23.1.3. Transient Results Tab

The Trn Results tab for the Output Control object contains settings that specify the content of transient results files, and the timesteps at which the files are written. Each transient results file contains results for a particular timestep. The transient results files are written in addition to the full results file that will be written at the end of the transient simulation.

The settings on the Transient Results tab are analogous to those on the Backup tab; for details, see Backup Tab.

 

23.1.3.1. List Box

This list box is used to select Transient Results objects for editing or deletion. Transient Results objects can be created or deleted with the icons that appear beside the list box.

Only one transient results file is written at a given time regardless of how many transient results file objects exist. Each Transient Results object will add information to the transient results file for that timestep. Thus, the resulting transient results file is a union of the data requested by all Transient Results objects for that timestep.

 

23.1.3.2. [Transient Results Name]

 
23.1.3.2.1. Option

See Option.

 
23.1.3.2.2. File Compression

See File Compression.

 
23.1.3.2.3. Output Variables List

See Output Variables List.

 
23.1.3.2.4. Include Mesh Check Box

See Include Mesh Check Box.

 
23.1.3.2.5. File Format Check Box

See File Format Check Box.

 
23.1.3.2.6. Output Equation Residuals Check Box

See Output Equation Residuals Check Box.

 
23.1.3.2.7. Output Boundary Flows Check Box

See Output Boundary Flows Check Box.

 
23.1.3.2.8. Output Variable Operators Check Box

See Output Variable Operators Check Box.

 
23.1.3.2.9. Extra Output Variables List

When the Extra Output Variables List is selected, you can specify any variable that is not included in the results file by default. For more details, see Variables in Ansys CFX in the CFX Reference Guide.

 
23.1.3.2.10. Output Particle Boundary Vertex Fields Check Box

See Output Particle Boundary Vertex Fields Check Box.

 
23.1.3.2.11. Output Frequency

See Output Frequency Options.

 

23.1.3.3. Transient Blade Row Results

Transient Blade Row Results settings are available when there is at least one disturbance defined in the details view of the Transient Blade Row Models object.

You can control the output of variables related to the Transient Blade Row model via the following settings:

  • Option

    Choose the level of output: Essential, Selected Variables, or None.

  • File Compression

    Choose the level of file compression as a trade-off between file size and speed.

  • Output Variables List

    This setting is required for the Selected Variables option.

    You can multi-select variables from a list (using the Ctrl key) to have them added to the output.

  • Extra Output Variables List

    This setting is available for the Essential option.

    You can multi-select variables from a list (using the Ctrl key) to have them added to the output.

Data compression is based on a Fourier series. The Data Compression settings control the number of Fourier coefficients to store in the output and the portion of the simulation over which these coefficients are accumulated.

You can specify the number of Fourier coefficients to be stored in the output.

The Accumulate at Period setting controls when the Fourier Coefficients should start being accumulated. The available options are:

  • Moving Averages

    The solver continuously accumulates and updates Fourier Coefficients during the run.

Note:  Once you have specified the output for transient blade row results, there is no need to create intermediate transient results files.

For instructions on setting up and using Transient Blade Row models, see Transient Blade Row Modeling in the CFX-Solver Modeling Guide.