July 11th, 2018
Validation cases are the best way to evaluate how a numerical simulation compares to a physical problem that has been measured experimentally. In this blog post, we will review two important performance parameters for incompressible flow through an industrial scale butterfly valve; the flow coefficient (Cv) and the torque coefficient (CT).
A 3D hexahedral SnappyHexMesh was used and refinement was done in three places: upstream, downstream, and in the vicinity of the valve. A layer mesh was used on all wall regions for more accuracy.
Tool Type: OpenFOAM
Analysis Type: Incompressible Steady State
Turbulence Model: k–omega SST
Fluid: Water (ν =10-6 m2/s)
A comparison of the flow coefficient (Cv) and the torque coefficient (CT) over the opening angle ranging from 20 to 85 degrees can be seen in the plots below.
From these plots, it can be seen that the performance parameter values from the numerical analysis performed on the SimScale platform match well with the experimental values from the team of Xue Guan Song .
To avoid large data, the import project only contains results for angles 20, 50 and 85 degrees.
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