A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet

Siddhartha Shrestha, Jieqing Gan, Aibing Yu, Zongyan Zhou

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Bubbles properties play an important role in determining the characteristics of gas-solid fluidized beds and thus influence the bed performance significantly. In this work, the bubble properties are studied by the combined approach of CFD and DEM for bubbling gas-solid fluidized beds operated with a continuous central jet. The process of the continuous injection of a central air jet to the bed is successfully reproduced featured with the formation of series of bubbles which rise through the bed and burst at the bed top. The bubbles are categorised as two types: primary/leading bubbles and trailing bubbles. The size of the primary bubble keeps on increasing with bed height while the size of the trailing bubble decreases since trailing bubble is coalescing with the primary bubble. The primary bubbles although formed at different times are of similar shape while the trailing bubbles are generally elongated in shape. The bubble velocity is distinctly different for primary and trailing bubbles.

Original languageEnglish
Title of host publication8th World Congress on Particle Technology 2018
Subtitle of host publicationKeynotes and Plenaries
PublisherAIChE
Pages74-82
Number of pages9
ISBN (Electronic)9781510869769
Publication statusPublished - 2018
EventWorld Congress on Particle Technology 2018 : Keynotes and Plenaries - Orlando, United States of America
Duration: 22 Apr 201826 Apr 2018
Conference number: 8th

Conference

ConferenceWorld Congress on Particle Technology 2018
CountryUnited States of America
CityOrlando
Period22/04/1826/04/18

Keywords

  • Bubble formation
  • Bubble shape
  • Bubble size
  • CFD-DEM
  • Single jet

Cite this

Shrestha, S., Gan, J., Yu, A., & Zhou, Z. (2018). A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet. In 8th World Congress on Particle Technology 2018: Keynotes and Plenaries (pp. 74-82). AIChE.
Shrestha, Siddhartha ; Gan, Jieqing ; Yu, Aibing ; Zhou, Zongyan. / A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet. 8th World Congress on Particle Technology 2018: Keynotes and Plenaries. AIChE, 2018. pp. 74-82
@inproceedings{a90d09e96135421294316fd31207faa8,
title = "A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet",
abstract = "Bubbles properties play an important role in determining the characteristics of gas-solid fluidized beds and thus influence the bed performance significantly. In this work, the bubble properties are studied by the combined approach of CFD and DEM for bubbling gas-solid fluidized beds operated with a continuous central jet. The process of the continuous injection of a central air jet to the bed is successfully reproduced featured with the formation of series of bubbles which rise through the bed and burst at the bed top. The bubbles are categorised as two types: primary/leading bubbles and trailing bubbles. The size of the primary bubble keeps on increasing with bed height while the size of the trailing bubble decreases since trailing bubble is coalescing with the primary bubble. The primary bubbles although formed at different times are of similar shape while the trailing bubbles are generally elongated in shape. The bubble velocity is distinctly different for primary and trailing bubbles.",
keywords = "Bubble formation, Bubble shape, Bubble size, CFD-DEM, Single jet",
author = "Siddhartha Shrestha and Jieqing Gan and Aibing Yu and Zongyan Zhou",
year = "2018",
language = "English",
pages = "74--82",
booktitle = "8th World Congress on Particle Technology 2018",
publisher = "AIChE",
address = "United States of America",

}

Shrestha, S, Gan, J, Yu, A & Zhou, Z 2018, A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet. in 8th World Congress on Particle Technology 2018: Keynotes and Plenaries. AIChE, pp. 74-82, World Congress on Particle Technology 2018 , Orlando, United States of America, 22/04/18.

A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet. / Shrestha, Siddhartha; Gan, Jieqing; Yu, Aibing; Zhou, Zongyan.

8th World Congress on Particle Technology 2018: Keynotes and Plenaries. AIChE, 2018. p. 74-82.

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

TY - GEN

T1 - A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet

AU - Shrestha, Siddhartha

AU - Gan, Jieqing

AU - Yu, Aibing

AU - Zhou, Zongyan

PY - 2018

Y1 - 2018

N2 - Bubbles properties play an important role in determining the characteristics of gas-solid fluidized beds and thus influence the bed performance significantly. In this work, the bubble properties are studied by the combined approach of CFD and DEM for bubbling gas-solid fluidized beds operated with a continuous central jet. The process of the continuous injection of a central air jet to the bed is successfully reproduced featured with the formation of series of bubbles which rise through the bed and burst at the bed top. The bubbles are categorised as two types: primary/leading bubbles and trailing bubbles. The size of the primary bubble keeps on increasing with bed height while the size of the trailing bubble decreases since trailing bubble is coalescing with the primary bubble. The primary bubbles although formed at different times are of similar shape while the trailing bubbles are generally elongated in shape. The bubble velocity is distinctly different for primary and trailing bubbles.

AB - Bubbles properties play an important role in determining the characteristics of gas-solid fluidized beds and thus influence the bed performance significantly. In this work, the bubble properties are studied by the combined approach of CFD and DEM for bubbling gas-solid fluidized beds operated with a continuous central jet. The process of the continuous injection of a central air jet to the bed is successfully reproduced featured with the formation of series of bubbles which rise through the bed and burst at the bed top. The bubbles are categorised as two types: primary/leading bubbles and trailing bubbles. The size of the primary bubble keeps on increasing with bed height while the size of the trailing bubble decreases since trailing bubble is coalescing with the primary bubble. The primary bubbles although formed at different times are of similar shape while the trailing bubbles are generally elongated in shape. The bubble velocity is distinctly different for primary and trailing bubbles.

KW - Bubble formation

KW - Bubble shape

KW - Bubble size

KW - CFD-DEM

KW - Single jet

UR - http://www.scopus.com/inward/record.url?scp=85059085515&partnerID=8YFLogxK

M3 - Conference Paper

SP - 74

EP - 82

BT - 8th World Congress on Particle Technology 2018

PB - AIChE

ER -

Shrestha S, Gan J, Yu A, Zhou Z. A CFD-DEM study of bubble properties in fluidzed beds operated with a single jet. In 8th World Congress on Particle Technology 2018: Keynotes and Plenaries. AIChE. 2018. p. 74-82