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Click here for the FLUENT 6.3.26 version. |
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Repeat the process for the two other locations needed:
HTML Table |
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Name | Point 1 | Point 2 |
"Pipe Centerline" | (0,0,0) | (8,0,0) |
"Pipe Outlet" | (8,0,0) | (8,0.1,0) |
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Data Series Tab
Rename the data series to "Y plus". Next, change Location to Pipe Wall.
X Axis Tab
Change Variable to X.
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Export the data to a .csv file ("comma separated values") by clicking on Export. This file can be opened in Excel.
Centerline Velocity
Next, we would like to make a graph of the axial velocity along the centerline. We will do this by creating another chart.
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To create a nondimensional version of the velocity profile, we first create a variable for r/D as shown in the the following video.
HTML |
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<iframe width="600" height="338" src="//www.youtube.com/embed/aPYB_YZXeYs" frameborder="0" allowfullscreen></iframe> |
Summary of the above video:
- In the right preview window, select Chart Viewer (Outlet Velocity selected in the tree)
- Go to Expressions tab in the same row as Outline
- Right click Expressions > New
- Name "r nondim exp"
- For Definition
- Right click > Variables > Y
- Insert /0.2[m] after Y
- Apply
- Go to Variables tab next to Outline
- Right click on Derived > New
- Name it r nondim
- For Expression, select "r nondim exp"
Then we make a plot of r/D vs. u/U using the steps shown below.
HTML |
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<iframe width="600" height="450" src="//www.youtube.com/embed/QkAfGyxeXlo" frameborder="0" allowfullscreen></iframe> |
Summary of the above video:
- Go to Outline tab
- Highlight Outlet Velocity Chart > Right click > Duplicate
- Name it Outlet Velocity nondim
- Go to Chart Viewer in the right preview
- Double click on Outlet Velocity nondim to ensure you are editing this new version
- Click on the Y Axis
- Select Variable r nondim
- Apply
The axis labels and legend can be modified as shown below.
HTML |
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<iframe width="600" height="338" src="//www.youtube.com/embed/Nk3sXL_bSBo" frameborder="0" allowfullscreen></iframe> |
Summary of the above video:
- In the General Table
- For Title, enter Nondimensional Velocity Profile
- Apply
- In the X Axis
- Scroll down and uncheck Use data for axis labels
- Enter in Custom Label u/U
- In the Y Axis
- Scroll down and uncheck Use data for axis labels
- Enter in Custom Label r/D
- In the Line Display
- Double click on Series 1 (Pipe Outlet)
- Uncheck Use series name for legend name
- Rename to Re = 10,000
We add the corresponding laminar profile. The necessary csv file can be downloaded here.
HTML |
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<iframe width="600" height="450" src="//www.youtube.com/embed/y2GsRs2Pfio" frameborder="0" allowfullscreen></iframe> |
Summary of the above video:
- Make sure you are editing Outlet Velocity nondim by double clicking on it
- Go to Data Series tab
- In the white space, right click > New
- Click File
- Select csv file downloaded from webpage
- Apply
- Go to Line Display
- Double click on the second curve
- Uncheck Use series name for legend name
- Name the Legend Name Laminar
- To save a copy of the chart, click on Save Picture icon in top toolbar
Non-dimensional Turbulent Viscosity Profile
HTML |
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<iframe width="600" height="450" src="//www.youtube.com/embed/OEX1A8Q2tDw" frameborder="0" allowfullscreen></iframe> |
Summary of the above video:
- Start FLUENT
- Go to File > Data File Quatntities
- Make sure Turbulent Velocity is selected, press OK
- Go back to FLUENT, click on Run Calculation
- Enter 1 in Number of Iterations
- Calculate
- Go back to Project Schematic
- Right click on Results > Refresh
- Go to CFD Post
- Click on Expressions tab
- Right click on Expressions > New
- Name it mut nondim exp
- In Definition white space:
- Right click > Variables > Eddy Viscosity
- Insert + 2e-5[kg/m/s]
- Divide whole thing by molecular viscosity 2e-5[kg/m/s]
- Apply
- Go to Variables tab
- Right click Derived > New
- Name it mut nondim
- Click Expression > select mut nondim exp
- Go to Outline > click on Chart icon in top toolbar
- Name it mut nondim plot
- Click on Data series
- Location Pipe Outlet
- Click on X Axis
- Variable mut nondim
- Click on Y Axis
- Variable r nondim
- Apply
Go to Step 7: Verification & Validation
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