Visualization of flow structures inside a conical spouted bed by electrical capacitance volume tomography--颗粒学报PARTICUOLOGY

Park, H. C., & Choi, H. S. (2019). Visualization of flow structures inside a conical spouted bed by electrical capacitance volume tomography. Particuology, 42, 15-25. https://doi.org/10.1016/j.partic.2018.01.002

Visualization of flow structures inside a conical spouted bed by electrical capacitance volume tomography

Hoon Chae Park, Hang Seok Choi ^*

Department of Environmental Engineering, Yonsei University, Wonju 26493, Republic of Korea

10.1016/j.partic.2018.01.002

Volume 42, February 2019, Pages 15-25

Received 31 October 2017, Revised 5 January 2018, Accepted 7 January 2018, Available online 23 May 2018, Version of Record 21 January 2019.

E-mail: hs.choi@yonsei.ac.kr

Highlights

• ECVT was conducted to measure instantaneous gas–solid flow structures in a conical spouted bed.

• The flow structures were analyzed based on ECVT images and power spectral density (PSD) analysis.

• PSD analyses of pressure fluctuations and ECVT measurements showed different flow regimes.

Abstract

Electrical capacitance volume tomography (ECVT) was conducted to measure instantaneous gas–solid flow structures in a conical spouted bed. The sensor has 24 electrodes/channels and was used to make three-dimensional measurements of the solid volume fraction. Flow structures in the conical spouted bed were analyzed using quantitative ECVT images. Three-dimensional images of gas–solid flow structures and time-averaged vertical and radial solid volume fraction profiles are presented. Different fluidization regimes in spouted beds were characterized by analyzing pressure fluctuation signals and ECVT images. ECVT was shown to be robust and powerful for the three-dimensional visualization and quantitative measurement of a gas–solid fluidization system.

Graphical abstract

Keywords

Conical spouted bed; Electrical capacitance volume tomography; Multiphase flow

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