Influence Of Liquid Viscosity On Flowmeter

The viscosity of various liquids varies greatly and varies significantly due to temperature changes. Viscosity on all kinds of flowmeter influence degree is not the same, for example, for electromagnetic flowmeter, ultrasonic flowmeter and Coriolis mass flowmeter flow value is in a very wide viscosity range, can be considered not affected by the liquid viscosity; The error characteristic of volumetric flowmeter is related to viscosity and may be slightly affected. Float flowmeters, turbine flowmeters, and vortex flowmeters, when the viscosity exceeds a certain value, the impact is too great to use.

Some flowmeters are characterized by the pipe Reynolds number, which is a function of fluid viscosity, density, and pipe velocity, as a parameter. Therefore, viscosity has an effect on meter characteristics. General volumetric flowmeter viscosity increases, the scope of the expansion, and turbine flowmeter and vortex flowmeter on the contrary, viscosity increases, the scope of the reduction. Therefore, the temperature-viscosity characteristics of the liquid should be known when evaluating the adaptability of the flowmeter.