教師資料查詢 | 類別: 期刊論文 | 教師: 盧博堅 LU PO-CHIEN (瀏覽個人網頁)

標題:Reynolds shear stresses in pulsatile jet flows
學年88
學期1
出版(發表)日期2000/01/01
作品名稱Reynolds shear stresses in pulsatile jet flows
作品名稱(其他語言)
著者Lu, Po-chien; Lia, Ho-cheng; Liu, Jia-Shing
單位淡江大學水資源及環境工程學系
出版者Singapore: World Scientific Publishing Co. Pte. Ltd.
著錄名稱、卷期、頁數Biomedical engineering: applications basis communications 12(5), pp.223-229
摘要In this study a simple pulsatile jer flow with two separate pulse frequencies of 1.33 Hz and 2.0 Hz, which respectively correspond to heart rates of 80 and 120 beats per minute under physiological conditions, was used to measure the major principal Reynolds shear stress and turbulence length scales in the flow. Although the Reynolds numbers during the peak phases of the pulsatile flows, namely Re = 55800 and 58400, are apparently larger than those of steady flows with Re = 22000, 28500, and 35000 [1], the maximum major principal Reynolds shear stress values measured during the peak phases of the pulsatile flows are significantly smaller. A value of 0.0065 was obtained in this study, while 0.0093 was measured in the steady flows, differing by approximately 40%. On the other hand, the turbulence length scales in both kinds of flow fields are relatively similar. This shows that using a steady jet flow to represent the peak phase of pulsatile flow while studying artificial prosthe ses could cause an overestimation of the turbulence stress values.
關鍵字
語言英文
ISSN1016-2372;1793-7132
期刊性質國外
收錄於EI
產學合作
通訊作者
審稿制度
國別新加坡
公開徵稿
出版型式紙本
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