@Article{cmes.2026.087824,
AUTHOR = {Shiyu Liu, Bingqi Wang, Jiangshan Jin, Jia Liu, Deyu Wang, Pu Cui},
TITLE = {Numerical Investigation of the Interaction between Cavitation and Air Bubbles in a Tube},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {148},
YEAR = {2026},
NUMBER = {2},
PAGES = {0--0},
URL = {http://www.techscience.com/CMES/v148n2/68600},
ISSN = {1526-1506},
ABSTRACT = {The interaction between a cavitation bubble and an air bubble inside a rigid tube is numerically investigated using a compressible volume-of-fluid (VoF) method. Two dimensionless parameters are introduced: the spacing ratio <math id="mml-ieqn-1"><mi>γ</mi></math> and the size ratio <math id="mml-ieqn-2"><mi>η</mi></math>. The simulation results show that the spherical pressure wave generated by the expansion of the cavitation bubble propagates outward and reflects at both the tube wall and the air-liquid interface, creating a complex local pressure field. Based on the jet morphology, three typical regimes are identified, namely reverse jets, opposed jets, and co-directional jets; a phase diagram is constructed to delineate the transition patterns among these regimes in the <math id="mml-ieqn-3"><mo stretchy="false">(</mo><mi>γ</mi><mo>,</mo><mi>η</mi><mo stretchy="false">)</mo></math> parameter space. The jet direction is primarily influenced by two driving effects, i.e., the pressure impulse and the fluid-flow driving effect. This study contributes to a deeper understanding of cavitation-air bubble interaction under wall confinement and may offer useful insights for flow control in microfluidic and other confined liquid systems.},
DOI = {10.32604/cmes.2026.087824}
}