Hybrid numerical and analytical solutions for acoustic boundary problems in thermo-viscous fluids
Hybrid numerical and analytical solutions for acoustic boundary problems in thermo-viscous fluids
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DOI：
10.1016/s0022-460x(02)01098-2
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发表时间：
2003-05-22
影响因子：
4.7
通讯作者：
Bruneau, M
中科院分区：
文献类型：
--
作者：
Bossart, R;Joly, N;Bruneau, M
本工作的目的在于探索解决热粘性流体中、在无界或有界介质中的声传播问题的方法。这里的焦点是边界上的热扩散和涡扩散，为了准确地描述充满流体的小空腔和管道中的声场，必须考虑这些扩散。现有的边界元或有限元声学软件不包括这些现象，因为它们与所涉及的基本方程不兼容。给出了使用该软件解决此类问题的方法，介绍了一种将数值解和解析解(针对边界层内的场)相结合的混合方法。文中给出了一个具体的应用实例，验证了边界元方法的有效性。(C)2002爱思唯尔科学有限公司。保留所有权利。
The present work aims at contributing to the investigation of methods to solve some classes of problems of acoustic propagation in thermo-viscous fluids, in unbounded or bounded media. The focus here is on thermal and vortical diffusion at the boundaries, which have to be considered for an accurate description of the acoustic field in small fluid-filled cavities and ducts. Existing boundary element or finite element acoustic software does not include these phenomena, as they are not compatible with the basic equations involved. A methodology is given to solve such problems when using this software, introducing a hybrid method which combines both numerical solutions and analytical solutions (for the fields inside the boundary layers). A detailed application is presented to validate the process using a boundary elements method. (C) 2002 Elsevier Science Ltd. All rights reserved.