NUMERICAL SIMULATION OF FLOW WITH FLEXIBLE VEGETATION BY PARTICLE METHOD

Abstract

In dense vegetation, which is bent and swung by a flow because of its flexible structure, organized motion which is so-called honami can be seen. Flow field with vegetation layer is characterized by an eddy due to flow instability which brings velocity profile with an inflection point around the top of vegetation layer. A time-dependent and spatial change of vegetation density due to phase difference of swing motion of vegetation is known as one of the major characteristics of flow with flexible vegitation. In this study, the particle method is applied to analyse a flow with flexible vegitation with developing new model of flexible vegetation by introducing one-dimensional elastic body model.