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Numerical prediction of fully developed turbulent swirling flows in an axially rotating pipe by means of a modified k turbulence model

Numerical prediction of fully developed turbulent swirling flows in an axially rotating pipe by... A numerical study is performed to investigate turbulent flowcharacteristics in a pipe rotating around the axis. Emphasis is placed on theeffect of pipe rotation on the friction coefficient and velocity distributionin the hydrodynamically, fullydeveloped flow region. Thek turbulence model is modified by taking the swirling effect intoaccount, in which the model function including the Richardson number isintroduced to the equation. The governing boundarylayerequations are discretized by means of a control volumefinitedifference technique for numerical computation.Results obtained from the modified model agree well with experiment data inthe existing literature. It is found from the study that i anaxial rotation of the pipe induces an attenuation in the turbulent kineticenergy, resulting in a reduction in the friction coefficient, the turbulentand ii an increase in the velocity ratio causes substantialdecreases in the friction coefficient, the turbulent kinetic energy and thestreamwise velocity gradient near the wall. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Numerical Methods for Heat and Fluid Flow Emerald Publishing

Numerical prediction of fully developed turbulent swirling flows in an axially rotating pipe by means of a modified k turbulence model

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References (16)

Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0961-5539
DOI
10.1108/EUM0000000004116
Publisher site
See Article on Publisher Site

Abstract

A numerical study is performed to investigate turbulent flowcharacteristics in a pipe rotating around the axis. Emphasis is placed on theeffect of pipe rotation on the friction coefficient and velocity distributionin the hydrodynamically, fullydeveloped flow region. Thek turbulence model is modified by taking the swirling effect intoaccount, in which the model function including the Richardson number isintroduced to the equation. The governing boundarylayerequations are discretized by means of a control volumefinitedifference technique for numerical computation.Results obtained from the modified model agree well with experiment data inthe existing literature. It is found from the study that i anaxial rotation of the pipe induces an attenuation in the turbulent kineticenergy, resulting in a reduction in the friction coefficient, the turbulentand ii an increase in the velocity ratio causes substantialdecreases in the friction coefficient, the turbulent kinetic energy and thestreamwise velocity gradient near the wall.

Journal

International Journal of Numerical Methods for Heat and Fluid Flow – Emerald Publishing

Published: Feb 1, 1995

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