1518 界面活性剤溶液変動場の発達様式

概要

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Development behavior of fluctuating velocity of surfactant solution in a duct has been studied experimentally. The concentration of surfactants was kept constant at 1,000ppm, mean velocity at 0.78m/s and fluid temperature at 15℃. Using LDV, the fluctuating streamwise velocity distributions at six cross-sections, which are ranged from 28 to 112 times of hydraulic diameter of the duct, were measured. From the results, the fluctuating structures of surfactant solution flow are observed to have the different structures from that of turbulent water flow in the developing field. The wavelet analysis reveals the fluctuation of surfactant solution flow is characterized by periodicity rather than irregularity around the position where the fluctuation intensity takes a peak value. The size of fluctuation structures is also found to become small in the near wall region below the peak, because the viscosity field is developing near the wall.
一般社団法人日本機械学会の論文
2003-08-05