FLUENT - Steady Flow Past a Cylinder - Step 6

Step 6: Analyze Results

Plot Velocity Vectors

Let's plot the velocity vectors obtained from the FLUENT solution.

Display > Vectors

Set the Scale to 14 and Skip to 4. Click Display.

From this figure, we see that there is a region of low velocity and recirculation at the back of cylinder.

Plot Pressure Coefficient Contours

Let's take a look at the Pressure Coefficient variation around the cylinder.

Display > Contours

Under Contours of, choose Pressure.. and Pressure Coefficient. Select the Filled option. Increase the number of contour levels plotted: set Levels to 100.

Click Display.

Because the cylinder is cylindrical, we see that the pressure coefficient profile is symmetry between the top and bottom of cylinder.

Plot Stream Function

Let's take a look at the Pressure Coefficient variation around the cylinder.

Display > Contours

Under Contours of, choose Pressure.. and Pressure Coefficient. Select the Filled option. Increase the number of contour levels plotted: set Levels to 100.

Click Display.

Because the cylinder is cylindrical, we see that the pressure coefficient profile is symmetry between the top and bottom of cylinder

Let's set the reference values necessary to calculate the pressure coefficient.

Report > Reference Values

Select farfield under Compute From.

The above reference values of density, velocity and pressure will be used to calculate the pressure coefficient from the pressure. Click OK.

Display > Contours...

Select Pressure... and Static Pressure from under Contours Of. Then select Pressure Coeffient.

(Click picture for larger image)

The pressure coefficient after the shockwave is 0.293, very close to the theoretical value of 0.289. The pressure increases after the shockwave as we would expect.

Go to Step 7: Verify Results

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