<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Due to the viscous shear stress, there is an obvious error between the real flow rate and the rotameter indication for measuring viscous fluid medium. At 50 cSt the maximum error of DN40 orifice rotameter is up to 35 %. The fluid viscosity effects on the orifice rotameter are investigated using experimental and theoretical models. Wall jet and concentric annulus laminar theories were adapted to study the influence of viscosity. And a new formula is obtained for calculating the flow rate of viscous fluid. The experimental data were analyzed and compared with the calculated results. At high viscosity the maximum theoretical results error is 6.3 %, indicating that the proposed measurement model has very good applicability.</p></abstract>

Due to the viscous shear stress, there is an obvious error between the real flow rate and the rotameter indication for measuring viscous fluid medium. At 50 cSt the maximum error of DN40 orifice rotameter is up to 35 %. The fluid viscosity effects on the orifice rotameter are investigated using experimental and theoretical models. Wall jet and concentric annulus laminar theories were adapted to study the influence of viscosity. And a new formula is obtained for calculating the flow rate of viscous fluid. The experimental data were analyzed and compared with the calculated results. At high viscosity the maximum theoretical results error is 6.3 %, indicating that the proposed measurement model has very good applicability.

The Effects of Fluid Viscosity on the Orifice Rotameter

School of Electrical Engineering & Automation, Tianjin University, Tianjin, 300072, China Tianjin Key Laboratory of Process Measurement and Control, Tianjin, 300072, China

Flow Measurement Center of Aviation Industries of China,Xinxiang,453049,China

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"The Effects of Fluid Viscosity on the Orifice Rotameter"}

Due to the viscous shear stress, there is an obvious error between the real flow rate and the rotameter indication for measuring viscous fluid medium. At 50...

The Effects of Fluid Viscosity on the Orifice Rotameter

Published Online: May 06, 2016

Page range: 87 - 95

Received: Nov 11, 2015

Accepted: Apr 05, 2016

DOI: https://doi.org/10.1515/msr-2016-0012

Keywords
Rotameter, viscosity, experiment, regional model, flow measure

© by Ying Xu

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The Effects of Fluid Viscosity on the Orifice Rotameter

Published Online: May 06, 2016

Page range: 87 - 95

Received: Nov 11, 2015

Accepted: Apr 05, 2016

DOI: https://doi.org/10.1515/msr-2016-0012

KeywordsRotameter, viscosity, experiment, regional model, flow measure

© by Ying Xu

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Rotameter, viscosity, experiment, regional model, flow measure