ABAQUS Keywords Reference Manual  

*SRADIATE
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. In ABAQUS/Standard it is also used for heat transfer and coupled thermal-electrical analyses.

It must be used in conjunction with the *PHYSICAL CONSTANTS option, which is used to define the Stefan-Boltzmann constant.

Products: ABAQUS/Standard  ABAQUS/Explicit  

Type: History data

Level: Step  

Reference:

Optional parameters:

AMPLITUDE

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 “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 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:

  1. Surface name.

  2. Radiation type label R.

  3. Reference ambient temperature value, . (Units of .)

  4. Emissivity, .

Repeat this data line as often as necessary to define radiation conditions for different surfaces.