微小管内流れにおける種々の希薄高分子水溶液の擬層流化現象

抄録

Pressure drops were measured with constant flow rates because flow properties of dilute aqueous solutions of polymers passing through capillaries, which diameter ranged from 125 μm to 680 μm, were investigated. Good agreement between the resultant pressure drops for water and the predicted ones for laminar flow and Blasius expression was obtained even though small-sized capillaries were used. On the other hand, laminar flows were maintained in transition region by using dilute polymer solutions. Pseudo-laminarization of dilute polymer solution was thus obtained. Furthermore, we discussed relationship between the phenomena and their elastic properties.