4.0 Article

Time Domain Modelling of Sound Propagation in Porous Media and the Role of Shape Factors

期刊

ACTA ACUSTICA UNITED WITH ACUSTICA
卷 96, 期 2, 页码 225-238

出版社

S HIRZEL VERLAG
DOI: 10.3813/AAA.918272

关键词

-

资金

  1. EPSRC [EP/E016529/1]
  2. EPSRC [EP/E016529/1] Funding Source: UKRI
  3. Engineering and Physical Sciences Research Council [EP/E016529/1] Funding Source: researchfish

向作者/读者索取更多资源

An extended formulation of the relaxational model proposed by Wilson et al. in 1993 is presented in this paper. The proposed semi-empirical models for complex tortuosity and compressibility functions satisfy physically correct low and high frequency limits and allow analytical transformation into the time domain. These models are based on the assumption, that two configurations of pore networks with two characteristic size distributions can approximate an internal structure of a porous material. The models require the knowledge of two relaxation times. Numerical time domain calculations confirm that the contribution of both viscous and thermal effects on the evolution of acoustic pulses as they propagate through a porous material can be accounted for simultaneously within the framework of the model. A good agreement between the model predictions with data of different porous materials has been found.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.0
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据