A Study on the Flow-Coefficient of Area-Type Flowmeter

The Flow-Coefficient of Area-Type Flowmeter

Abstract

Characteristics of the area-type flowmeter have so far been investigated by many workers. However, our knowledge is at present far from complete owing to the difficult nature of the fluid flow involved. One of the problems yet to be studied may be the effect of the Reynolds number (combined effect of viscosity, density and speed of the flow) on the flow-rate coefficient of this type flowmeter. In the present paper is disscussed the structure of the internal flow at very low and very high Reynolds numbers, and theoretical formulae for the flow-rate are derived for respective cases. Two formulae are then combined into one which may cover the whole range of the Reynolds number. This composite formula is favourably compared with experimental data obtained previously by the present author.