填料床渗流计算的二元模型

基于多重介质理论,建立了填料床二元渗流计算模型,认为填料床的渗流具有二元性质:其一,水通过多孔材料颗粒之间的分析流动,渗流通畅,流速较大;其二,水通过多孔材料颗粒内的孔隙渗流,渗流不甚通畅,流速较慢。二元模型描述了这种差别,并得出了通过二者渗流流量的比值。认为多孔材料的孔隙率大于0.6时,通过多孔材料的流量占总流量的比例接近30%。

A dual seepage computation model for porous medium filling bed

A dual seepage computation model was proposed on the basis of multi-media seepage theory in a porous medium filling bed for water pollution modification.In which,the dual seepage characteristics was depicted.the one side was that water flows through interstices among porous balls,in which water flows quick and smoothly.And the other side was that water seeps from holes in porous balls,in which water seeps slow and being obstructed.By the dual seepage computation model,the flux could be worked out.It was being deduced that the ratio between flux via interstices in porous balls and the total flux was close to 30 percent as the permeability ratio was 0.6.