S056024 急縮小部を有するマイクロチャネル内の種々の水溶液の流動特性([S05602]複雑流体の流動現象(2))

概要

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We have investigated flow properties of polymer solutions in asymmetric micro slot channels with an abrupt contraction. Pressure drops in the micro slot die flows were measured and the width of the slots in the micro channels was changed to clarify the influence of two or three dimensionality of contraction inlet flows. Polyethylene oxide (PEO) 100ppm solution was tested as a polymer solution and the results were compared with those of water. The PEO solution shows two step jumps in pressure drop. First increases in pressure drop due to generation of vortexes occurred at nearly the same Reynolds number regardless of the inlet flow dimensionality. But the Reynolds number at the second jump in the pressure drop was affected with the two or three dimensionality of the inlet flow. Moreover, ratio of increase in pressure drop of the polymer solution to those of water was higher in the case of the three dimensional inlet flows.
一般社団法人日本機械学会の論文
2011-09-11