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  • FLUENT - Steady Flow Past a Cylinder - Step 7

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Author: Rajesh Bhaskaran and Yong Sheng Khoo, Cornell University

Problem Specification
1. Create Geometry in GAMBIT
2. Mesh Geometry in GAMBIT
3. Specify Boundary Types in GAMBIT
4. Set Up Problem in FLUENT
5. Solve!
6. Analyze Results
7. Refine Mesh
Problem 1
Problem 2

Step 7: Refine Mesh

...

Follow Step 1 through Step 5. At step 2, use the following edge mesh properties instead.

newwindow
Higher Resolution Image
Higher Resolution Image
https://confluence.cornell.edu/download/attachments/104400914/step2_img001.jpg?version=1

Label

Medium Mesh (Original)

Coarse Mesh

Fine Mesh

A

Interval Count: 36, Double First Length: 0.5

Interval Count: 24, Double First Length: 0.7

Interval Count: 54, Double First Length: 0.3

B

Interval Count: 36, Double First Length: 0.2

Interval Count: 24, Double First Length: 0.3

Interval Count: 54, Double First Length: 0.12

C

Interval Count: 30, First Length: 0.1

Interval Count: 20, First Length: 0.2

Interval Count: 45, First Length: 0.09

D

Interval Count: 18

Interval Count: 12

Interval Count: 27

E

Interval Count: 90, First Length: 0.1

Interval Count: 60, First Length: 0.15

Interval Count: 135, First Length: 0.07

F

Interval Count: 36

Interval Count: 24 

Interval Count: 54

G

Interval Count: 72

Interval Count: 48

Interval Count: 108

H

Interval Count: 30

Interval Count: 20

Interval Count: 45

I

Interval Count: 36, Double First Length: 0.05

Interval Count: 24, Double First Length: 0.07

Interval Count: 54, Double First Length: 0.03

...

Plot > XY Plot...

Change the Y Axis Function to Pressure..., followed by Pressure Coefficient. Then, select cylinder under Surfaces. Check the option Write to File.

Click Write...
 
Enter the file name and directory to save.
 
Do the same for medium and fine meshes by opening different case and data files.
 
After that, open the files that you have written with excel spreadsheet. Compile and plot the data accordingly.
 

newwindow
Higher Resolution Image
Higher Resolution Image
https://confluence.cornell.edu/download/attachments/104400914/step6_Cpcompare2.jpg?version=1
 

Info
title

A quick and dirty way plotting three different mesh is to use FLUENT directly. Plot > XY Plot... You can Load File... that you have saved previously. However, using this way, you have less control of how you can present the data and is not recommended for report presentation.

 
 

Go to Problem 1

See and rate the complete Learning Module

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