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*DSFLUX
Specify distributed surface fluxes for heat transfer analysis.

This option is used to apply distributed surface fluxes for a fully coupled thermal-stress analysis in Abaqus/Standard and Abaqus/Explicit. In Abaqus/Standard it is also used for heat transfer, coupled thermal-electrical, and coupled thermal-electrical-structural analyses. In Abaqus/CFD it is used for thermal energy (heat) transport and conjugate heat transfer analyses.

Products: Abaqus/Standard  Abaqus/Explicit  Abaqus/CFD  Abaqus/CAE  

Type: History data

Level: Step

Abaqus/CAE: Load module

References:

Optional parameters:

AMPLITUDE

Set this parameter equal to the name of the amplitude curve that defines the magnitude of the distributed fluxes during the step (“Amplitude curves,” Section 34.1.2 of the Abaqus Analysis User's Guide).

If this parameter is omitted for uniform flux types 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 (“Defining an analysis,” Section 6.1.2 of the Abaqus Analysis User's Guide). If this parameter is omitted in an Abaqus/Explicit or Abaqus/CFD analysis, the reference magnitude is applied immediately at the beginning of the step.

For nonuniform flux type SNU (which is available only in Abaqus/Standard), the flux magnitude is defined in user subroutine DFLUX, and AMPLITUDE references are ignored.

OP

Set OP=MOD (default) for existing *DSFLUXs to remain, with this option modifying existing fluxes or defining additional fluxes.

Set OP=NEW if all existing *DSFLUXs applied to the model should be removed.

Data lines to define a distributed surface flux: 

First line:

  1. Surface name.

  2. Distributed flux type label S or SNU.

  3. Reference flux magnitude (units JT–1L–2). This value is needed for uniform fluxes only. If it is given for nonuniform fluxes, it will be passed into user subroutine DFLUX, where the actual flux magnitude is defined.

Repeat this data line as often as necessary to define distributed fluxes for different surfaces.