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Under Results > Plots > XY Plot > Set up

Make sure that under Y-Axis Function, you see Pressure...and Static Pressure. Under Surfaces, select centerline and wall. Click Plot. By default FLUENT displays the plots using graphics but we will modify them to display lines which can be more helpful when analyzing the plot.

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On the XY Plot window click on the Curves button. Change the Pattern to a line, Select a blank as a Symbol and change the Weight to any number greater than 2. To do this for multiple curves use the arrow buttons to navigate through the different curves displayed on the plot.

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Let's plot the variation of Mach number in the axial direction at the axis and wall. In addition, we will plot the corresponding variation from 1D theory. You can download the file here: mach_1D.xy. This file is a text file. You can look at the format of this file by reading it into Wordpad.

Plot > XY Plot. Under the Y Axis Function, select Velocity... and Mach Number.

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