Deformation and breakup of compound droplets in airflow

Xu, Zhikun; Zhang, Yue; Wang, Tianyou; Che, Zhizhao

doi:10.1016/j.jcis.2023.09.034

Journal of Colloid and Interface Science

2024

DOI: 10.1016/j.jcis.2023.09.034

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Deformation and breakup of compound droplets in airflow

Zhikun Xu,

Yue Zhang,

Tianyou Wang

et al.

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2024

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Cited by 2 publications

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Aerodynamic breakup of emulsion droplets in airflow

Xu,

Liu,

Zhang

et al. 2024

Droplet

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Aerodynamic breakup refers to the process where large droplets are fragmented into small droplets by the aerodynamic force in airflow, which plays a vital role in fluid atomization and spray applications. Previous research has primarily concentrated on the aerodynamic breakup of single‐component droplets, but investigations into the breakup of emulsion droplets are limited. This study experimentally investigated the aerodynamic breakup of water‐in‐oil emulsions in airflow, utilizing high‐speed photography to observe the breakup process and digital in‐line holography to measure fragment sizes. Comparative analyses between emulsion droplets and single‐component droplets are conducted to examine the breakup morphology, breakup regime, deformation characteristics, and fragment size distributions. The emulsion droplets exhibit higher apparent viscosity and shorter stretching lengths of the bag film and peripheral rim due to the presence of a dispersed phase. The breakup regime transitions of emulsions are modeled by integrating the viscosity model of emulsions and the transition model of the pure fluid. The fragment sizes of emulsion droplets are larger due to the shorter lengths of the bag film and peripheral rim.

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Aerodynamic breakup of emulsion droplets in airflow

Xu,

Liu,

Zhang

et al. 2024

Droplet

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Research progress of jet washing technology and its exploratory decoking application in delayed coking process

Lv,

Wang,

Yan

et al. 2024

Reviews in Chemical Engineering

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Considering the distinctive features of the delayed coking process and taking into account various particulate matter control technologies, the feasibility of using jet washing technology to remove coke powder from process gas is explored. The performance of scrubbers is heavily reliant on the quality of atomization, which in turn is influenced by liquid jet breakup. Due to the multiple interactions of various instabilities involved in jet breakup, as well as the short duration and small scale of this process, it is challenging to observe experimentally. Therefore, the specific fluid dynamics processes are not yet clear. In recent years, extensive research has been conducted on research methods, jet breakup modes, jet breakup characteristics, and jet breakup mechanisms. However, there is a lack of comprehensive review work summarizing these research advancements. This article aims to provide a comprehensive overview to facilitate jet scrubber designers’ systematic understanding of progress in jet breakup research. Furthermore, it discusses the significance of studying confined spaces for jet breakup with the objective of providing valuable insights for designing and optimizing delayed coker.

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Deformation and breakup of compound droplets in airflow

Cited by 2 publications

References 35 publications

Aerodynamic breakup of emulsion droplets in airflow

Aerodynamic breakup of emulsion droplets in airflow

Research progress of jet washing technology and its exploratory decoking application in delayed coking process

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