問題詳情
44、 The boundary layer flow over a flat plate with zero pressure gradients is shown in Figure 44.The control volume is defined as dashed line a-b-c-d and the depth is defined as w. Ahead ofthe plate the velocity is uniform, U. The velocity distribution across cd is approximated by
, here δ(x) denotes the boundary layer thickness. Which of thefollowing statements is correct?
(A) the mass flux across bc equals
/5,
(B) the mass flux across ab equals -
,
(C) the mass flux across cd equals2
/3 ,
(D) the mass flux across bc equals
/3.
參考答案
答案:B,C,D
難度:非常困難0
統計:A(0),B(0),C(0),D(0),E(0)