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  • FLUENT - Steady Flow Past a Cylinder - Step 2

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Author: Rajesh Bhaskaran & 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. Verify ResultsRefine Mesh
Problem 1
Problem 2

Step 2: Mesh Geometry in GAMBIT

Mesh

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Edges

We will Before we mesh each of the 2 faces separately to get our final mesh. Before we mesh a face, we need to define the point of distribution for each of the edges that form the face.We will use the default setting for meshing of the edge.faces, we should mesh the edges so that we can better define the mesh.

Following figure shows the edges with different mesh properties.

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Higher Resolution Image
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https://confluence.cornell.edu/download/attachments/103729331/step2_img001.jpg?version=3

Label

Edge Mesh Properties

A

Interval Count: 36, Double First Length: 0.5

B

Interval Count: 36, Double First Length: 0.2

C

Interval Count: 30, First Length: 0.1

D

Interval Count: 18

E

Interval Count: 90, First Length: 0.1

F

Interval Count: 36

G

Interval Count: 72

H

Interval Count: 30

I

Interval Count: 36, Double First Length: 0.05


Operation Toolpad > Mesh Command Button Image Modified > Edge Command Button **Button  Image Modified *> Mesh Edges* Image Modified

Select the edge AB. The edge will change color and an arrow will appear on the edge. This indicates that you are ready to mesh this edge. Select interval size under Spacing. Enter 0.04 for interval size.

Next we will mesh the edge BC. Select the edge BC and enter 0.04 for interval size.

Do the same for edge CD and CF.

Mesh edge 'A' through 'I' according to the properties shown on the table.

After we have all the edge meshes, we can mesh the facesNow that the appropriate edge meshes have been specified, mesh the face face1:

Operation Toolpad > Mesh Command Button Image Modified > Face Command Button Image Modified > Mesh Faces Image Modified

Select the face1. The face will change colorface one by one. You can use the defaults of Quad (i.e. quadrilaterals) and Map. Click Apply.

The meshed face should look as follows:

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(Click picture for larger image)

Next mesh face face2 in a similar fashion.

The resultant mesh should look as follows:

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 (Click picture for larger image)

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newwindow
Higher Resolution Image
Higher Resolution Image
https://confluence.cornell.edu/download/attachments/103729331/step2_img002.jpg?version=1

Go to Step 3: Specify Boundary Types in GAMBIT

See and rate the complete Learning Module

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