Defining a Stagnation Inlet

You can create a flow inlet that specifies the volume of fluid that enters the fluid domain in terms of the stagnation pressure.

See Also
About Inlets
Defining the Fluid Physics of a Flow Simulation
In Other Guides
Editing Simulation Features
  1. From the Boundaries section of the action bar, click Stagnation Inlet .
  2. Optional: Customize the default Name of the inlet.
  3. Select the surface where fluid enters the domain.
  4. Specify the magnitude and direction of the flow through the inlet. The following options are available for specifying direction:
    OptionDescription
    Normal Flow direction is normal to the opening.
    Specified Flow direction follows a custom vector that you specify. You can choose a direction in the global axis system, a local axis system, or an axis system that you specify in the app.
  5. Specify the Temperature of the fluid flowing into the inlet.

    You can use a single uniform value, spatially-varying mapped data, or a JavaScript user subroutines that defines the value programmatically.

    In addition, you can apply a scale factor or amplitude to the value. Click , then specify either or both of the following:

    OptionDescription
    Scale factor A multiplier that is applied to the magnitude of the value in the step.
    Amplitude Name of the amplitude curve that defines the magnitude of the value during the step.
  6. Choose a Turbulence specification and customize its settings to define the turbulent flow at the inlet. The following turbulence specifications are available:
    OptionDescription
    Viscosity ratio Define turbulence by specifying the eddy viscosity ratio.
    Intensity - Length scale Define turbulence by specifying the turbulence intensity, characteristic length scale, and velocity scale.
    Turbulent viscosity Define turbulence by specifying the kinematic eddy viscosity.

    The specific turbulence customization settings that appear depend on your choice and on the turbulence model you chose in the physics definition. For a full description of all available turbulence settings, see Initial Turbulence Options.

  7. For compressible flow simulations, specify the Supersonic static gauge pressure of the fluid at the inlet. The solver applies this pressure value locally if the flow becomes supersonic.
  8. For multispecies flow analyses, you can also specify the mass fraction of the materials flowing through the inlet. For more information, see Defining Mass Fractions at an Inlet.
  9. For a multiphase simulation using the Volume of Fluid (VOF) method, you can also specify the material distribution flowing through the inlet. In addition, gravity waves can be specified as part of the material distribution. For more information, see Defining Volume Fractions at an Inlet
  10. If surface-to-surface radiation is active, you can specify the radiation behavior at the inlet. For more information, see Defining Surface-to-Surface Radiation Behavior at an Inlet.
  11. If particle physics are active, you can specify how the particles interact with the inlet. For more information, see Defining a Particle Boundary.
  12. Click OK.