摘要翻译:
研究了旋转球体上正压流动的低阶等时统计量。流动是由向不稳定纬向射流的线性松弛驱动的。对于相对较短的弛豫时间,流动以临界层波为主。在足够长的松弛时间内,流动是湍流的。将二阶累积量展开的统计量与直接数值模拟中积累的统计量进行了比较,揭示了在不同松弛时间下展开的优点和局限性。
---
英文标题:
《Statistics of an Unstable Barotropic Jet from a Cumulant Expansion》
---
作者:
J. B. Marston, E. Conover, and Tapio Schneider
---
最新提交年份:
2007
---
分类信息:
一级分类:Physics 物理学
二级分类:Fluid Dynamics 流体动力学
分类描述:Turbulence, instabilities, incompressible/compressible flows, reacting flows. Aero/hydrodynamics, fluid-structure interactions, acoustics. Biological fluid dynamics, micro/nanofluidics, interfacial phenomena. Complex fluids, suspensions and granular flows, porous media flows. Geophysical flows, thermoconvective and stratified flows. Mathematical and computational methods for fluid dynamics, fluid flow models, experimental techniques.
湍流,不稳定性,不可压缩/可压缩流,反应流。气动/流体力学,流体-结构相互作用,声学。生物流体力学,微/纳米流体力学,界面现象。复杂流体,悬浮液和颗粒流,多孔介质流。地球物理流,热对流和层流。流体动力学的数学和计算方法,流体流动模型,实验技术。
--
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
--
一级分类:Physics 物理学
二级分类:Chaotic Dynamics 混沌动力学
分类描述:Dynamical systems, chaos, quantum chaos, topological dynamics, cycle expansions, turbulence, propagation
动力系统,混沌,量子混沌,拓扑动力学,循环展开,湍流,传播
--
一级分类:Physics 物理学
二级分类:Atmospheric and Oceanic Physics 大气与海洋物理
分类描述:Atmospheric and oceanic physics and physical chemistry, biogeophysics, and climate science
大气和海洋物理和物理化学,生物地球物理和气候科学
--
一级分类:Physics 物理学
二级分类:Computational Physics 计算物理学
分类描述:All aspects of computational science applied to physics.
应用于物理学的计算科学的各个方面。
--
---
英文摘要:
Low-order equal-time statistics of a barotropic flow on a rotating sphere are investigated. The flow is driven by linear relaxation toward an unstable zonal jet. For relatively short relaxation times, the flow is dominated by critical-layer waves. For sufficiently long relaxation times, the flow is turbulent. Statistics obtained from a second-order cumulant expansion are compared to those accumulated in direct numerical simulations, revealing the strengths and limitations of the expansion for different relaxation times.
---
PDF链接:
https://arxiv.org/pdf/705.0011