Abstract
Fully developed flow is well defined for most values of Reynoldsnumber but distorted flow is not. Velocity profile is the definition given tothe distribution of velocity in the axial direction over the cross-section ofthe pipe. This distribution is not usually uniform and can vary dramaticallydepending on the properties of the fluid and the configuration of the pipe inwhich it flows. Ultrasonic flowmeters are affected by such distortions in theflow profile, often resulting in erroneous measurements. Transit-timeultrasonic flowmeters are widely used in industry in distorted fluid flows,therefore correction to or prediction of distorted profiles has sparked greatinterest in the design and application of ultrasonic flowmeters. This documentdescribes a method for modelling and analysing the effect of theoreticalasymmetric flow profiles on ultrasonic flowmeters of the transit-time type,thus allowing an understanding of installation effects.
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