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3.7 Plot Panel

The Plot Panel is used to display Primary Variables, Property Variables and Derived Variables at a point; and integrated output corresponding to Boundaries, Derived Surfaces and Interfaces in X-Y Plots. The Plot Panel is activated by clicking Add X-Y Plot in the Toolbar. For example, refer Post Processing-XY Plot.

The menus/icons in the Plot Panel are shown below:

 

• Combine Entity Data into a Single Curve (Plot Together): The data available for a group of selected geometric entities is summed and plotted as a single curve. For example, to plot Mass Flux at inlet and outlet can be summed and plotted as single curve using Combine Entity Data into a Single Curve icon .
• Plot Selected Variables (Individually): Plots the X-Y plot for selected geometric entities and variable of interest using Plot Selected Variables icon .
• Remove: Curves may be removed from the Plot Panel using the Remove All Variables from Plot Icon .
• Reset to Automated Size: The range and position of the curves can be automatically set using this icon .

Note: Double click with the Left Mouse also resets the scale.

• Copy Data: The data in a plot may be copied and pasted into a spread sheet, such as Excel® using the Copy Data Icon .
• Show / Hide Legend: The Legend in the Plot Panel may be toggled on or off using the Show / Hide Legend Icon .

Plot Property The Plot Property dialog box offers the following options for plotting and displaying data: Time Domain Functions Normal Function View: This displays data in terms of the instantaneous values vs. Time (Transient) or Iteration Number (Steady). Moving Average:This displays data in terms of a Moving Average vs. Time (Transient) or Iteration Number (Steady). The value in the Moving Average input is the number of preceding Time Steps (Transient) or Iterations (Steady)over which the variable is averaged.

Figure 3.32 - Plot property

 

Fast Fourier Transform (FFT) This displays a fourier transform of the data. The FFT window options are: None (Rectangular Window) Hann (Raised Cosine) Hamming   Note: The Value in the Fast Fourier Transform (FFT) input is Number of Time Steps (Transient) or Number of Iterations (Steady) used in the FFT.   Display Default Range Allows to explicitly set the Minimum and Maximum range of the X-Y Plots.   Display Units Allows to select the units used in the X-Y Plot. 2nd Axis: Allows to add a 2nd axis in the X-Y Plot.   Variable List List of variables available to plot for a selected geometric entity. The output variables for a particular boundary are listed under output variable of the modules. Minimize Variable List: Minimizes the variable list by clicking the icon .

Figure 3.33 - Fast Fourier Transform   Figure 3.34 - Variable list

 

Zoom the plot

The curves in the Plot Panel can be zoomed in and out using the mouse.

The manipulations include the following options:

• Pan: Right Mouse Button
• Zoom: Roll Middle Mouse Button
• Reset: Double Click Left Mouse Button
• Lasso: Drag Left Mouse Button. The Lasso expands a plot about the selected rectangle. (To return to the full range, the user can double-click on the plot with the Left Mouse Button).

Note: When using the Copy Data Icon , all the data for the displayed variable(s) are transferred, not just the range selected by the Lasso.