Defining pneumatic fluid cavity property options

Pneumatic fluids must include an ideal gas molecular weight; and, for an Abaqus/Explicit analysis, they may include molar heat capacity data. For more information, see Pneumatic fluids.

  1. From the main menu bar, select InteractionPropertyCreate.

  2. In the Create Interaction Property dialog box that appears, do the following:

    • Name the interaction property. For more information about naming objects, see Using basic dialog box components.

    • Select the Fluid cavity type of interaction property.

  3. Click Continue to close the Create Interaction Property dialog box.

    Abaqus/CAE opens the Edit interaction property dialog box.

  4. Choose the Pneumatic fluid definition.

  5. Enter the Ideal gas molecular weight.

  6. For an Abaqus/Explicit analysis, toggle on Specify molar heat capacity, if desired, to include heat transfer data.

  7. If you are specifying molar heat capacity, select either Polynomial or Tabular for the data type.

  8. If you chose Polynomial in the previous step, enter coefficients for the five terms in the polynomial equation—enter zero for any terms that are not needed. If you chose Tabular in the previous step, do the following to complete the data table:

    1. Toggle on Use temperature-dependent data to define fluid expansion that varies with temperature. A column labeled Temp appears in the data table.
    2. To define fluid expansion that depends on field variables, click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables. Field variable columns appear in the data table.
    3. In the data table, enter the molar heat capacity as a function of temperature and field variables. You can enter data into the table using the keyboard. Alternatively, you can click mouse button 3 anywhere in the table to view a list of options for specifying tabular data. For detailed information on each option, see Entering tabular data.

  9. Click OK to create the pneumatic fluid cavity interaction property and to exit the editor.