Computational Fluid Dynamics Analysis of Butterfly Valve Performance Factors

Appendix E-Computational Fluid Dynamic Flows Visualizations

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This appendix provides visualizations of the flow field for the absolute pressure and the velocity vectors for every valve opening angle simulated, presented along two planes intersecting the flow domain: one perpendicular to the angle of rotation, and another parallel to the angle of rotation for the butterfly valve, referred henceforth as the top and side views, respectively.

These visualizations are shown in Figs. E.1 – E.72. Detailed views of the region surrounding the valve are also provided in the mentioned figures, in order to allow greater clarity regarding the characteristics of the flow.

Fig. E.1: Top view of absolute pressure across the entire flow domain for the 10 degree open
case.
Fig. E.2: Detailed top view of absolute pressure across the butterfly valve for the 10 degree
open case.
Fig. E.3: Side view of absolute pressure across the entire flow domain for the 10 degree
open case.
Fig. E.4: Detailed side view of absolute pressure across the butterfly valve for the 10 degree
open case.
Fig. E.5: Top view of velocity vectors across the entire flow domain for the 10 degree open
case.
Fig. E.6: Detailed top view of velocity vectors across the butterfly valve for the 10 degree
open case.
Fig. E.7: Side view of velocity vectors across the entire flow domain for the 10 degree open
case.
Fig. E.8: Detailed side view of velocity vectors across the butterfly valve for the 10 degree
open case.
Fig. E.9: Top view of absolute pressure across the entire flow domain for the 20 degree open
case.
Fig. E.10: Detailed top view of absolute pressure across the butterfly valve for the 20 degree
open case.
Fig. E.11: Side view of absolute pressure across the entire flow domain for the 20 degree
open case.
Fig. E.12: Detailed side view of absolute pressure across the butterfly valve for the 20 degree
open case.
Fig. E.13: Top view of velocity vectors across the entire flow domain for the 20 degree open
case.
Fig. E.14: Detailed top view of velocity vectors across the butterfly valve for the 20 degree
open case.
Fig. E.15: Side view of velocity vectors across the entire flow domain for the 20 degree open
case.
Fig. E.16: Detailed side view of velocity vectors across the butterfly valve for the 20 degree
open case.
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