細管内液液スラグ流の流動様式に及ぼす物性値の影響

抄録

The characteristics of water-silicon oil two-phase flow in a microchannel with a rectangular cross section of 1.0 mm height × 1.0 mm width were experimentally investigated. In order to understand the effects of fluid viscosity and channel wall wettability on slug flow in a microchannel, the viscosity of the continuous phase was changed and the channel walls near the fluid mixing zone were coated with a water repellent. The contact angles were approximately 108° and for the non-coating surface and 140° for the coating one. In the experiments, droplet length, droplet velocity, number of slugs passed and pressure drop were measured. It was found that, the droplet length decreased with coating water repellent and with increasing viscosity of the continuous phase. The pressure drop was affected by the viscosity of the continuous phase.