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
Compact Heat Exchangers and Enhancement Technology for the Process Industries - 2003

ISBN 打印: 978-1-56700-195-2

VISCO-ELASTIC FLUID FLOW SWEEPING A CAVITY BETWEEN RECTANGULAR RIBS

Abstract

In order to investigate the optimum geometric condition for a heat transfer augmentation technique using fluid visco-elasticity, flow visualization experiments have been performed in a cavity between rectangular ribs mounted on one side wall of an open channel. Rib height and cavity size (the distance between ribs) channel flow with ribs on one side wall are changed in several steps while the rib length and the mean velocity at narrow cross-sections were kept constant. As viscoelastic fluid, dilute cationic surfactant solution of oleylbishydroxyethylmethylanmonium chloride was use. The rheological characteristics of the fluid were also measured for analyzing flow phenomena. From the results, the case having small rib height and large cavity size is found to have an advantage for minimizing a recirculating region formed in the downstream region. With the features of the first normal difference and apparent viscosity of the fluid, the size of the recirculating region is found to be proportional to the square value of the reciprocal of contraction ratio.
首页 Begell 数字门户 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