Author: John Singleton and Rajesh Bhaskaran, Cornell University Problem Specification |
This page of this tutorial is currently under construction. Please check back soon. |
It is very important that you take the time to check the validity of your solution. This section leads you through some of the steps you can take to validate your solution.
Let's repeat the solution on a finer mesh. For the finer mesh, we will use increase the total number of elements(cells) by a factor of four. In order to accomplish this, we double the number of divisions on each section. In the Workbench Project Page right click on Mesh then click Duplicate as shown below.
https://confluence.cornell.edu/download/attachments/85624049/DupMesh_Full.png |
https://confluence.cornell.edu/download/attachments/141036304/MeshStat1_Full.png |
Close the ANSYS Mesher to go back to the Workbench Project Page. Under FlatPlate (mesh 2), right click on Fluid Flow (FLUENT) and click on Update, as shown below.
Now, wait a few minutes for FLUENT to obtain the solution for the refined mesh. After FLUENT obtains the solution, save your project.
In order to launch FLUENT double click on the Solution of the "Laminar Pipe Flow (mesh 2)" project in the Workbench Project Page. After, FLUENT launches (Click) Plots > XY Plot > SetUp... as shown in the image below.
For this graph, the y axis of the graph will have to be set to the y axis of the pipe (radial direction). To plot the position variable on the y axis of the graph, uncheck Position on X Axis under Options and choose Position on Y Axis instead. To make the position variable the radial distance from the centerline, under Plot Direction, change X to 0
and Y to 1
. To plot the axial velocity on the x axis of the graph, select Velocity... for the first box underneath X Axis Function, and select Axial Velocity for the second box. Next, select outlet, which is located under Surfaces. Then, uncheck the Write to File check box under Options, so the graph will plot. Now, your Solution XY Plot menu should look exactly like the following image.
https://confluence.cornell.edu/download/attachments/85624049/Solu13_Full.png |
https://confluence.cornell.edu/download/attachments/85624049/Plot2L_Full.png |
The plot below shows the results of a further refined mesh ( 20 radial x 100 axial ) and the theoretical results.
https://confluence.cornell.edu/download/attachments/85624049/PlotL_Full.png |