Problem of proper decomposition and initialization of acoustic and entropy modes in a gas affected by the mass force

Sergey Leble; Anna Perelomova

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Problem of proper decomposition and initialization of acoustic and entropy modes in a gas affected by the mass force

机译：受质量力影响的气体中声和熵模的适当分解和初始化问题

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摘要

The relations connecting perturbations specific for acoustic and entropy modes in an accelerated fluid or in a fluid affected by constant mass force, are derived. They allow to decompose the total vector of perturbations and the overall energy into acoustic and non-acoustic parts uniquely at any instant. In order to do this, three quantities are required, for example total perturbations in entropy, pressure and velocity. The evaluations are made in regard to the content of acoustic and non-acoustic parts of the total energy excluding its kinetic part. In some cases, exact relations may be derived.

机译：推导了在加速流体或受恒定质量力影响的流体中，声学和熵模所特有的扰动之间的关系。它们允许在任何瞬间将总的扰动矢量和总能量分解为唯一的声学和非声学部分。为此，需要三个量，例如熵，压力和速度的总扰动。针对总能量的声学和非声学部分的含量（不包括动力学部分）进行评估。在某些情况下，可能会得出确切的关系。

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来源
《Applied Mathematical Modelling》 |2013年第3期|629-635|共7页
作者
Sergey Leble; Anna Perelomova;
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作者单位

Gdansk University of Technology, Faculty of Applied Physics and Mathematics, ul. Narutowicza 11/12, 80-233 Gdansk, Poland;

Gdansk University of Technology, Faculty of Applied Physics and Mathematics, ul. Narutowicza 11/12, 80-233 Gdansk, Poland;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
sound propagation; non-uniform media; initialization of hydrodynamic field;

机译：声音传播;非统一媒体;流体动力场的初始化;

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1. Decomposition of Acoustic and Entropy Modes in a Non-Isothermal Gas Affected by a Mass Force [J] . Leble Sergey, Perelomova Anna Archives of acoustics . 2018,第3期

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Problem of proper decomposition and initialization of acoustic and entropy modes in a gas affected by the mass force

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