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Microstructure, transport, and acoustic properties of open-cell foam samples: Experiments and three-dimensional numerical simulations

机译：开孔泡沫样品的微观结构，传输和声学特性：实验和三维数值模拟

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摘要

This article explores the applicability of numerical homogenization techniques for analyzing transport properties in real foam samples, mostly open-cell, to understand long-wavelength acoustics of rigid-frame air-saturated porous media on the basis of microstructural parameters. Experimental characterization of porosity and permeability of real foam samples are used to provide the scaling of a polyhedral unit-cell. The Stokes, Laplace, and diffusion-controlled reaction equations are numerically solved in such media by a finite element method in three-dimensions; an estimation of the materials' transport parameters is derived from these solution fields. The frequency-dependent visco-inertial and thermal response functions governing the long-wavelength acoustic wave propagation in rigid-frame porous materials are then determined from generic approximate but robust models and compared to standing wave tube measurements. With no adjustable constant, the predicted quantities were found to be in acceptable agreement with multi-scale experimental data and further analyzed in light of scanning electron micrograph observations and critical path considerations.
机译：本文探讨了数值均化技术在分析实际泡沫样品（主要是开孔样品）中的传输特性时的适用性，以基于微结构参数了解刚性框架空气饱和多孔介质的长波声学特性。实际泡沫样品的孔隙率和渗透率的实验表征可用于提供多面体晶胞的缩放比例。斯托克斯，拉普拉斯和扩散控制的反应方程式是通过三维有限元方法在这种介质中数值求解的。从这些解决方案领域可以得出物料运输参数的估算值。然后，从通用的近似但稳健的模型中确定控制刚性框架多孔材料中长波声波传播的频率相关的粘惯性和热响应函数，并将其与驻波管测量结果进行比较。在没有可调常数的情况下，发现预测量与多尺度实验数据在可接受的范围内，并根据扫描电子显微镜观察和关键路径考虑因素进行了进一步分析。

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  • 来源
    《Journal of Applied Physics》 |2012年第1期|p.014911.1-014911.16|共16页
  • 作者

    Camille Perrot; Fabien Chevillotte; Minh Tan Hoang; Guy Bonnet; Francois-Xavier Becot; Laurent Gautron; Arnaud Duval;

  • 作者单位

    Universite Paris-Est, Laboratoire Modelisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, Marne-la-Vallee 77454, France,Universite de Sherbrooke, Department of Mecfianical Engineering, Quebec J1K 2R1, Canada;

    Matelys - Acoustique & Vibrations, 1 rue Baumer, Vaulx-en-Velin F-69120, France;

    Universite Paris-Est, Laboratoire Modelisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, Marne-la-Vallee 77454, France,Faurecia Acoustics and Soft Trim Division, R&D Center, Route de Villemontry, Z.I, BP13, Mouzon 08210, France;

    Universite Paris-Est, Laboratoire Modelisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, Marne-la-Vallee 77454, France;

    Matelys - Acoustique & Vibrations, 1 rue Baumer, Vaulx-en-Velin F-69120, France;

    Universite Paris-Est, Laboratoire Geomateriaux et Environnement, LGE EA 4508, 5 bd Descartes, Marne-la-Vallee 77454, France;

    Faurecia Acoustics and Soft Trim Division, R&D Center, Route de Villemontry, Z.I, BP13, Mouzon 08210, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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