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	Improved subgrid scale model for dense turbulent solid-liquid two-phase flows
	Tang Xuelin ; Qian Zhongdong ; Wu Yulin
	2010-05-11 ; 2010-05-11
关键词	Theoretical or Mathematical/ computational fluid dynamics confined flow kinetic theory Maxwell equations slip flow turbulence two-phase flow/ dense solid-phase governing equations kinetic theory gas molecules solid-phase velocity distributions Maxwell equations dilute two-phase flow solid-particle governing equations Cauchy-Helmholtz theorem Smagorinsky model second-order dynamic subgrid-scale model subgrid-scale stress strain-rate tensor rotation-rate tensor SIMPLEC algorithm grid system slip boundary conditions velocity field pressure field volumetric concentration rectangular cross-section dense turbulent solid-liquid two-phase flows/ A4755K Multiphase flows A4725 Turbulent flows, convection, and heat transfer A4710 General fluid dynamics theory, simulation and other computational methods A4745G Slip flows A4725F Boundary layer and shear turbulence A4760 Flows in ducts, channels, and conduits
中文摘要	The dense solid-phase governing equations for two-phase flows are obtained by using the kinetic theory of gas molecules. Assuming that the solid-phase velocity distributions obey the Maxwell equations, the collision term for particles under dense two-phase flow conditions is also derived. In comparison with the governing equations of a dilute two-phase flow, the solid-particle's governing equations are developed for a dense turbulent solid-liquid flow by adopting some relevant terms from the dilute two-phase governing equations. Based on Cauchy-Helmholtz theorem and Smagorinsky model, a second-order dynamic subgrid-scale (SGS) model, in which the subgrid-scale stress is a function of both the strain-rate tensor and the rotation-rate tensor, is proposed to model the two-phase governing equations by applying dimension analyses. Applying the SIMPLEC algorithm and staggering grid system to the two-phase discretized governing equations and employing the slip boundary conditions on the walls, the velocity and pressure fields, and the volumetric concentration are calculated. The simulation results are in a fairly good agreement with experimental data in two operating cases in a conduit with a rectangular cross-section and these comparisons imply that these models are practical.
语种	英语 ; 英语
出版者	Chinese J. Mech. Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27456]
专题	清华大学
推荐引用方式 GB/T 7714	Tang Xuelin,Qian Zhongdong,Wu Yulin. Improved subgrid scale model for dense turbulent solid-liquid two-phase flows[J],2010, 2010.
APA	Tang Xuelin,Qian Zhongdong,&Wu Yulin.(2010).Improved subgrid scale model for dense turbulent solid-liquid two-phase flows..
MLA	Tang Xuelin,et al."Improved subgrid scale model for dense turbulent solid-liquid two-phase flows".(2010).

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