a) Estimate the drag force on the plate. You may use the expression ?? = ∫ τ?d?b) When the flow becomes turbulent, we can approximate the velocity gradient at the wall as constant, ∂? ∂? = ?. If the total drag force is 300 N, find ?.c) When the fluid is heated to 90oC, the density drops slightly and the viscosity decreases a lot, and engineers observe that the equation, τ? = 0.0644??∞ 2 δ ? , becomes less accurate. Explain why this might occur (1-2 sentences) Water flows past a flat plate that has a length L = 5 m and a width w = 2 m, as shown inFigure Q4. The shear stress at the wall is given by Tw=H. When the flow is laminar theshear stress at the wall is given by the equation:8Tw = 0.0644 pU²-Where p = 1000 kg/m³ is the water density and U∞ = 5 m/s is the velocity of the water.The height of the boundary layer is 8, and can be approximated by8(x) = 5The viscosity of water is μ = 1 mPa.s.μχpU... UL8(x)Figure Q4: Flow over a long flat plate. The boundary layer is shown by the light grey.

Given Data: Water flows past a flat plate Plate Length L=5 m Plate Width w=2 m shear stress at the…

Answered: a) Estimate the drag force on the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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a) Estimate the drag force on the plate. You may use the expression ?? = ∫ τ?d?

b) When the flow becomes turbulent, we can approximate the velocity gradient at the wall as constant, ∂? ∂? = ?. If the total drag force is 300 N, find ?.

c) When the fluid is heated to 90oC, the density drops slightly and the viscosity decreases a lot, and engineers observe that the equation, τ? = 0.0644??∞ 2 δ ? , becomes less accurate. Explain why this might occur (1-2 sentences)

Water flows past a flat plate that has a length L = 5 m and a width w = 2 m, as shown in
Figure Q4. The shear stress at the wall is given by Tw=H. When the flow is laminar the
shear stress at the wall is given by the equation:
8
Tw = 0.0644 pU²-
Where p = 1000 kg/m³ is the water density and U∞ = 5 m/s is the velocity of the water.
The height of the boundary layer is 8, and can be approximated by
8(x) = 5
The viscosity of water is μ = 1 mPa.s.
μχ
pU...

U
L
8(x)
Figure Q4: Flow over a long flat plate. The boundary layer is shown by the light grey.

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