GROWTH OF ZERO-MEAN-SHEAR TURBULENT-MIXED LAYER WITH SUSPENDED PARTICLES IN A TWO-LAYER FLUID SYSTEM  

作　　者：鄂学全 王薇 

机构地区：[1]Institute of Mechanics, Academia Sinica, Beijing 100080, PRC

出　　处：《Science China Mathematics》1992年第6期709-724,共16页中国科学：数学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China.

摘　　要：The growth behaviour of zero--mean-shear turbulent--mixed layer containing suspendedsolid particles has been studied experimentally and analysed theoretically in a two-layer fluidsystem. The potential model for estimating the turbulent entrainment rate of the mixedlayer has also been suggested, including the results of the turbulent entrainment for pure two-layer fluid. The experimental results show that the entrainment behaviour of a mixedlayer with the suspended particles is well described by the model. The relationshipbetween the entrainment distance and the time, and the variation of the dimensionlessentrainment rate E with the local Richardson number Ri_1 for the suspended particles differfrom that for the pure two--layer fluid by the factors μ^(-1/5)and μ^(-1), respectively, where μ=1+σ_0Δρ/Δρ_0.The growth behaviour of zero--mean-shear turbulent--mixed layer containing suspendedsolid particles has been studied experimentally and analysed theoretically in a two-layer fluidsystem. The potential model for estimating the turbulent entrainment rate of the mixedlayer has also been suggested, including the results of the turbulent entrainment for pure two-layer fluid. The experimental results show that the entrainment behaviour of a mixedlayer with the suspended particles is well described by the model. The relationshipbetween the entrainment distance and the time, and the variation of the dimensionlessentrainment rate E with the local Richardson number Ri₁ for the suspended particles differfrom that for the pure two--layer fluid by the factors μ^-1/5and μ^-1, respectively, where μ=1+σ₀Δρ/Δρ₀.

关 键 词：STRATIFIED fluid suspended particles MIXING TURBULENT entrainment. 

分 类 号：N[自然科学总论]