Validating the Results

Compare the results against experimental data.

The S-Gamma and non-S-Gamma solutions are validated against experimental data. The experimental data has been provided in two comma-separated values (.csv) files. You import this data in the simulation as tables.

To validate the results:

  1. Right-click the Tools > Tables node and select New Table > File Table.
  2. In the Open dialog, navigate to the multiphaseFlow folder of the downloaded tutorial files, and multi-select the files vAir.csv and voidFraction.csv.
  3. Click Open.
  4. Using the same technique, import the .csv files that you exported in the first part of this tutorial:
    • nonSGamma_vAir.csv
    • nonSGamma_voidFraction.csv.

    The updated Tables node is shown below.



The tabular data is now added to the plots, starting with the Volume Fraction of Air plot:

  1. Select the Plots > Volume Fraction of Air node.
  2. Right-click the Data Series node and select Add Data.
  3. In the Add Data Providers to Plot window, select voidFraction.
  4. Select the Data Series > voidFraction node and do the following:
    1. Set the Legend Name to Experimental.
    2. Set the Table to voidFraction using the drop-down menu.
    3. Set the X Column to r/R.
    4. Set the Y Column to Void Fraction of Air.


  5. Select the voidFraction > Symbol Style node and do the following:
    1. Set the Color to Black.
    2. Set the Shape to Filled Circle.

Add the non-S-Gamma data set to the plot.

  1. Add a tabular data set as described previously and select the NonSGamma_voidFraction data provider.


  2. Select the Data Series > NonSGamma_voidFraction node.

Do the following:

  1. Set the Legend Name to NonSGamma.
  2. Set the Table to nonSGamma_voidFraction using the drop-down menu.
  3. Set the X Column to Line Probe: Normalized Radial Position.
  4. Set the Y Column to Line Probe: Volume Fraction of Air.
  5. Select the NonSGamma_voidFraction > Line Style node and do the following:
    1. Set the Color to a color of your choice. In this tutorial, Blue is used for the non-S-Gamma data set.
    2. Set the Style to Solid.
    3. Select the NonSGamma_voidFraction > Symbol Style node and set the Color to Blue.

Rename the original data set for this simulation.

  1. Select the Volume Fraction of Air > Y Types > Y Type 1 > Line Probe node and set the Legend Name to S-Gamma.

Set the line type for the S-Gamma data set to Solid:

  1. Select the Line Probe > Line Style node and set the Style to Solid.

The Volume Fraction of Air plot appears as shown below.



Add the remaining data sets to the Axial Velocity of Air plot using the techniques described above.

  1. Add the two data sets to the Data Series node in the Axial Velocity of Air plot. Rename one of the data sets to vAir and the other to NonSGamma_vAir.
  2. Right-click the vAir data set node and select Edit.
  3. In the Edit dialog, set the properties as shown in the table below.

    Node

    Value

    Table

    vAir

    X Column

    r/R

    Y Column

    Axial Velocity of Air

    Symbol Style > Color

    Black

    Symbol Style > Shape

    Filled Circle

Do the same for the NonSGamma data set.

  1. Right-click the NonSGamma_vAir data set node and select Edit.
  2. In the Edit dialog, set the properties as shown in the table below.

    Node

    Value

    Table

    nonSGamma_vAir

    X Column

    Line Probe: Normalized Radial Position

    Y Column

    Line Probe: Velocity of Air[i]

    Line Style > Color

    Blue

    Line Style > Style

    Solid

    Symbol Style > Color

    Blue

Rename the original data set for this simulation:

  1. Select the Axial Velocity of Air > Y Types > Y Type 1 > Line Probe node and set the Legend Name to S-Gamma.

Set the line type for the S-Gamma data set to Solid:

  1. Select the Line Probe > Line Style node and set the Style to Solid.

The Axial Velocity of Air plot is shown below.



  1. Save the simulation.