超音波振動印加による液体の粘性制御の検討

抄録

Many kinds of viscous liquid are used in industrial processes. Viscosity causes resistance to fluid flow. The higher the viscosity of a liquid is, the higher will viscous resistance is. Highly viscous liquid is hard to flow. Several methods are available to control the viscosity of a liquid which has many industrial applications. This study focuses on observing the change of the apparent viscosity by applying ultrasonic vibration to liquid. A bolt-clumped Langevin transducer is used as experimental apparatus. The principle of rotational viscometer is applied to measure the viscosity of the liquid. The experimental apparatus was fabricated, and several experiments were performed to observe the viscosity change of the liquid. It has been confirmed that viscosity of the liquid changes by the application of ultrasonic vibration. Furthermore, the fluid flow characteristics of Newtonian fluid and non-Newtonian fluid when ultrasonic vibration was applied were confirmed.