Hydrodynamic Test on Porous Media Coupled Action of Seepage tangential Flow

Abstract:

A special setup was developed to observe the coupled effects of seepage and tangential flow. Experimental hydrodynamic analysis was performed on the boundary layer of permeable beds subjected to bed normal seepage. The bed is made up of uniform sized spheres. The hydrodynamic influences of flow depth and seepage intensity on the flow structure in the pores of the permeable bed were analyzed. The results indicate that the hydrodynamic pressure and turbulence intensity in the pores are much smaller than in the tangential flow above the bed. The results also show that the seepage intensity has positive correlation with outward seepage rate from the pores. The flow turbulence intensity and hydrodynamic pressure in pores descends with the increasing of depth, and the descending rate gets down as well. The influence of different seepage conditions on transverse hydrodynamic pressure is not obvious.