Viscometer for newtonian and non-newtonian fluids

Abstract

A viscometer comprises a plurality of capillary tubes connected in series with a mass flow meter. The capillary tubes are smooth, straight, and unimpeded, and each has a different known, constant diameter. Differential pressure transducers sense differential pressure across measurement lengths of each capillary tube, and the mass flow meter senses fluid mass flow rate and fluid density. A data processor connected to the mass flow meter and the differential pressure transducers computes viscosity parameters of fluid flowing through the viscometer using non-Newtonian fluid models, based on the known, constant diameters and measurement lengths of each capillary tube, the sensed differential pressures across each measurement length, the fluid mass flow rate, and the fluid density.

Description

technical field [0001] The present invention relates to viscosity measurement, and more particularly, to viscometers capable of handling both Newtonian and non-Newtonian fluids. Background technique [0002] Fluid viscosity is a key commonly measured parameter in many industrial processes. A wide range of viscosities is typically used in processes by diverting a small amount of process fluid from the main process fluid path through a viscometer connected in parallel with the main process fluid path. In contrast, some in-line designs allow the viscometer to be located directly in the main fluid path, eliminating the need to tap the process fluid. Most conventional industrial viscometers utilize rotating parts that are in contact with the process fluid, and therefore require bearings and seals to prevent fluid leakage. In applications involving harsh, corrosive or abrasive fluids, this viscometer may require frequent maintenance. [0003] Traditional industrial process visc...

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Problems solved by technology

However, a wide variety of industrial applications deal with slurries, pastes, and plastics, which

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