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Title: Modelling And Evaluation Of Velocity Profile Effects On Coriolis Flowmeters
Author: Joe Kutin, Gregor Bobovnik, Ivan Bajsic
Source: Flomeko 2005
Year Published: 2005
Abstract: The aim of this paper is to discuss velocity profile effects in Coriolis flowmeters. The newgeneration devices try to achieve accuracies better then 0.1 %, and this has to be considered when evaluating the significance of particular influences on their characteristics. Although the velocity profile effect is generally not considered as problematic as, for instance, some dynamic effects (flow pulsations, mechanical vibrations, two-phase flows, etc.), some accessible experimental studies give an indication of its magnitude. For example, three commercial Coriolis flowmeters showed no or in one case just detectable measurement errors under disturbed flow conditions in 1 (a relatively high threshold of 0.25 % was used for reporting a significant effect), but the output of a commercial shell-type Coriolis flowmeter was affected by up to a few percent in 2 (testing with pressurized gas).

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