An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed

Y. Q. Feng, A. B. Yu

Research output: Contribution to conferencePaperOther

Abstract

The dynamic behavior of individual particles during the mixing/segregation process of particle mixtures in a gas fluidized bed is analyzed. The analysis is based on the results generated from discrete particle simulation, with the focus on the trajectory of and forces acting on individual particles. Typical particles are selected representing three kinds of particle motions: a flotsam particle which is initially at the bottom part of the bed and finally fluidized at the top part of the bed; a jetsam particle which is initially at the top part of the bed and finally stays in the bottom de-fluidized layer of the bed; and a jetsam particle which is intermittently joining the top fluidized and bottom de-fluidized layer. The results show that the motion of a particle is chaotic at macroscopic or global scale, but can be well explained at microscopic scale in terms of its interaction forces and contact conditions with other particles, particle-fluid interaction force, and local flow structure. They highlight the need for establishing a suitable method to link the information generated and modeled at different time and length scales.

Original languageEnglish
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology - Orlando, FL, United States of America
Duration: 23 Apr 200627 Apr 2006

Conference

Conference2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology
CountryUnited States of America
CityOrlando, FL
Period23/04/0627/04/06

Keywords

  • Discrete particle simulation
  • Fluidization
  • Granular dynamics
  • Segregation

Cite this

Feng, Y. Q., & Yu, A. B. (2006). An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed. Paper presented at 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology, Orlando, FL, United States of America.
Feng, Y. Q. ; Yu, A. B. / An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed. Paper presented at 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology, Orlando, FL, United States of America.
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abstract = "The dynamic behavior of individual particles during the mixing/segregation process of particle mixtures in a gas fluidized bed is analyzed. The analysis is based on the results generated from discrete particle simulation, with the focus on the trajectory of and forces acting on individual particles. Typical particles are selected representing three kinds of particle motions: a flotsam particle which is initially at the bottom part of the bed and finally fluidized at the top part of the bed; a jetsam particle which is initially at the top part of the bed and finally stays in the bottom de-fluidized layer of the bed; and a jetsam particle which is intermittently joining the top fluidized and bottom de-fluidized layer. The results show that the motion of a particle is chaotic at macroscopic or global scale, but can be well explained at microscopic scale in terms of its interaction forces and contact conditions with other particles, particle-fluid interaction force, and local flow structure. They highlight the need for establishing a suitable method to link the information generated and modeled at different time and length scales.",
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Feng, YQ & Yu, AB 2006, 'An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed' Paper presented at 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology, Orlando, FL, United States of America, 23/04/06 - 27/04/06, .

An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed. / Feng, Y. Q.; Yu, A. B.

2006. Paper presented at 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology, Orlando, FL, United States of America.

Research output: Contribution to conferencePaperOther

TY - CONF

T1 - An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed

AU - Feng, Y. Q.

AU - Yu, A. B.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - The dynamic behavior of individual particles during the mixing/segregation process of particle mixtures in a gas fluidized bed is analyzed. The analysis is based on the results generated from discrete particle simulation, with the focus on the trajectory of and forces acting on individual particles. Typical particles are selected representing three kinds of particle motions: a flotsam particle which is initially at the bottom part of the bed and finally fluidized at the top part of the bed; a jetsam particle which is initially at the top part of the bed and finally stays in the bottom de-fluidized layer of the bed; and a jetsam particle which is intermittently joining the top fluidized and bottom de-fluidized layer. The results show that the motion of a particle is chaotic at macroscopic or global scale, but can be well explained at microscopic scale in terms of its interaction forces and contact conditions with other particles, particle-fluid interaction force, and local flow structure. They highlight the need for establishing a suitable method to link the information generated and modeled at different time and length scales.

AB - The dynamic behavior of individual particles during the mixing/segregation process of particle mixtures in a gas fluidized bed is analyzed. The analysis is based on the results generated from discrete particle simulation, with the focus on the trajectory of and forces acting on individual particles. Typical particles are selected representing three kinds of particle motions: a flotsam particle which is initially at the bottom part of the bed and finally fluidized at the top part of the bed; a jetsam particle which is initially at the top part of the bed and finally stays in the bottom de-fluidized layer of the bed; and a jetsam particle which is intermittently joining the top fluidized and bottom de-fluidized layer. The results show that the motion of a particle is chaotic at macroscopic or global scale, but can be well explained at microscopic scale in terms of its interaction forces and contact conditions with other particles, particle-fluid interaction force, and local flow structure. They highlight the need for establishing a suitable method to link the information generated and modeled at different time and length scales.

KW - Discrete particle simulation

KW - Fluidization

KW - Granular dynamics

KW - Segregation

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M3 - Paper

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Feng YQ, Yu AB. An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed. 2006. Paper presented at 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology, Orlando, FL, United States of America.