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\begin{document}

\title{Experimental study on breakup of a single bubble in a stirred tank:
Effect of gas density and liquid properties}



\author[1]{Huahai Zhang}%
\author[1]{Yuelin Wang}%
\author[1]{Ali Sayyar}%
\author[1]{Tiefeng Wang}%
\affil[1]{Tsinghua University}%


\vspace{-1em}



  
  \date{May 25, 2024}


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\begin{abstract}
Bubble breakup plays an important role in gas-liquid flows, but detailed
studies are still scarce. In this work, the breakup behavior of a single
bubble in a stirred tank was experimentally studied with a high-speed
camera, focusing on the effect of gas density, liquid properties,
agitation speed and mother bubble size. The bubble breakup time, breakup
probability, breakup rate and daughter bubble size distribution were
determined. The internal flow phenomenon inside a deformed bubble was
studied in detail, which accounted for the effect of gas density or
operating pressure. The results showed that with increasing gas density,
agitation speed, mother bubble size and decreasing surface tension, the
bubble breakup rate and probability of equal-size distribution
significantly increased. With increasing liquid viscosity, the bubble
breakup rate decreased especially in the high viscosity range. An
M-shaped daughter bubble size distribution was observed, which was
consistent with our previous bubble breakup model.%
\end{abstract}%



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