论文标题

吉尔莫尔 - 纳斯格(Gilmore-NASG)模型,用于预测可压缩液体中的单毛生气体

The Gilmore-NASG model to predict single-bubble cavitation in compressible liquids

论文作者

Denner, Fabian

论文摘要

Gilmore模型与状态的Noble-Abel渗透气体(NASG)方程相结合,以产生一个简单的模型,以预测基于实际气体热力学的球形气泡的膨胀和崩溃。 NASG的状态方程解决了与液体常用状态的泰特务方程相关的温度不准确性,因此可以对气泡含量和空化过程中气泡含量的可压缩和热效应提供一致的描述。 After a detailed derivation of the proposed Gilmore-NASG model, the differences between the classical Gilmore-Tait model and the proposed model are highlighted with results of single-bubble cavitation related to bubble collapse and driven by an acoustic excitation in frequency and amplitude regimes relevant to sonoluminescence, high-intensity focused ultrasound and shock wave lithotripsy.特别是对于快速和暴力崩溃的气泡,可以在提出的吉尔莫尔 - 纳斯格模型和经典的吉尔莫尔泰特塔特模型之间观察到气泡行为的实质性差异。 Gilmore-NASG模型同时预测气体,蒸气和液体中的可靠压力和温度值的能力使所提出的模型对超声量和生物医学应用特别有吸引力。

The Gilmore model is combined with the Noble-Abel-stiffened-gas (NASG) equation of state to yield a simple model to predict the expansion and collapse of spherical bubbles based on real gas thermodynamics. The NASG equation of state resolves the temperature inaccuracy associated with the commonly employed Tait equation of state for liquids and, thus, can provide a consistent description of compressible and thermal effects of the bubble content and the surrounding liquid during cavitation. After a detailed derivation of the proposed Gilmore-NASG model, the differences between the classical Gilmore-Tait model and the proposed model are highlighted with results of single-bubble cavitation related to bubble collapse and driven by an acoustic excitation in frequency and amplitude regimes relevant to sonoluminescence, high-intensity focused ultrasound and shock wave lithotripsy. Especially for rapidly and violently collapsing bubbles, substantial differences in the bubble behaviour can be observed between the proposed Gilmore-NASG model and the classical Gilmore-Tait model. The ability of the Gilmore-NASG model to simultaneously predict reliable pressure and temperature values in gas, vapour and liquid, makes the proposed model particularly attractive for sonochemistry and biomedical applications.

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