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Numerical investigation of strong compression of vapor inside spherical cavitation bubbles

机译:球形空化泡沫中蒸汽强压缩的数值研究

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Numerical investigation of possibility of realizing shock waves in cavitation bubbles during their collapse in water, acetone, and tetradecane is performed. The radius of the bubble is 500 urn, the liquid pressure and temperature are in the ranges of 1-100 bar and 293-313 K, respectively. A numerical technique is used in which the movement of the interphase boundary is governed by the Rayleigh-Plesset equation. The thermodynamic parameters of the vapor are assumed uniform, the state of the vapor being described by the modified Van der Waals equation. The shock waves inside a bubble in tetradecane are found to arise in all the conditions under consideration. By contrast, inside the bubble in acetone they do not appear at relatively low pressures, while inside the bubble in water they never arise. At equal initial data the shock wave is formed much closer to the interface in the case of tetradecane.
机译:进行了在水,丙酮和十四烷下实现空化泡沫中的冲击波可能性的数值研究。气泡的半径为500瓮,液体压力和温度分别为1-100巴的范围和293-313 k。使用数值技术,其中间隔边界的移动由瑞利 - Plesset方程管辖。假设蒸汽的热力学参数均匀,由改进的范德瓦尔斯方程描述的蒸汽的状态。发现四烷内的泡沫内的冲击波在所考虑的所有条件下出现。相比之下,在丙酮中的气泡内,它们不会出现在相对较低的压力下,同时在它们中从未出现的水中的泡沫中。在等初级数据时,在四叉内的情况下,冲击波形成更接近界面。

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