Generation and evolution of cavitation in magma under dynamic unloading

Davydov, M. N.; Kedrinskii, V. K.; Chernov, A. A.; Takayama, K.

doi:10.1007/pl00021898

Cited by 2 publications

(4 citation statements)

References 13 publications

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“…• For the boiling regime case, where bubble acceleration is dominated by diffusion into the bubble due to the vapor pressure -gas pressure difference (8), the addition of a non-isothermal gas pressure is necessary because the latent heat produced by the transformation has lowered the temperature. This lower gas pressure increases the rate at which diffusion into the bubble occurs.…”

Section: T85r3mentioning

confidence: 99%

“…The cavitation and growth of micro-bubbles in superheated or stretched liquids is a common process in nature, and is relevant in many areas of fundamental science, medicine and engineering. Examples include phase changes in the early universe [1], the direct detection of dark matter [2], targeted drug delivery [3], stimulating accelerated healing of bone fractures [4], cavitation corrosion of water-exposed materials [5,6], volcano fountaining [7,8], and flavor infusion of plant matter into alcohol in the kitchen [9]. However, our understanding of bubble kinetics and dynamics is very limited.…”

Section: Introductionmentioning

confidence: 99%

“…14. (Color online)Top row: gas densities solutions, equation(8), for the coupled RP-diffusion system. The fit via viscosity µ and α is done for the bubble sizes (red dots in figure13).…”

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confidence: 99%

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Bubble evolution and properties in homogeneous nucleation simulations

et al. 2014

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We analyze the properties of naturally formed nanobubbles in Lennard-Jones molecular dynamics simulations of liquid-to-vapor nucleation in the boiling and the cavitation regimes. The large computational volumes provide a realistic environment at unchanging average temperature and liquid pressure, which allows us to accurately measure properties of bubbles from their inception as stable, critically sized bubbles, to their continued growth into the constant speed regime. Bubble gas densities are up to 50% lower than the equilibrium vapor densities at the liquid temperature, yet quite close to the gas equilibrium density at the lower gas temperatures measured in the simulations: The latent heat of transformation results in bubble gas temperatures up to 25% below those of the surrounding bulk liquid. In the case of rapid bubble growth-typical for the cavitation regime-compression of the liquid outside the bubble leads to local temperature increases of up to 5%, likely significant enough to alter the surface tension as well as the local viscosity. The liquid-vapor bubble interface is thinner than expected from planar coexistence simulations by up to 50%. Bubbles near the critical size are extremely nonspherical, yet they quickly become spherical as they grow. The Rayleigh-Plesset description of bubble-growth gives good agreement in the cavitation regime.

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Section: T85r3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bubble evolution and properties in homogeneous nucleation simulations

et al. 2014

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“…Cavitation, on the other hand, is not as mundane, nonetheless it is ubiquitous. Theories of cavitation have been used to explain extreme phenomena that occur over various length scales; from the formation of craters by meteorite impact [1,2], volcanic eruptions [3,4], underground explosions [5][6][7][8], and penetration phenomena [9,10]; to the exposure of seeds in ripening crop (see Supplementary Information S2), and to morphogenesis processes that occur in crucial stages of embryonic development [11,12]. Moreover, cavitation is employed in medical applications to enhance drug delivery, and to treat cancer [13][14][15], it has been indicated as a primary mechanism of damage in traumatic brain injury [16][17][18], and has been shown to provide a means for probing of local material properties in soft and biological materials [19][20][21][22][23].…”

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The intimate relationship between cavitation and fracture

2019

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Nearly three decades ago, the field of mechanics was cautioned of the obscure nature of cavitation processes in soft materials [Gent, A.N., 1990. Cavitation in rubber: a cautionary tale. Rubber Chemistry and Technology, 63 (3)]. Since then, the debate on the mechanisms that drive this failure process is ongoing. Using a high precision volume controlled cavity expansion procedure, this paper reveals the intimate relationship between cavitation and fracture. Combining a Griffith inspired formulation for crack propagation, and a Gent inspired formulation for cavity expansion, we show that despite the apparent complexity of the fracture patterns, the pressure-volume response follows a predictable path. In contrast to available studies, both the model and our experiments are able to track the entire process including the unstable branch, by controlling the volume of the cavity. Moreover, this minimal theoretical framework is able to explain the ambiguity in previous experiments by revealing the presence of metastable states that can lead to first order transitions at onset of fracture. The agreement between the simple theory and all of the experimental results conducted in PDMS samples with shear moduli in the range of , confirms that cavitation and fracture work together in driving the expansion process. Through this study we also determine the fracture energy of PDMS and show its significant dependence on strain stiffening. arXiv:1903.05224v1 [cond-mat.soft]

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Generation and evolution of cavitation in magma under dynamic unloading

Cited by 2 publications

References 13 publications

Bubble evolution and properties in homogeneous nucleation simulations

Bubble evolution and properties in homogeneous nucleation simulations

The intimate relationship between cavitation and fracture

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