Prediction of the Effect of Liquid Viscosity on Interfacial Shear Stress and Pressure Drop in Vertical Upward Gas-Liquid Annular Flow

Autor:	Tohru Furukawa, Tohru Fukano
Rok vydání:	1996
Předmět:	Pressure drop Materials science Mechanical Engineering Liquid viscosity Annular flow Mechanics Condensed Matter Physics law.invention Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Stress (mechanics) Interfacial shear Pressure measurement law Constant current Pressure gradient
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 62:4032-4039
ISSN:	1884-8346 0387-5016
Popis:	The purpose of the present study is to investigate the effects of liquid viscosity on the mean liquid film thicknesses, wave heights, and gas-liquid interfacial shear stresses in vertical-upward cocurrent annular flow in a 26.0mm-inner-diameter-tube. Water and glycerol solution were used as working fluids in order to change the kinematic viscosity of liquid from 0.85×10-6 to 8.6×10-6m2/s. The mean liquid film thicknesses and wave heights were determined using the signals of time-varying cross-sectionally averaged holdup which were detected by a constant current method at a distance of about 3.5m from an air-liquid mixer. The pressure gradients were also measured by a U-tube manometer. As a result we proposed correlations for the mean liquid film thicknesses and for the interfacial friction factors. In addition a method for estimating pressure drop was proposed, which verified that the calculated values were in good agreement with the measured values.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::edddbbe47ba3dffb9c73a7d285d96aa7 https://doi.org/10.1299/kikaib.62.4032 Zobrazit plný text záznamu