Air flows over a plate at a particular velocity from left to right. The velocity and boundary layer thickness can be expressed by the following two expressions. U Зу 1 1 у. %3D - 28 2 4.64x VRex where x is the distance measured from the left end of the plate, y is the height above the plate, & is the boundary layer thickness, U. is the free stream velocity and Rex is Reynolds number at a distance x from left end. Calculate the shear stress at x 1 m, taking the free stream velocity of air to be 2 m s', the kinematic viscosity of air to be 1.5 x 10-5 m? s1 and density of air to be 1.23 kg m3
Air flows over a plate at a particular velocity from left to right. The velocity and boundary layer thickness can be expressed by the following two expressions. U Зу 1 1 у. %3D - 28 2 4.64x VRex where x is the distance measured from the left end of the plate, y is the height above the plate, & is the boundary layer thickness, U. is the free stream velocity and Rex is Reynolds number at a distance x from left end. Calculate the shear stress at x 1 m, taking the free stream velocity of air to be 2 m s', the kinematic viscosity of air to be 1.5 x 10-5 m? s1 and density of air to be 1.23 kg m3
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:10. Air flows over a plate at a particular velocity from left to right. The velocity and
boundary layer thickness can be expressed by the following two expressions.
Зу 1 у.
2 8
U
28
4.64x
%3D
VRex
where x is the distance measured from the left end of the plate, y is the height above
the plate, & is the boundary layer thickness, U. is the free stream velocity and Rex is
Reynolds number at a distance x from left end. Calculate the shear stress at x = 1 m,
taking the free stream velocity of air to be 2 m s-1, the kinematic viscosity of air to be
1.5 x 10-5 m2 s1 and density of air to be 1.23 kg m-3
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