MENG 421 Assignment 11

Laminar Flow

MENG 421 -- Class assignments -- 1 2 3 4 5 6 8 9 10 11 12

Follow the directions for the Ansys 5.7 tutorial Laminar and Turbulent Flow up through Step 18: Make a path plot of velocity through the outlet. That is, only complete the laminar flow portion. You will complete the remainder, turbulent flow, during the next laboratory. If you make the web page for the tutorial very narrow and move it to the right side of the screen, there will be room for Ansys on the other side of the screen. Then you can follow the directions as you do the work.
Be sure to save your work as you learned in Lab 9 so you can recover from an error and so you can continue next week with Lab 12. At each major step, go to the Temp directory and copy both file.log and Flow141.db. Rename them e.g., FlowMesh.log and Flow141Mesh.db.

Point a copy of Explorer to C:\WINDOWS\Temp and clear all files. Make frequent copies of the Ansys file named file.log because this is where Ansys keeps a copy of all the keyboard commands you type. Then you can easily rerun your work from the resulting batch file.
Start Ansys
Utility Menu: File | Change Jobname | Flow141 | OK
Utility Menu: File | Change Title | (Put the usual here -- Laminar Flow, your name, and the date) | OK
Make the background black by typing the Ansys command
```
/color,pbak,off
```
Then click the Plot menu and pick Replot.
Now continue at Set preferences in the tutorial
Make a screen capture of the meshed duct that includes your name and date.
Make a screen capture of the velocity vectors
Make a screen capture of the pressures
Make copy of file.log that has all your typed commands, name it Flow141.a, and print it.
Save your work in binary for next time. It will take about 900 KB of space.
Utility Menu: File | Save as | Plate82.db |
Be sure to save your file on the Ansys directory of Drive U. Otherwise, your work is saved on the local PC you are currently working on OK
Assignment
Create a cover sheet describing what you did. Include three graphics:
- the meshed duct
- the velocity vectors
- the pressures
and your list of commands from the log file. If not printing in color, change to negative and gray scale. Do not combine with Lesson 12. Turn in the package as specified at the lab.