Tracer Study Settings

Allows you to specify the tracers material, the physical model, the options for saving the results, the finishing criteria for terminating the calculation of tracers, initial tracer distribution and the default wall conditions.

Procedure

  1. Open the Tracer Study Settings dialog:

    • In the Flow Simulation Analysis tree, right-click the existing tracer study and select Settings to edit definition of the tracer study.

    The Tracer Study Settings dialog opens.

  2. Under Tracers, select the tracer to be analyzed:

    • Select the tracer from the list of Pre-Defined and User Defined tracers available in the Engineering Database and click Add tracer . This will add it to the Tracer Table. Optionally, you can add more tracers to this table if your problem deals with several admixtures.

    • If you want to add a new tracer to the Engineering Database or edit an existing one, click Create/Edit to open the Engineering Database.

    • To delete tracer from the Tracer Table, select it in table and click Delete Tracer  or Delete All  if you want to clear this table.

  3. Under Physical Features, you can, optionally, consider the Time-dependent analysis to observe the tracer distribution in time.

    • If you consider Time-dependent analysis, specify Calculation Time  and Manual Time Step . If you want to specify a time-dependent value, click Dependency  the right of the parameter value input box (see “Dependency” for details).

      Note:

      The time step specified here is used when discretizing and solving time-dependent equations for the tracers.

  4. Under Saving Results, you can define moments (in seconds or iterations) for saving results during the calculation in case of time-dependent analysis.

    By default, Flow Simulation only saves results from the last time moment.

    • Periodic Saving . If you select this option, the results will be periodically saved during the calculation. This option has the following parameters:

      • Period of Saving  the calculation results.

      • Start Moment  of saving the calculation results.

    • Save Moment . If you select this option, the results will be saved at the moments specified in the List of Time Moments To Save Results.

      To add a time moment to this list, enter its value in the Time Moment  input box and then click Add Save Moment .

      To delete the time moment, select it in the list and click Delete Save Moment  or Delete All  to clear this list.

    • Unit . You can select Physical time or Iterations for specifying the moments at which the results will be saved.

      Note:

      If you select here Iterations, one iteration will correspond to the specified value of the Manual Time Step.

  5. Under Calculation Control, specify the way to stop tracers calculation.
    Restriction:

    This option is available if the Time-dependent option is not selected, i.e. the analysis is steady-state.

    This option has the following parameters:

    • Automatic. If you select this option, the calculation will stop automatically.

    • Maximum iterations. If you select this option, once the defined number of iterations has completed, the calculation will stop. To define the number of iterations, enter its value in the Maximum iterations  input box.

  6. Under Initial Conditions, specify the initial distribution of the tracer with in the whole computational domain.Ifits concentration is varied within the domain, you can specify it as a function by clicking Dependency  to the right of the parameter value input box (see “Dependency” for details).

    • You can also select a reference Coordinate System  to specify a non-uniform concentration distribution.

      The reference Coordinate System selected by default is the Global Coordinate System (see “Global Coordinate System” for details).

      Tip

      You can replace the default coordinate system by selecting your coordinate system in the flyout FeatureManager design tree.

      To create a coordinate system, click Insert > Reference Geometry > Coordinate System.

      If you want to use a cylindrical Coordinate System, select the axis of the specified Coordinate System as the Reference axis. The selected Coordinate System and Reference axis also define a local spherical coordinate system.

  7. Under Default Wall Condition, you can specify whether Condensation occurs on all solid faces in the analysis or not.
    Note:

    This option is available in case you consider a tracer with the saturation parameters specified in the Engineering Database.

  8. Click OK .
Parent Topic: Tracer Studies