Apparatus for measuring the flow rate and/or viscous characteris

Details Apparatus for measuring the flow rate and/or viscous characteris Apparatus for measuring the flow rate and/or viscous characteris

1975-02-06

1976-04-27

Goldstein, Herbert

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

73205R, 73212, G01F 146, G01F 148, G01N 1108

Patent

active

039525775

ABSTRACT:
An apparatus for measuring the flow rate and/or viscous characteristics of a fluid comprising a casing having a fluid passage, a fluid inlet cavity and a fluid outlet cavity, fluid pressure detecting means preferably at spaced positions along the passage, and fluid pressure indicating means for indicating the or each characteristic to be measured in terms of the fluid pressure differential between the detecting means positions. The fluid inlet cavity provides a substantially unobstructed flow path to the fluid passage and the fluid outlet cavity provides a substantially unobstructed flow path therefrom. The fluid passage cross-sectional area decreases in the fluid flow direction in order to maintain laminar flow of the fluid therealong and wall boundary induced viscous shear therealong, over an extended range of Reynolds number within the fluid passage and formulae are given, using substantially pure water as a standard fluid, from which the limits of fluid passage geometry can be defined. In one embodiment the fluid passage is annular in shape and the fluid flow radially inward. The fluid passage may be divided into a plurality of substantially identical fluid passages to increase the flow rate capacity of the apparatus.

REFERENCES:
patent: 1586948 (1926-06-01), Connet
patent: 1963011 (1934-06-01), Albersheim et al.
patent: 2503676 (1950-04-01), Marusov
patent: 2700891 (1955-02-01), Shafer
patent: 3677069 (1972-07-01), Rubin et al.

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