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Plots

This section shows some of the common plots used in the Ball 3D valve simulation. The steps to create the plots are:

1. Click Load Results in the Simulation Panel.
2. Select the result file ball3Dvalve_model_1000.sres in the ensuing Load Results dialog box, click Open.

Mass Flux

The mass balance is monitored with the mass flux plots.

1. Select inlet_inlet and outlet_outlet under Boundaries in the Geometric Entities Panel.
2. Click Add XY-Plot icon in the Toolbar.
3. Click Click for Variable List icon, select Mass Flux from the Flow list in the Plot Panel.
4. Select Plot Selected Variables icon > click Plot Property icon.
5. In the Plot Property dialog box, specify 0.2 kg/s for Maximum and -0.2 kg/s for Minimum under Display Default Range. Click OK.
6. Click Combine Entity Data into a Single Curve to obtain the net mass flux.

Note: The moving average is used in transient simulations to obtain the average values of a variable in a sampling interval, over the entire simulation time.To plot the moving average, click Click for Variable List icon in Plot Property dialog box and enable Moving Average. The value for the Moving Average input is the number of preceding time steps (sampling interval) for calculating the average.

Valve Displacement

To plot the angular displacement of the valve in three directions.

1. Click Add XY-Plot icon in the Toolbar.
2. Select Translation (1 DOF) Ball_main in the Model Panel.
3. Click Click for Variable List icon in the Plot Panel, select Displacement from the Translation (1 DOF) Ball_main list.
4. Click Plot Selected Variables icon.

5. Similarly, plot the displacement in second and third directions by selecting Translation (1 DOF) Ball_second and Translation (1 DOF) Ball_third respectively in the Model Panel.

6. Click Plot Property icon. In the Plot Property dialog box, specify 0.0005 m for Maximum and -0.0002 m for Minimum under Display Default Range. Click OK.

Figure 6.666 - Valve Displacement plot

´	Note: The oscillation of the ball valve in the second direction is due to the initial displacement of 0.0001 m provided in that direction.

Pressure

The pressure is plotted at the monitoring points as follows:

1. Select highpressure_point and lowpressure_point under Points in the Geometric Entities Panel.
2. Click Add XY-Plot icon in the Toolbar.
3. Click Click for Variable List icon in the Plot Panel, select Pressure from the Flow list.
4. Click Plot Selected Variables icon.
5. Click Plot Property icon. In the Plot Property dialog box, specify 2.1e+6 Pa for Maximum and 1.68e+6 Pa for Minimum under Display Default Range. Click OK.

Figure 6.667 - Pressure at monitoring point

Forces

The net force acting on the Ball 3D valve in all three directions are plotted as follows:

1. Click Add XY-Plot icon in the Toolbar.
2. Select Translation (1 DOF) Ball_main in the Model Panel.
3. Click Click for Variable List icon in the Plot Panel.
4. Select Net Force and click Plot Selected Variables icon.
5. Similarly plot Net Force in the second and third directions by selecting Translation (1 DOF) Ball_second and Translation (1 DOF) Ball_third respectively in the Model Panel.
6. Click Plot Property icon. In the Plot Property dialog box, specify 1 N for Maximum and -0.8 N for Minimum under Display Default Range. Click OK.

Figure 6.668 - Forces on the valve

Main Displacement

To plot the main direction displacement of the valve in three directions.

1. Click Add XY-Plot icon in the Toolbar.
2. Select Ball3D Valve in the Model Panel.
3. Click Click for Variable List icon in the Plot Panel, select Main Direction Displacement from the Ball 3D Valve list.
4. Click Plot Selected Variables icon.
5. Click Plot Property icon. In the Plot Property dialog box, specify 0.0005 m for Maximum and 0 m for Minimum under Display Default Range. Click OK.

Figure 6.669 - Main Displacement plot

Offset Radius

To plot the offset radius of the valve in three directions.

1. Click Add XY-Plot icon in the Toolbar.
2. Select Ball3D Valve in the Model Panel.
3. Click Click for Variable List icon in the Plot Panel, select Offset Radius from the Ball 3D Valve list.
4. Click Plot Selected Variables icon.

Figure 6.670 - Offset Radius plot