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Title: VISCOSITY AND ITS APPLICATION IN LIQUID HYDROCARBON MEASUREMENT
Author: Terrence Cousins Dr. Richard Steven
Source: 2018 International School of Hydrocarbon Measurement
Year Published: 2018
Abstract: The effect of viscosity takes a variety of forms in its relationship to flow measurement. As a general rule low viscosity has less effect on the performance of flowmeters, although this is not totally true, for example, with positive displacement meters. For most meters, as viscosity increases it has greater effects on meter performance, both in the operation and in the effect of the fluid passing through the meter. So, for example, as the viscosity of the fluid increases the chances of the fluid in the pipe being in a transition region, or going into laminar gets greater. This can lead to measurement issues due to the variations in flow profile and turbulent noise affecting the meter performance. This paper discusses the phenomenon of viscosity, how it is measured, the effect on the flow in pipes, and the concept of Reynolds number. The paper then goes on goes on to look in some detail at the effect the viscosity on different types of flowmeters, in particular turbine, positive displacement, ultrasonic and Coriolis meters.

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