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Title: Viscous Flow Measurement Using Quadrant-Edged Orifice Plates
Author: Stephen T. Stark
Source: 1988 International School of Hydrocarbon Measurement
Year Published: 1988
Abstract: Quadrant-edged orifice plates have been recognized for over fifty years for their excellent performance when used to measure viscous fluids flowing at very low Reynolds numbers. Sharp-edged orifice plates, by comparison, are known to perform reliably when used at higher Reynolds numbers but do not perform as well at lower Reynolds numbers. This paper presents some of the more recently developed test data on quadrant-edged orifice plates and compares these results to the characteristics of sharp-edged orifice plates under similar flowing conditions. In addition, the previously predicted performance of quadrant-edged orifice plates is compared to the new data.

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