血液透析回路の返血側チャンバー内グリセリン水溶液流れに対する流入角度の影響の数値解析

抄録

In this study, the flows of aqueous glycerin solution in a venous chamber are numerically investigated. Inflow types for commercially available venous chambers are mostly limited to horizontal and vertical types, and there seems to be no venous chambers which the fluid flows into at an angle. In this study, we performed a set of LES simulations to evaluate the effect of inflow angle on the flow field in the venous chamber, where the following three inflow angles are chosen: horizontal (0°), 45°-downward, and 45°-upward. Results are shown in terms of streamlines, mean velocity, and turbulence statistics. It was found from the results that the magnitude of velocity for the 45°-downward case was the largest in the lower half of the chamber compared to those for the horizontal (0°) and 45°-upward cases. Also, the axial turbulence intensity for the 45°-downward case are relatively larger than the other cases in mostly entire region in the chamber.