チューブ型フィルタを通過する流れの理論モデル

抄録

A tube-type filter, commonly used in such as a filtration tank, is a circular filter with an inner tube. The filtrated fluid goes through the inner tube and accelerates as it flows downstream, since the filtrated fluid cumulates along the tube. Thus, the pressure inside the inner tube decreases both by the friction loss and by the flow acceleration. This pressure drop results in the non-uniformity in the permeation velocity in the filter and therefore degrades the efficiency of the filter. In this study, the flow through a tube-type filter is theoretically modeled. The goverinig equations are the conservation of mass and energy in the filter, and the permeation velocity is calculated with the loss coefficient of the filter. The result of the theoretical model shows that the non-uniformity in the permeation velocity and agrees with experimental and computational results.