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		题名	作者	年代	出处	被引量
	1	Two-phase micro-and macro-time scales in particle-laden turbulent channel flows显示文摘The micro-and macro-time scales in two-phaseturbulent channel flows are investigated using the direct numerical simulation and the Lagrangian particle trajectorymethods for the fluid-and the particle-phases,respectively.Lagrangian and Eulerian time scales of both phases are calculated using velocity correlation functions.Due to flowanisotropy,micro-time scales are not the same with the theoretical estimations in large Reynolds number(isotropic) turbulence.Lagrangian macro-time scales of particle-phaseand of fluid-phase seen by particles are both dependent onparticle Stokes number.The fluid-phase Lagrangian integral time scales increase with distance from the wall,longerthan those time scales seen by particles.The Eulerian integral macro-time scales increase in near-wall regions but decrease in out-layer regions.The moving Eulerian time scalesare also investigated and compared with Lagrangian integraltime scales,and in good agreement with previous measurements and numerical predictions.For the fluid particles themicro Eulerian time scales are longer than the Lagrangianones in the near wall regions,while away from the walls themicro Lagrangian time scales are longer.The Lagrangianintegral time scales are longer than the Eulerian ones.Theresults are useful for further understanding two-phase flowphysics and especially for constructing accurate predictionmodels of inertial particle dispersion.	Bing Wang Michael Manhart	2012	Acta Mechanica Sinica2012，28，3：	0
	2	Lagrangian time scales and its relationship to Eulerian equivalents in turbulent channel flow显示文摘Lagrangian and Eulerian time scales were obtained from the direct numerical simulation of turbulent channel flow at two Reynolds numbers based on the friction velocity and channel half-height,Reτ=80,100.The Lagrangian integral time scales and time microscales were compared to their Eulerian equivalents.It is found that the ratio of Lagrangian to Eulerian integral time scales is given by TiL/TiE=1+0.1y+ for y+≤10,and that the ratios between the Lagrangian to the Eulerian time microscales are almost the same irrespective of the components.Those increase with y+ are approximated by TiL/TiE≈ 2.75-1.75 exp '-yα+ '.These results also show that these expressions are independent of the Reynolds number.	罗剑平卢志明刘宇陆	2010	Journal of Shanghai University(English Edition)2010，14，1：	0

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