Specify Project Fluids and Default Fluids

On the Fluids tab you can change the fluid type as well as add, remove or replace the fluid substance.

To specify the project fluids and default fluids:

Procedure

  1. In the Fluids list, click  at the left of fluid type name to display the list of fluids of this type available in the Engineering Database.

    If you discover that the required fluid is not available, click New and add the new fluid to the Engineering Database.

    See “Fluid types” for list of available fluid types.

  2. Select a fluid from the Fluids list and click the Add button.

    -or-

    Double-click the desired fluid in the Fluids list.

    The selected fluids will be added to the Project fluids list. The Project fluids list displays fluids that are available for the current analysis.

    To remove a fluid from the analysis select it in the Project fluids list and click the Remove button.

    To replace one of the project fluids (in the General Settings dialog only), select a fluid you want to add in the analysis in the Fluids list and a fluid you want to replace in the Project fluids list, then click the Replace button.

  3. If you have added more than one fluid, specify default fluids and/or Default Fluid Type in the Project fluids list.
    • If you have added fluids of different types to the Project fluids list, you must select the Default Fluid Type, which is assigned by default for all fluid regions in the analysis. Only fluids of this type will be available to be assigned as default project fluids. The selected fluid type is assigned by default for all fluid regions in the analysis.

      Tip

      You can specify another fluid type for a specific fluid region using the Fluid Subdomain feature (see “Fluid Subdomains” for details).

      Note:

      If the desired fluid type is not available for selection this means that no fluids of this type are in the Project fluids list. In this case you should add the required fluids of this type by selecting them in the Fluids list and clicking Add.

    • If you have added more than one fluid of the same type to the Project fluids list, you can select which of them will be assigned as default fluids for all fluid regions by selecting check boxes at the right of each fluid’s name.

      Restriction:

      Note that you can not assign multiple Real Gases or Real Gas together with Steam as default fluids.

      Default fluids’ concentrations are specified on the Initial conditions (Initial and ambient conditions for External analysis) tab of the General Settings dialog and assumed equal by default.

      Tip

      You can assign other fluids for a specific fluid region using the Fluid Subdomain feature. Note that only fluids specified in the Project fluids list will be available for selection (see “Create a Fluid Subdomain” for details).

      If you have already specified one or more Fluid Subdomains, their settings will be retained.

  4. Depending on the Default fluid type, you can also specify the desired Flow Characteristics (see “Flow Characteristics” for details).
  5. If you are finished specifying parameters on the Fluids tab:
    • In the Wizard dialog, click Next or click a link on the Navigator pane to switch to the corresponding tab of the Wizard.

    • In the General Settings dialog, click Apply to update and proceed with settings.

      - or -

      Click OK to apply the changes and exit the dialog.