITUDE option that gives the variation of the
ambient temperature with time.
If this parameter is omitted in an ABAQUS/Standard analysis, the reference magnitude is
applied immediately at t he beginning of the step or linearly over the step, depen ding on the value
assigned to the AMPLITUDE parameter on the
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STEP opt ion (see “Proced ures: overview,”
Section 6.1.1 of the ABAQUS Analysis User’s Manual). If this parameter is omitted in an
ABAQUS/Explicit analysis, the referenc e magnitude given on the dat a lines is applied throughout
the step.
OP
Set OP=MOD (default) for existing
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RADIATE definitions to rem ain, with this option modifying
existing radiation conditions or defi ning additional radiation conditions.
Set OP=NEW if all existing
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RADIATE definitions applied to the model should be removed.
REGION TYPE
This parameter applies only to ABAQUS/Explic it analyses.
This parameter is relevant only for radiation conditions applied to the boundary of an adaptive
mesh domain. If a radia tion condition is applied to a surf ace in the interior of an adaptive mesh
domain, the nodes on the surface will move with the material in all dir ections (th ey 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:
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