Correlation Function of Equilibrium Thermal Pressure Fluctuations in Viscous Heat-Conducting Gas

IF 1.2 4区物理与天体物理 Q4 ACOUSTICS

Acoustical Physics Pub Date : 2025-08-18 DOI:10.1134/S1063771024603108

M. A. Demyanov, V. F. Kopiev, M. A. Yudin

引用次数: 0

Abstract

The problem of finding the spatiotemporal correlation function of pressure thermal fluctuations of gas near thermodynamic equilibrium is considered. The correlation function of pressure field equilibrium thermal fluctuations is obtained for viscous heat-conducting perfect gas filling an unbounded Euclidean space. The influence of the boundary on the correlation characteristics of thermal fluctuations of pressure is investigated using the example of a viscous isentropic perfect gas filling a small-section pipe with boundary conditions of a solid wall at the ends and periodic conditions for the case of a pipe closed in a circle.

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粘性导热气体平衡热压波动的相关函数

考虑了气体在热力学平衡附近压力热波动的时空相关函数的求解问题。得到了粘性导热完美气体填充无界欧几里得空间时压力场平衡热波动的相关函数。以粘滞等熵理想气体填充小截面管道为例，研究了边界对压力热波动相关特性的影响，边界条件为端部为固体壁，边界条件为管道封闭成圆形时的周期条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acoustical Physics 物理-声学

CiteScore

1.60

自引率

50.00%

发文量

审稿时长

3.5 months

期刊介绍： Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.