Sound waves propagating in a slightly rarefied gas over a smooth solid boundary
Sound waves propagating in a slightly rarefied gas over a smooth solid boundary
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声波在稍微稀薄的气体中在光滑的固体边界上传播
DOI:
10.1103/physrevfluids.4.103401
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发表时间:
2019
影响因子:
2.7
通讯作者:
M. Hattori and S. Takata
中科院分区:
文献类型:
--
作者:
三國裕子;藤澤珠織;M. Hattori and S. Takata
A time-evolution of a slightly rarefied gas from a uniform equilibrium state at rest is investigated on the basis of the linearized Boltzmann equation under the acoustic time scaling. By a systematic asymptotic analysis, linearized Euler sets of equations and acoustic-boundary-layer equations are derived, together with their slip and jump boundary conditions, as well as the correction formula in the Knudsen layer. Analysis is done up to the first order of the Knudsen number (), withbeing the small parameter. Several rarefaction effects, which are known as the effects of the second order inin the diffusion scaling, are enhanced to be of the first order in. This is because the variation of the macroscopic quantities along the normal direction is steep in the boundary layer and the compressibility of the gas is comparatively strong. The occurrence of secular terms associated with the Hilbert expansion is pointed out and a remedy for it is also given. Finally, as an application example, a sound propagation in a half space caused by a sinusoidal oscillation of flat boundary is examined on the basis of the Bhatnagar–Gross–Krook equation. The asymptotic solution agrees well with the direct numerical solution.
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影响因子:
2.4
作者:
H. Tsien;R. Schamberg
通讯作者:
R. Schamberg
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
S. Loyalka;T. C. Cheng
通讯作者:
T. C. Cheng
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
R. Garcia;C. Siewert
通讯作者:
C. Siewert
影响因子:
4.6
作者:
A. Manela;G. Radtke;L. Pogorelyuk
通讯作者:
L. Pogorelyuk
DOI:
--
发表时间:
1957
期刊:
影响因子:
--
作者:
E. Meyer;G. Seßler
通讯作者:
G. Seßler