Hybrid approach for simulating flow-induced sound around moving bodies based on ghost-cell immersed boundary method

IF 3.8 2区工程技术 Q1 ENGINEERING, MECHANICAL

Acta Mechanica Sinica Pub Date : 2024-07-22 DOI:10.1007/s10409-024-23621-x

Cheng Zhao (, ), Hong-Gang Li (, ), Xue-Gang Li (, ), Yan Yang (, ), Kai Cui (, )

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引用次数: 0

Abstract

A hybrid approach based on the immersed boundary method (IBM) is developed for computation of flow-induced sound around moving bodies. In this method, a high-fidelity direct numerical simulation (DNS) solver is used to simulate the incompressible flow field. The sound field is predicted by discretizing acoustic perturbation equations (APEs) with dispersion-relation-preserving space scheme and low-dispersion and low-dissipation Runge-Kutta time integration. A sharp-interface IBM based on ghost-cell is implemented for present two-step DNS-APE approach to deal with complex moving bodies with Cartesian grids. The present method is validated through simulations of sound generation caused by flow past a rotating cylinder, an oscillating cylinder, and tandem oscillating and stationary cylinders. The sound generated by typical kinds of complicated bio-inspired locomotions, i.e., flapping flight by wings of varied shapes and collective undulatory swimming in tandem, are investigated using present method. The results demonstrate potential of the hybrid approach in addressing flow-induced sound generation and propagation with complex moving boundaries in a fluid medium, especially for the sound characteristics of bio-mimetic flows, which might shed lights on investigations on bio-acoustics, ethology of complex animal system, and related bio-mimetic design for quietness.

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基于鬼细胞沉浸边界法的运动体周围流诱导声模拟混合方法

本文开发了一种基于沉浸边界法（IBM）的混合方法，用于计算运动体周围的流动诱导声。在这种方法中，高保真直接数值模拟（DNS）求解器用于模拟不可压缩流场。声场是通过声学扰动方程（APEs）的离散化、弥散相关空间方案和低弥散、低耗散 Runge-Kutta 时间积分来预测的。本两步 DNS-APE 方法采用了基于幽灵单元的尖锐界面 IBM，以处理笛卡尔网格的复杂运动体。通过模拟流经旋转圆柱体、摆动圆柱体、串联摆动圆柱体和静止圆柱体时产生的声音，对本方法进行了验证。本方法还研究了典型的复杂生物启发运动所产生的声音，即不同形状的翅膀拍打飞行和集体串联起伏游泳。研究结果表明，混合方法在解决流体介质中复杂运动边界的流动诱导声音产生和传播方面具有潜力，特别是在模拟生物流动的声音特性方面，这可能会对生物声学、复杂动物系统的伦理学以及相关的静音生物模拟设计的研究有所启发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Mechanica Sinica 物理-工程：机械

CiteScore

5.60

自引率

20.00%

发文量

1807

审稿时长

4 months

期刊介绍： Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics