NDLI: Numerical study on characteristics of turbulent two-phase gas-particle flow using multi-fluid model

Content Provider	Springer Nature Link
Author	Min, Dong Ho Yoon, Kyung Beom Chang, Hee Chul Kim, Tae Kuk
Copyright Year	2008
Abstract	The purpose of this research is to study numerically the turbulent gas-particle two-phase flow characteristics using the Eulerian-Eulerian method. A computer code is developed for the numerical study by using the k-ɛ-k $_{ p }$ two-phase turbulent model. The developed code is applied for particle-laden flows in which the particle volume fraction is between 10$^{−5}$ and 10$^{−2}$ for the Stokes numbers smaller than unity. The gas and particle velocities and the particle volume fraction obtained by using this code are in good agreement with those obtained by a commercial code for the gas-particle jet flows within a rectangular enclosure. The gas-particle jet injected into a vertical rectangular 3D enclosure is numerically modeled to study the effect of the Stokes number, the particle volume fraction and the particle Reynolds numbers. The numerical results show that the Stokes number and the particle volume fraction are important parameters in turbulent gas-particle flows. A small Stokes number (St ≤ 0.07) implies that the particles are nearly at the velocity equilibrium with the gas phase, while a large Stokes number (St ≥ 0.07) implies that the slip velocity between the gas and particle phase increases and the particle velocity is less affected by the gas phase. A large particle volume fraction (α $_{ p }$ ≥ 0.0001) implies that the effect of the particles on the gas phase momentum increases, while a small particle volume fraction (α $_{ p }$ ≤ 0.0001) implies that the particles would have no or small effect on the gas flow field. For fixed Stokes number and particle volume fraction, an increase of the particle Reynolds number results in a decrease of the slip velocity between the gas and particle velocities.
Starting Page	1436
Ending Page	1443
Page Count	8
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	22
Issue Number	7
e-ISSN	19763824
Language	English
Publisher	Korean Society of Mechanical Engineers
Publisher Date	2008-10-04
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Two-phase flow Eulerian-Eulerian method Stokes number Particle volume fraction Gas-particle jet Industrial and Production Engineering Vibration, Dynamical Systems, Control Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering

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