Specify surface radiation
conditions in heat transfer analysis.
This option is used to apply surface radiation boundary conditions between
a nonconcave surface and a nonreflecting environment in fully coupled
thermal-stress analysis or to define an approximate cavity radiation
interaction. In
Abaqus/Standard
it is also used for heat transfer, coupled thermal-electrical, and coupled
thermal-electrical-structural analyses.
It must be used in conjunction with the
PHYSICAL CONSTANTS option, which is used to define the Stefan-Boltzmann
constant.
Set this parameter equal to the name of the
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 the beginning of
the step or linearly over the step, depending on the value assigned to the AMPLITUDE parameter on the
STEP option (see
Defining an Analysis).
If this parameter is omitted in an
Abaqus/Explicit
analysis, the reference magnitude is applied immediately at the beginning of
the step.
OP
Set OP=MOD (default) for existing
SRADIATE definitions to remain, with this option modifying existing
radiation conditions or defining additional radiation conditions.
Set OP=NEW if all existing
SRADIATE definitions applied to the model should be removed.
Data lines to
define surface radiation conditions
First line
Surface name.
Radiation type label R.
Reference ambient temperature value, .
(Units of .)
Emissivity, .
Repeat this data line as
often as necessary to define radiation conditions for different
surfaces.
Data lines to
define approximate cavity radiation (available only in
Abaqus/Standard)
First line
Surface name.
Radiation type label AVG.
Leave this field blank.
Emissivity, .
Repeat this data line as
often as necessary to define radiation conditions for different
surfaces.