在超声波引起的泡崩期间使用真实流体状态方程预测冲击加热
Saeed Bidi1, Armand Shams2, Phoevos Koukouvinis2
1School of Mathematics, Computer Sciences & Engineering, City, University of London, UK; Institut Jean Le Rond D'Alembert, Sorbonne Université and CNRS UMR 7190, F-75005 Paris, France.
Ultrasonics sonochemistry
|December 1, 2023
概括
准确的状态方程 (EoS) 对于模拟崩的气泡至关重要,防止非物理的温度跳跃. 先进的EoS模型揭示了在固体墙壁附近泡崩动态的新见解,特别是在冲击波石术应用中.
科学领域:
- 流体动力学 流体动力学
- 热力学是一种热力学.
- 计算物理学的计算物理.
背景情况:
- 准确的模拟崩的气泡需要复杂的状态方程 (EoS) 液体和气体相.
- 简化的EoS可以导致非物理结果,例如在泡接口附近的虚假液体温度跳跃.
- 以前的模拟经常使用不太准确的EoS,限制了他们的预测能力.
研究的目的:
- 通过使用先进的EoS,对崩的气泡进行数值模拟.
- 通过突出简化模型的问题来说明准确的EdS的必要性.
- 为了研究模拟冲击波石 (SWL) 的条件下,在固体墙壁附近的泡崩.
主要方法:
- 用卡皮拉的机械平衡多相方法来计算流体流动方程.
- 实施了各种 EoS,包括刚性气体 (SG),国际水和蒸汽属性协会 (IAPWS),修改的贵族阿贝尔刚性气体 (MNASG) 和一种新的修改的泰特 EoS.
- 采用AMReX平台进行高性能计算,并行处理和自适应网状精制 (AMR).
主要成果:
- 证明了硬化气体 (SG) EoS在高压缩过程中过度预测液体温度.
- 首次突出了各种EdS模型之间的差异,用于泡崩.
- 在固体墙壁附近模拟泡崩,由于冲击波聚焦,液体温度最大增加25K.
结论:
- 准确的EoS对于可靠的泡崩模拟是必不可少的.
- 开发的模型准确地捕捉了泡在固体边界附近崩时的热效应.
- 在泡崩期间,在墙壁附近的液体加热取决于泡墙的初始隔离距离,这对SWL有影响.
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