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Does the flow become fully developed at the end of the first section?

Centerline Temperature Plot

Now let's look at the temperature variation along the center-line of the pipe. To do this we need to first create a center-line:

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Moving on, please select the Data Series tab. This tab will help us specify the source of the chart data.  Change the name of the first data series from Series 1 to FLUENT. Under Data Source, specify Centerline as Location. Click Apply. On top of this would would also like to plot the experimental data, which can be downloaded here. Download it to a directory of your choice. Now, click a new data series Image Removed. Name it "Experiment". Under Data Source, select File and browse for the downloaded experimental data.

Now that we have our data sources, we will proceed by specifying the axes. We want to see the variation of temperature with the length of the pipe. Therefore, temperature will be on the y axis of the chart and x-position on the x axis of the chart. We will start by defining the X-axis:

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