Transient dipolar sound wave in a viscous compressible fluid

被引：3
|
作者：
Felderhof, B. U. [1 ]
机构：
[1] Rhein Westfal TH Aachen, Inst Theoret Phys A, D-52056 Aachen, Germany
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2010年 / 389卷 / 24期
关键词：
Dipolar sound wave; Hydrodynamics; Compressible fluid; SPHERE; MOTION;
D O I：
10.1016/j.physa.2010.08.031
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dipolar sound wave generated by a sudden impulse in an unbounded viscous compressible fluid is studied on the basis of the linearized Navier-Stokes equations. Due to viscosity the spherical wavefront is diffuse with a width which grows with the square root of time. The wavefront is followed by a spherical shell of static potential flow. The shell itself surrounds an expanding spherical region of viscous flow. At long times the energy in each of the three regions is of comparable magnitude, and decays with a t(-3/2) power law. (C) 2010 Elsevier B.V. All rights reserved.
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页码：5602 / 5610
页数：9
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