在一个大质量物体的场中由自身重力引起的粘性。

IF 2.4 3区 物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS
Ilia Yu Kalashnikov, Valery M Chechetkin
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引用次数: 0

摘要

本研究探讨了存在大质量中心体的无碰撞系统中自重力诱导的粘性。利用基于Vlasov-Poisson方程的动力学框架,我们推导了自引力相互作用引起的粘性的解析表达式。发现自重介质在外加引力场中表现出非牛顿流体的各向异性特性。分析强调了自重力如何改变流体动力学过程,特别是在驱动角动量损失方面。这些发现促进了我们对无碰撞环境中集体引力效应的理解,为暗物质动力学建模、星系结构形成和自引力吸积流的演化提供了潜在的启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Viscosity caused by self-gravity in the field of a massive body.

This study investigates self-gravity-induced viscosity in collisionless systems in the presence of a massive central body. Employing a kinetic framework based on the Vlasov-Poisson equations, we derive an analytical expression for viscosity arising from self-gravitational interactions. It is found that a self-gravitating medium in an external gravitational field exhibits non-Newtonian fluid behavior with anisotropic properties. The analysis emphasizes how self-gravity modifies hydrodynamic processes, particularly in driving the loss of angular momentum. These findings advance our understanding of collective gravitational effects in collisionless environments, offering potential implications for modeling dark matter dynamics, galactic structure formation, and the evolution of self-gravitating accretion flows.

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来源期刊
Physical Review E
Physical Review E PHYSICS, FLUIDS & PLASMASPHYSICS, MATHEMAT-PHYSICS, MATHEMATICAL
CiteScore
4.50
自引率
16.70%
发文量
2110
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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