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https://confluence.cornell.edu/download/attachments/107011456/display_patch.jpg

As can be seen, the Y Velocity is zero everywhere except for the patched region, we have Y Velocity of 0.3 m/s.

Set Convergence Criteria

FLUENT reports a residual for each governing equation being solved. The residual is a measure of how well the current solution satisfies the discrete form of each governing equation. We'll iterate the solution until the residual for each equation falls below 1e-3.

Main Menu > Solve > Monitors > Residual...
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Default value for Convergence Criterion for continuity, x-velocity, and y-velocity is 1e-3.

Also, under Options, select Plot and Print. This will plot the residuals in the graphics window as they are calculated.

Click OK.

Monitor also the lift coefficient on the cylinder.

Main Menu > Solve > Monitors > Force...
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Under Coefficient, select Lift. Select cylinder under Wall Zones. Under Options, select Plot and Write. Note that Plot Window is 1. Click Apply. 

Set Reference Values

The reference values are used to non-dimensionalize the forces and moments action on the wall surface.

Main Menu > Reference Values...
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Select  ff1 from the Compute From drop-down list. FLUENT will update the reference values based on the boundary conditions at ff1. Click OK.

Set Monitor

 
Go to Step 6: Analyze Results

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