正方形断面曲がり管内における界面活性剤水溶液の二次流れに関する研究(S23-2 複雑流体の流れとその応用(2),S23 複雑流体の流れとその応用)

概要

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Surfactant solution for drag-reducing has non-Newtonian property with is shear-thinning viscosity. In this study, secondary flow of the surfactant solution in a 90° square bend is investigated by using PIV. The flow in bulk velocity V_b = 2.0m/s has the drag-reducing rate of 26% in the bend: The radial velocity component, V_y, is integrated over a given volume in order to estimate the magnitude of secondary flow. It is shown that the V_y component of secondary flow in the surfactant solution is greater upstream in the bend than that in water, and smaller downstream. In the whole region of the bend, the magnitude in the surfactant solution is smaller than that in water.
社団法人日本機械学会の論文
2004-09-04