用低阶沉浸边界法捕捉声悬浮液滴的动力学特性

IF 4.1 2区 工程技术 Q1 MECHANICS
Jacqueline B. Sustiel, David G. Grier
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引用次数: 0

摘要

我们提出了一种沉浸边界(IB)方法的变体,它采用声学扰动理论来模拟声学悬浮液滴。我们的混合方法不是对声波进行数值解析,而是对声散射进行半解析求解,从而得到液滴上相应的时间平均声力。这种框架允许在感兴趣的惯性时间尺度上模拟液滴,因此与传统的可压缩流求解器相比,其工作时间步长要大得多。为了对这一技术进行基准测试并证明其实用性,我们对驻波中的单个液滴实施了混合 IB 方法。模拟的液滴形状变形和流动曲线与现有的理论预测一致。我们的模拟还深入分析了椭圆液滴的流场剖面,目前还没有全面的分析解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamics of an acoustically levitated fluid droplet captured by a low-order immersed boundary method
We present a variant of the immersed boundary (IB) method that implements acoustic perturbation theory to model acoustically levitated fluid droplets. Instead of resolving sound waves numerically, our hybrid method solves acoustic scattering semi-analytically to obtain the corresponding time-averaged acoustic forces on the droplet. This framework allows the droplet to be simulated on inertial timescales of interest, and therefore works with much larger time steps than traditional compressible flow solvers. To benchmark this technique and demonstrate its utility, we implement the hybrid IB method for a single droplet in a standing wave. Simulated droplet shape deformations and streaming profiles agree with available theoretical predictions. Our simulations also yield insights into the streaming profiles for elliptical droplets, for which a comprehensive analytic solution does not yet exist.
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来源期刊
Physics of Fluids
Physics of Fluids 物理-力学
CiteScore
6.50
自引率
41.30%
发文量
2063
审稿时长
2.6 months
期刊介绍: Physics of Fluids (PoF) is a preeminent journal devoted to publishing original theoretical, computational, and experimental contributions to the understanding of the dynamics of gases, liquids, and complex or multiphase fluids. Topics published in PoF are diverse and reflect the most important subjects in fluid dynamics, including, but not limited to: -Acoustics -Aerospace and aeronautical flow -Astrophysical flow -Biofluid mechanics -Cavitation and cavitating flows -Combustion flows -Complex fluids -Compressible flow -Computational fluid dynamics -Contact lines -Continuum mechanics -Convection -Cryogenic flow -Droplets -Electrical and magnetic effects in fluid flow -Foam, bubble, and film mechanics -Flow control -Flow instability and transition -Flow orientation and anisotropy -Flows with other transport phenomena -Flows with complex boundary conditions -Flow visualization -Fluid mechanics -Fluid physical properties -Fluid–structure interactions -Free surface flows -Geophysical flow -Interfacial flow -Knudsen flow -Laminar flow -Liquid crystals -Mathematics of fluids -Micro- and nanofluid mechanics -Mixing -Molecular theory -Nanofluidics -Particulate, multiphase, and granular flow -Processing flows -Relativistic fluid mechanics -Rotating flows -Shock wave phenomena -Soft matter -Stratified flows -Supercritical fluids -Superfluidity -Thermodynamics of flow systems -Transonic flow -Turbulent flow -Viscous and non-Newtonian flow -Viscoelasticity -Vortex dynamics -Waves
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