When a fluid flows over a surface, the shear stresS I (N/m) at the surface is given by the expression du T = - 'dy surface where u is the viscosity (N-s/m), u is the velocity parallel to the surface (m/s), and y is the distance normal to the surface (cm). Measurements of the velocity of an air stream flowing above a surface are made with an LDV (laser-Doppler-Velocimeter). The values given below were obtained. y y 0.0 0.00 2.0 88.89 1.0 55.56 3.0 100.00 At the local temperature, u = 0.00024 N-s/m. In four decimal places, calculate du/dy at the surface using all the points.

When a fluid flows over a surface, the shear stresS I (N/m) at the surface is given by the expression du T = - 'dy surface where u is the viscosity (N-s/m), u is the velocity parallel to the surface (m/s), and y is the distance normal to the surface (cm). Measurements of the velocity of an air stream flowing above a surface are made with an LDV (laser-Doppler-Velocimeter). The values given below were obtained. y y 0.0 0.00 2.0 88.89 1.0 55.56 3.0 100.00 At the local temperature, u = 0.00024 N-s/m. In four decimal places, calculate du/dy at the surface using all the points.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

When a fluid flows over a surface, the shear stresS I (N/m) at the surface is given by the expression
du
dy
surface
where u is the viscosity (N-s/m), u is the velocity parallel to the surface (m/s), and y is the distance normal to the surface (cm). Measurements of the velocity of an
air stream flowing above a surface are made with an LDV (laser-Doppler-Velocimeter). The values given below were obtained.
y
u
y
и
0.0
0.00
2.0
88.89
1.0
55.56
3.0
100.00
At the local temperature, u = 0.00024 N-s/m. In four decimal places, calculate du/dy at the surface using all the points.

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