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  • Supersonic Flow Over a Wedge - Numerical Results
  • Created by user-6c822, last modified by user-f1580 on Feb 25, 2015

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Author: Rajesh Bhaskaran, Cornell University

Problem Specification
1. Pre-Analysis & Start-Up
2. Geometry
3. Mesh
4. Physics Setup
5. Numerical Solution
6. Numerical Results
7. Verification & Validation
Exercises
Comments

Numerical Results

 

This page goes through the post-processing steps for the Supersonic Flow Over a Wedge in the CFD Post post-processor included with ANSYS Workbench. For instructions on performing the post-processing using the classic FLUENT post-processor, see this page.

Mach Number Contours

The following video shows how to make a plot of the Mach number contours using CFD Post. If the videos below don't appear in your browser, try reloading the webpage

 

To properly send the additional quantities to CFD post, you need to do the following steps in the right order. First initialize your solution, then select the additional quantities as shown in the above video and finally, run the calculation.

Summary of the above video:

  1. Some calculated parameters are not by default carried over into CFD-post. We are interested in such quantities (i.e. Mach Number). To manually transfer a customized selection of quantities
    1. Select File > Data File Quantities
    2. Under Additional Quantities, Select Static Pressure, Total Pressure, Mach Number, and Total Temperature
    3. Click OK.
  2. Post-processing will be done in CFD-post
    1. Go to Project Schematic in Workbench.
    2. Double click on Results.
  3. We are interested in viewing contours of Mach Number in CFD-post
    1. Select Insert > Contour.
    2. Type “Mach no” under Name in the Insert Contour dialogue box that appears.
    3. Click Ok.
    4. Under Details of Mach no, select Locations > symmetry 1.  
    5. Under Details of Mach no, select Variable > Mach Number.
    6. Click Apply.
  4. Click on the Z Axis to view the XY Plane
  5. To zoom out, click on the Fit View icon in the toolbar
  6. To increase the number of contours to 101
    1. In the Outline tree, double click on Mach no.
    2. Under Details of Mach no, scroll down to # of Contours. Type “101”.
    3. Click Apply.
  7. To turn on the mesh in the graphics pane
    1. Check the box next to symmetry 1 in the Outline tree.
    2. If the mesh still does not show, right click anywhere on the flow domain in the graphic pane. Click Render > Show Mesh Lines.
  8. We are interested in refining the mesh close to the shock. To zoom in on the mesh
    1. Right click and hold the right mouse button in the fluid domain in the graphics pane.
    2. Move the cursor to create a rectangular window to which you want to zoom.
  9. Click on Fit View 
  10. Turn off the mesh by deselecting symmetry 1 in the outline tree
  11. To save a copy of the figure in the graphics pane
    1. Select the camera icon in the toolbar.
    2. Browse to the desired folder in which you wish to save the image.
    3. Click Save.  

Pressure Contours

The following video shows how to make a plot of the pressure contours.

 

Summary of the above video:

  1. Turn off the Mach Number contours in the graphics window
    1. Uncheck the box next to Mach no in the Outline tree.
  2. We are interested in viewing contours of pressure in CFD-post
    1. Select Insert > Contour
    2. Type “Pressure contours” under Name in the Insert Contour dialogue box that appears.
    3. Click OK.
    4. Under Details of Pressure contours, select Locations > symmetry 1.  
    5. Under Details of Pressure contours, select Variable > Pressure.
    6. Click Apply.
  3. To increase the number of contours to 101
    1. Under Details of Pressure contours, scroll down to # of Contours. Type “101”.
    2. Click Apply. 

Velocity Vectors

To plot the velocity vectors, follow the steps in the video below.

 

Plot Mach Number Variation Along y=0.4 m

First, we'll create a line at y=0.4m. Then, we'll plot the Mach number variation along this line using the "Chart" facility in CFD Post. These steps are shown in the video below.

 


Go to Step 7: Verification & Validation

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