Face

Configure the thermal boundary conditions for the Fluids simulation.

  1. On the Fluids ribbon, select the Face tool.
  2. In the guide bar, select to create the thermal boundary condition for Solids or Fluids.
  3. Enter values for Ambient Temperature and Ambient HTC.
  4. Select a surface that is not an inlet or an outlet.
  5. In the microdialog, select a Boundary condition for the face:
    Face Type Boundary Conditions
    Solid
    • Temperature
    • Convection
    • Heat Flux
    Fluid
    • Temperature
    • Convection
    • Heat Flux
    • Adiabatic
    • Slip Wall
  6. Based on the boundary condition you selected, follow the relevant steps below.

Temperature

Define the temperature of a selected surface to change the temperature of the fluid when it encounters that surface.

  1. Select one or more surfaces where you would like to specify a fixed temperature.
  2. In the microdialog, enter the Temperature.
    The same temperature will be applied to all selected surfaces.

Convection

Define the heat transfer coefficient and ambient temperature of a selected surface to change the temperature of the fluid when it encounters that surface.

  1. Select one or more surfaces where you would like to specify a convective heat flux.
  2. In the microdialog, enter the HTC (heat transfer coefficient) between the solid surface and ambient fluid.
  3. Enter the Ambient Temperature of the fluid adjacent to the solid surface.

Heat Flux

Add a flow of energy per unit of area per unit of time to a selected surface to change the fluid's temperature when it encounters that surface.

  1. Select one or more surfaces where you would like to add the heat flux.
  2. In the microdialog, enter the Heat Flux.

Adiabatic

Define a thermally insulated surface.

  1. Select the surface where you want to add the adiabatic thermal condition.
  2. Right-click and mouse through the check mark to exit, or double-right-click.

Slip wall

Enable the Slip Wall condition to allow the fluid to slip along the surface.

  1. Select the fluid faces or surfaces where you would like to add the slip wall condition.
  2. In the microdialog, enable Slip Wall.

Ambient Temperature

Ambient thermal conditions are applied to all exterior facing solid faces participating in the simulation. Ambient temperature is the temperature of the air surrounding solid surfaces in the model.

In the microdialog, enter a value for Ambient Temperature.
The Ambient Temperature boundary condition is applied to the air surrounding the model.

Ambient Heat Transfer Coefficient

Ambient thermal conditions are applied to all exterior facing solid faces participating in the simulation. The Ambient Heat Transfer Coefficient value determines the amount of heat transfer between solids and the surrounding air.

In the microdialog, enter a value for Ambient Heat Transfer Coefficient.
The Ambient Heat Transfer Coefficient boundary condition will limit the amount of heat transfer allowed between solids and the surrounding air.