0211 Two-dimensional measurement of the interface profile of Viscous Fingers flowing down an inclined plane

Abstract

Abstract Two-dimensional simultaneous measurement of the interface of the liquid film with a thickness of millimeter order is required for verification of a theoretical model on the development of the fingers. We measured a water film flowing down an inclined plane using color coding method, developed for the measurement of interface wave, to observe a behavior of the finger. The contact angle is largest at the tip position of the finger advancing fastest and is variable at the straight and trough position depending on a level of growth of the finger.