9.7 Defining a spatially varying velocity for fluid boundary conditions

Products: Abaqus/CFD Abaqus/CAE

Benefits: You can now define a spatially varying velocity when you specify inflow and outflow conditions and wall boundary conditions for a fluid dynamic analysis. This enhancement improves the usability of fluid boundary conditions in Abaqus/CAE.

Description: In Abaqus/CAE you can specify a spatially varying velocity for fluid inlet/outlet and wall boundary conditions. Figure 9–4 shows the new Distribution option available for fluid boundary conditions. When velocity is prescribed, arrows that indicate the resultant direction of the velocity are displayed in the viewport, as shown in Figure 9–5 (the arrow size has been increased to emphasize the spatial variation).

Figure 9–4 Specifying a spatially varying velocity for a fluid inlet boundary condition.

Figure 9–5 Symbol display for a parabolic fluid inlet velocity.

Abaqus/CAE Usage:

Load module:
   BCCreate; Category: Fluid
        Type: Fluid inlet/outlet; toggle on Specify: Velocity, Distribution: select analytical field
        Type: Fluid wall condition; Velocity tabbed page, Distribution: select analytical field

References:

Abaqus Analysis User's Manual

“Boundary conditions in Abaqus/CFD,” Section 32.3.2

Abaqus/CAE User's Manual