各向同性可压缩粘性多流体一维运动的初始边界值问题解的渐近行为

IF 0.8 Q2 MATHEMATICS Lobachevskii Journal of Mathematics Pub Date : 2024-08-22 DOI:10.1134/s1995080224601218
A. E. Mamontov, D. A. Prokudin
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引用次数: 0

摘要

摘要 研究了可压缩粘性多组分介质的一维气压方程的初始边界值问题,该方程是单组分可压缩粘性流体动力学纳维-斯托克斯方程的一般化。在所考虑的方程中,由于粘性应力张量的复合结构,所有组分速度的高阶导数都存在。与粘度为标量的单组分情况不同,在多组分情况下,粘度构成了一个矩阵,其条目描述了粘性摩擦。对角线条目描述的是每个分量内部的粘性摩擦,非对角线条目描述的是分量之间的摩擦。这一事实使得纳维-斯托克斯方程的已知结果无法自动转移到多组分情况中。在对角粘度矩阵的情况下,动量方程可能只通过低阶项相连。本文考虑的是更复杂的非对角(填充)粘度矩阵情况。除了对称性和正定性等标准物理要求外,本文无需对粘滞矩阵的结构进行简化假设,就能证明无约束时间增长的初界值问题解的稳定性。
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Asymptotic Behavior of the Solution to the Initial-boundary Value Problem for One-dimensional Motions of a Barotropic Compressible Viscous Multifluid

Abstract

An initial-boundary value problem is considered for one-dimensional barotropic equations of compressible viscous multicomponent media, which are a generalization of the Navier–Stokes equations of the dynamics of a single-component compressible viscous fluid. In the equations under consideration, higher order derivatives of the velocities of all components are present due to the composite structure of the viscous stress tensors. Unlike the single-component case in which the viscosities are scalars, in the multicomponent case they form a matrix whose entries describe viscous friction. Diagonal entries describe viscous friction within each component, and non-diagonal entries describe friction between the components. This fact does not allow to automatically transfer the known results for the Navier–Stokes equations to the multicomponent case. In the case of a diagonal viscosity matrix, the momentum equations are possibly connected via the lower order terms only. In the paper the more complicated case of an off-diagonal (filled) viscosity matrix is under consideration. The stabilization of the solution to the initial-boundary value problem with unbounded time increase is proved without simplifying assumptions on the structure of the viscosity matrix, except for the standard physical requirements of symmetry and positive definiteness.

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来源期刊
CiteScore
1.50
自引率
42.90%
发文量
127
期刊介绍: Lobachevskii Journal of Mathematics is an international peer reviewed journal published in collaboration with the Russian Academy of Sciences and Kazan Federal University. The journal covers mathematical topics associated with the name of famous Russian mathematician Nikolai Lobachevsky (Lobachevskii). The journal publishes research articles on geometry and topology, algebra, complex analysis, functional analysis, differential equations and mathematical physics, probability theory and stochastic processes, computational mathematics, mathematical modeling, numerical methods and program complexes, computer science, optimal control, and theory of algorithms as well as applied mathematics. The journal welcomes manuscripts from all countries in the English language.
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