問題詳情

28.以都卜勒超音波儀量測血流(blood flow)流動狀況,紊流(turbulent flow)之臨界雷諾數(critical Reynolds number)約為多少?
(A)100
(B)500
(C)1000
(D)2000

參考答案

答案:D
難度:適中0.462264
統計:A(0),B(14),C(19),D(49),E(0)

用户評論

Tina】評論

Reynolds number=平均流速x管徑x密度/黏滯力 Critical Reynolds number≒2000~2500 in straight and smooth vessels

Eric】評論

Reynolds number=平均流速x管徑x密度/黏滯力 Critical Reynolds number≒2000~2500 in straight and smooth vessels