{"title":"Characteristics of Wake Flows behind a Diamond-shaped Cylinder","authors":"S. Umeda, Wen‐Jei Yang, Hidetomo Kanbara","doi":"10.3154/TVSJ.21.58","DOIUrl":null,"url":null,"abstract":"The turbulence flow around a square or diamond-shaped cylinder has received far less attention than the flow around a circular cylinder. An experimental study was performed to visualize the wake flows behind a diamond-shaped cylinder. Several kinds of aspect ratios d/w and b/w were selected in the experiment, where w was a width of the cylinder, d and b were a depth and width of the duct, respectively. The wake flows were visualized at a top view, a side view and rear views using the fluores-cein dye illuminated by a laser light sheet. The velocity variations in the flow field were measured using two-dimensional laser Doppler velocimetry. It is shown that the three dimensional longitudinal vortices appear in the wake flows behind the diamond-shaped cylinder. The characteristics of the turbulence in the wake flows behind it are clarified.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"72 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transaction of The Visualization Society of Japan","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3154/TVSJ.21.58","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
The turbulence flow around a square or diamond-shaped cylinder has received far less attention than the flow around a circular cylinder. An experimental study was performed to visualize the wake flows behind a diamond-shaped cylinder. Several kinds of aspect ratios d/w and b/w were selected in the experiment, where w was a width of the cylinder, d and b were a depth and width of the duct, respectively. The wake flows were visualized at a top view, a side view and rear views using the fluores-cein dye illuminated by a laser light sheet. The velocity variations in the flow field were measured using two-dimensional laser Doppler velocimetry. It is shown that the three dimensional longitudinal vortices appear in the wake flows behind the diamond-shaped cylinder. The characteristics of the turbulence in the wake flows behind it are clarified.