请登录 0 购物车
首页 图书 电子图书 期刊 参考文献及会议录 作者,编辑,审稿 A-Z 产品目录
Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN 打印: 1-56700-135-1

VISUALIZATION AND ANALYSIS OF BOUNDARY LAYER FLOW IN LIVE AND ROBOTIC FISH

Abstract

Near wall flow over both live and robotic fish was visualized using a pulsed laser sheet and a high-resolution digital video camera. Velocities of particles illuminated by the laser sheet were determined by particle tracking, PTV. Particles very close to the fish surface, y < 1 mm were tracked semi-automatically, while those further away were tracked automatically using a particle finding and matching algorithm. Standard cross-correlation DPIV (digital particle imaging velocimetry) was also used as a crosscheck. The outline of the fish surface was fit with an appropriate spine so that u and ν velocity profiles could be constructed with respect to the curved fish surface. The technique allowed for the resolution of the viscous sublayer. The boundary layer flow over live and robotic fish was not always easily categorized as laminar or turbulent when compared to accepted flat plate profiles. Deviations from flat plate theory are not surprising, however, considering the waving motion of the fish surface. Resolution of the fish boundary layer is an essential part of examining possible drag reducing techniques involving the manipulation of near wall flow.
首页 Begell Digital Portal Begell数据库 期刊 图书 电子图书 参考文献及会议录 作者,编辑,审稿 A-Z 产品目录 订购及政策 关于BegellHouse 联系我们 Language English 中文 Русский 日本語 Português Deutsch Français Español