Impact of freely falling liquid containers and subsequent jetting

Krishnan, Sangeeth; Bharadwaj, Sunil V.; Vasan, Vishal

doi:10.1007/s00348-022-03452-3

Cited by 2 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simultaneously, the cavity shrinks with a normal velocity U n due to the sudden reduction of the gas pressure after the film rupture. The tangential motion of the kink, combined with the overall inward shrinkage of the cavity due to reduction in gas pressure is a unique feature of surface bubble cavity collapse, not encountered in open cavity collapse problems as treated by Zeff et al (2000), Bergmann et al (2006), Bartolo et al (2006), Duclaux et al (2007), Das & Hopfinger (2008), Benusiglio, Quéré & Clanet (2014, Thoroddsen et al (2018), Yang, Tian & Thoroddsen (2020 and Krishnan, Bharadwaj & Vasan (2022).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of collapse of free-surface bubbles: effects of gravity and viscosity

Krishnan,

Puthenveettil,

Hopfinger

2024

J. Fluid Mech.

Self Cite

View full text Add to dashboard Cite

The rupture of the thin film at the top of a bubble at a liquid–gas interface leads to an axisymmetric collapse of the bubble cavity. We present scaling laws for such a cavity collapse, established from experiments conducted with bubbles spanning a wide range of Bond ( ${10^{-3}< Bo\leq 1}$ ) and Ohnesorge numbers ( ${10^{-3}< Oh<10^{-1}}$ ), defined with the bubble radius $R$ . The cavity collapse is a capillary-driven process, with a dependency on viscosity and gravity, affecting respectively, precursory capillary waves on the cavity boundary and the static bubble shape. The collapse is characterised by the normal interface velocity ( $U_n$ ) and by the tangential wave propagation velocity of the kink ( $U_t$ ), defined by the intersection of the concave cavity boundary formed after the rupture of the thin film with the convex boundary of the bubble cavity. During the collapse, $U_t$ remains constant and is shown to be $U_t=4.5U_c{\mathcal {W}}_R$ , where $U_c$ is the capillary velocity and ${\mathcal {W}}_R(Oh,Bo)={(1-\sqrt {Oh {\mathscr {L}}} )^{-1/2}}$ is the wave resistance factor due to the precursory capillary waves, with $\mathscr {L}(Bo)$ being the path correction of the kink motion. The movement of the kink in the normal direction is part of the inward shrinkage of the whole cavity due to the sudden reduction of gas pressure inside the bubble cavity after the thin film rupture. This normal velocity is shown to scale as $U_c$ in the equatorial plane, while at the bottom of the cavity $\bar {U}_{nb}=U_c(Z_c/R)({\mathcal {W}_R}/ {\mathscr {L}})$ , where $Z_c(Bo)$ is the static cavity depth. The filling rate of the cavity, which remains a constant throughout the collapse, is shown to be entirely determined by the shrinking velocity and scales as ${Q_T\simeq 2{\rm \pi} R Z_c U_c}$ . From $Q_T$ we recover the jet velocity scaling, thereby relating the cavity collapse with the jet velocity scaling.

show abstract

Section: Discussionmentioning

confidence: 99%

“…(2007), Das & Hopfinger (2008), Benusiglio, Quéré & Clanet (2014), Thoroddsen et al. (2018), Yang, Tian & Thoroddsen (2020) and Krishnan, Bharadwaj & Vasan (2022).…”

Section: Discussionmentioning

confidence: 99%

Dynamics of collapse of free-surface bubbles: effects of gravity and viscosity

Krishnan,

Puthenveettil,

Hopfinger

2024

J. Fluid Mech.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Yukisada et al (2018) found the surface bubbles on the tube can enhance the impact generated jet. Krishnan et al (2022) studied the second jet phenomena of the water-air interface in such an impact tube. Following the impact, the pressure wave is then reflected from the liquid-air interface as a rarefaction wave which then nucleates cavitation bubbles in the tube (Kiyama et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact-driven cavitation bubble dynamics

et al. 2023

View full text Add to dashboard Cite

The dynamics of a single cavitation bubble exposed to a transient acceleration is studied experimentally. A single cavitation bubble is seeded with a pulsed laser in a free-falling and impacting water-filled test tube. After impact, a pressure wave containing compression and rarefaction phases is generated and interacts with the bubble. The bubble dynamics is studied with high-speed imaging and compared to numerical simulations using the Keller–Miksis model. The timing of bubble seeding with respect to the pressure wave is varied, and a regime of enhanced collapse strength is found.

show abstract

Impact of freely falling liquid containers and subsequent jetting

Cited by 2 publications

References 40 publications

Dynamics of collapse of free-surface bubbles: effects of gravity and viscosity

Dynamics of collapse of free-surface bubbles: effects of gravity and viscosity

Impact-driven cavitation bubble dynamics

Contact Info

Product

Resources

About