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A complete performance curve for a valve contains valve coefficients from fully closed to a fully open condition. Autonomous Valve CFD app provides the users the choice between 1 to 18 opening conditions for their CFD simulations. The accuracy of the performance curve depends on the number of opening conditions considered for performance evaluation. This becomes of greater importance when we consider certain valves who have peak performance values at intermediate openings instead of the max opening condition. This is usually seen in the case of the Coefficient of Hydrodynamic Torque values for butterfly valves and Cv values for offset butterfly valves. So, the selection of intermediate opening conditions plays a vital role in understanding the true nature of a performance curve.
In the previous version of the app, the users were bound to operate only with inputs like initial opening, final opening, and the equally divided openings between the two. For example, for a simulation with opening angles starting from 20 deg and ending at 90 degrees, it was possible to get equally divided sub-openings such as 30, 40, 50, 60, 70, 80. But it was not possible to add additional non-uniform intermediate openings such as 85 degrees. The users had to run a separate simulation or use a smaller step value to include 85 degrees to generate Cv values at these openings. This issue has been addressed and resolved in the updated feature.
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