CONTAMINANT CONTRACTION IN TWO-DIMENSIONAL OSCILLATORY FLOWS

被引：0
|
作者：
刘宇陆
蔡树棠
机构：
[1] Shanghai Univ. of Tech., Shanghai ,Shanghai Inst. of Appl. Math, and Mech.
[2] Shanghai Inst. of Appl. Math, and Mech.
来源：
AppliedMathematicsandMechanics(EnglishEdition) | 1993年 / 11期
关键词：
shear dispersion; oscillatory flow; memory function; contaminant contraction;
D O I：
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摘要：
If the vertically-mixing time is comparable with that of period oscillatory current,the contaminant contraction may occur.The coefficient of shear dispersion is negative(singularity).According to the two-dimensional delay-diffusion equation derived by theauthor:where u(t),v(t)are vertically-averaged velocities,the equations for X(t),Y(t),central displacement,dispersion tensor,had been derived.αD/τis positivewhenτis small.If theτis large,the memory functions may be negative.Also theexpressions for Dand X,Y had been obtained.
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页码：1003 / 1012
页数：10
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