2144 マイクロ蛍光 PTV を用いた表面流速の測定

抄録

This paper reports a new technique for measuring surface velocities of Marangoni convections in liquid bridges. The technique is based on the use of micro-fluorescent particles and microscopic imaging so that it can achieve spatial resolution high enough to extract velocity information from a thin velocity boundary layer near the air-liquid interface. This technique is combined with the microscopic imaging displacement meter developed by the authors for measuring dynamic surface deformations of the liquid bridge. The surface velocities measured under laminar-flow conditions compare well with those calculated numerically. Some behaviors of surface velocities under oscillatory-flow conditions are revealed experimentally for the first time.