Dynamic Characteristics of Bed Collapse in Three-phase Fluidized Beds

Dong Hyun Lee, Sung Soo Park, Won Woong Choi, Duk Joon Kim, Ji Heung Kim, Young Kwan Lee, Sang Jun Sim, Sang Done Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Transient behavior of the bed collapse after shut-off the gas supply into a three-phase fluidized bed was determined. Experiments were carried out in a 210-mm diameter half-tube acrylic column having a 1.8 m-high test section. The polymer beads (dp=3.2 mm, ρs=1,280kg/m3) were fluidized by cocurrent flow of deionized water and air. The transient behavior of the bed collapse after cut-off the gas supply to the bed was monitored by a video camera (30 frames/s). The dense bed surface height was measured from the image of videotape. At lower liquid velocity, the dense bed surface increases with the elapsed time and then reaches a bed height, whereas at higher liquid velocity the dense bed surface increases sharply with the elapsed time, then decreases and reaches the bed height corresponding to the liquid-solid fluidized beds (water-polymer beads).

Original languageEnglish
Pages (from-to)1166-1169
Number of pages4
JournalKorean Journal of Chemical Engineering
Issue number6
Publication statusPublished - 2003 Nov
Externally publishedYes

Bibliographical note

Funding Information:
This research work was supported by the faculty research fund from the SungKyunKwan University, 2002. The authors from the SungKyunKwan University wish to thank the Ministry of Education for partially financial support (BK-21 Project).


  • Bed Collapse
  • Dense Bed Height
  • Dynamic Characteristics
  • Three-Phase Fluidized Beds

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


Dive into the research topics of 'Dynamic Characteristics of Bed Collapse in Three-phase Fluidized Beds'. Together they form a unique fingerprint.

Cite this