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You need to repeat the FLUENT simulation with inputs from YOUR MEASUREMENTS in the lab. A sample comparison is shown below. The experimental data can be downloaded here.
You can export the data by clicking on the Export button in "Details of centerline temperature", as shown in the previous step. |
Pressure Plot
Now let's us look at the pressure variation at the centerline. We can use the center-line we created earlier.
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Now click on Data Series tap to specify the location of the chart data. Change the name of the first data series from Series 1 to FLUENT. Under Data Source, specify Centerline as Location. The centerline was already created while doing the temperature variation along the center-line. If that chart was skipped please refer to that section on how to create a centerline.We would also like to compare our simulation result with experimental data. Experimental data is can be downloaded here.
Our purpose in this exercise is to study the pressure variation along the length of the pipe. Therefore our chart should show pressure in the y-axis and x-position in the x-axis. In this case, our x-axis variable is x and our y-axis variable is pressure.
We want to the chart to be displayed exactly the same way as for wall temperature and centerline temperature plots.
The FLUENT result is shown in the Graphics window.
| Info | ||
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You need to repeat the FLUENT simulation with inputs from YOUR MEASUREMENTS in the lab. The experiment data can be downloaded here. A sample comparison is shown below.
You can export the data by clicking on the Export button in "Details of centerline temperature", as shown in the previous steps. |
Axial Velocity Profile before and after Heated Section
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Continue the same step for creating line Outlet (x=6.045m).Now we will have enough interval to look at the flow development before and after the heating. Let's create a chart to investigate this.
Insert > Chart
Enter "Second Section Axial Velocity Profile" as Name. You will see Details of Second Section Axial Velocity Profile appear on the lower left panel. Under General, give the chart Title as "Axial Velocity Profile".
Now click on Data Series tap to specify the location of the chart data. Under Data Source, specify Preheat 3 as Location for the first data series. Change the name to x=1.8m. Continue adding Data Source until we added all Preheat 3, Postheat 1, Postheat 2, and Outlet. Name them according to the figure shown below.
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What we notice when comparing fully developed flow before and after heated section is that the flow increases in velocity after the heated section. As air is heated, the density decreases. So the velocity has to increase to maintain the same mass flow rate.
Temperature Profile
Now let's us look at the temperature profile before and after the heating section.
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