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Setup and Solution

a.Enter 400 for Number of Iterations.

b.Click Calculate.

7.Save the data file (cav.dat.gz).

File → Write → Data...

18.4.10. Postprocessing

1.Create and plot a definition of pressure contours in the orifice (Figure 18.3: Contours of Static Pressure (p. 653)).

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Results → Graphics → Contours → New...

a.Change Contour Name to contour-static-pressure

b.Enable Filled in the Options group box.

c.Enable Banded in the Coloring group box.

d.Retain the default selection of Pressure... and Static Pressure from the Contours of drop-down lists.

e.Click Save/Display and close the Contours dialog box.

The contour-static-pressure contour definition appears under the Results/Graphics/Contours tree branch. Once you create a plot definition, you can use a right-click menu to display this definition at a later time, for instance, in subsequent simulations with different settings ;or

in combination with other plot definitions.

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Setup and Solution

Figure 18.3: Contours of Static Pressure

Note the dramatic pressure drop at the flow restriction in Figure 18.3: Contours of Static Pressure (p. 653). Low static pressure is the major factor causing cavitation. Additionally, turbulence contributes to cavitation due to the effect of pressure fluctuation (Figure 18.4: Mirrored View of Contours of Static Pressure (p. 654)) and turbulent diffusion (Figure 18.5: Contours of Turbulent Kinetic Energy (p. 654)).

2.Mirror the display across the centerline (Figure 18.4: Mirrored View of Contours of Static Pressure (p. 654)).

View → Display → Views...

Mirroring the display across the centerline gives a more realistic view.

a.Select symm_2 and symm_1 from the Mirror Planes selection list.

b.Click Apply and close the Views dialog box.

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Figure 18.4: Mirrored View of Contours of Static Pressure

3.Create and plot a contour definition of the turbulent kinetic energy (Figure 18.5: Contours of Turbulent Kinetic Energy (p. 654)).

Results → Graphics → Contours → New...

a.Change Contour Name to contour-tke

b.Enable Filled in the Options group box.

c.Enable Banded in the Coloring group box.

d.Select Turbulence... and Turbulent Kinetic Energy(k) from the Contours of drop-down lists.

e.Click Save/Display.

Figure 18.5: Contours of Turbulent Kinetic Energy

	Release 2019 R1 - © ANSYS,Inc.All rights reserved.- Contains proprietary and confidential information
654	of ANSYS, Inc. and its subsidiaries and affiliates.