2種粒径粒子並列充填層のガス流モデル

抄録

In the laminar regions, a theoretical model, which is named the cross flow model, of gas flow through parallel-packed beds with two kinds of particles is developed taking account of its axial distribution, on which basis the exact solutions on flow velocities and the pressures are derived. Effects of flow resistances through a distributor, particle size-ratios of each packed zones of the bed and a geometrical factor for the bed on flow rates and the profile and total losses of the gaseous pressure are shown.
Due to the difference among flow resistances through the distributor and each zones of parallel packed beds, lateral pressure differences and hence gas flow (i. e., cross flow) occur and those become largest just behind the distributor.
Thus, the lateral pressure difference is ordinarily limited near the boundary region between the distributor and the packed bed, although it tends to develop all through the bed as the particle size-ratio of each zones becomes larger and as the height-to-diameter ratio of the bed smaller.