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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. Change the domain size.
8. Unsteady Flow.
Problem Set.
Citations.

Analyze Results

Drag / Lift coefficients

Report > Forces >

Under Force Vector, we set X = 1 and Y = 0 to identify the direction of drag force. Click Print to see what's displayed in the main window.

Plot convergence of the drag coefficient versus the number of iterations. Report the drag coefficient and compare it with the result in literature as shown in Table 1.

Plot>File

Click Add... choose the file with drag or lift coefficient.

Before you plot, you can adjust the Axes and Curves to get a better view.

Anchor
citation2-5
citation2-5

Similarly, you can plot the lift coefficient, which should be zero for the symmetric flow. As you can see, the drag coefficient is around 2.1, which is significantly higher than the result in the table. Next, we will try to increase the domain size and repeat the simulation.

Re

40

300

1000

Mittal 2

1.53

1.36

1.45

Henderson 3

1.54

1.37

1.51

Marella et al 4

1.52

1.28

-

Mittal&Balachandar 5

-

1.37

-

Table 1 Mean drag coefficient in literature for the flow past a 2D cylinder.

Go to Step 7: Change the domain size.

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