Turbulent flow over and within a porous bed

被引：72

作者：

Prinos, P ^{[1
]}

Sofialidis, D

Keramaris, E

机构：

[1] Aristotle Univ Thessaloniki, Dept Civil Engn, Hydraul Lab, Thessaloniki 54124, Greece

[2] SimTec Ltd, Thessaloniki 54622, Greece

来源：

JOURNAL OF HYDRAULIC ENGINEERING | 2003年 / 129卷 / 09期

关键词：

D O I：

10.1061/(ASCE)0733-9429(2003)129:9(720)

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

velocities and turbulent stresses are measured for ( phi = 0.8286 using hot-film anemometry. Emphasis is given to the effect of Darcy number Da on the flow properties over and within the porous region. Computed and experimental velocities in the free flow are shown to decrease with increasing Da due to the strong momentum exchange near the porous medium/free flow interface and the corresponding penetration of turbulence into the porous layer for highly permeable beds. Computed discharge indicates the significant reduction of the channel capacity, compared to the situation with an impermeable bed. On the contrary, laminar flow computations, along with analytical, solutions and measurements. indicate opposite effects of the porous medium on the free flow.

引用

页码：720 / 733

页数：14

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