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mel-nik [20]
3 years ago
10

A crude but useful approximation for an incompressible boundary layer is a cubic variation from u = 0 at the surface (y = δ) to

the freestream velocity, U, at the edge of the boundary layer (y = 0). The equation for the profile is u/U = 3/2(y/δ) – 1/2(y/δ)3, where δ = cx1/2 and c is a constant. Derive the simplest expression for v/U, the y component of velocity ratio. Determine the y/δ location for the maximum value of the ratio v/U. Determine v/U for y = 1 mm, δ = 5 mm and x = 0.87 m. Determine vmax/U for δ = 5 mm and x = 0.87 m.

Physics
1 answer:
Vinvika [58]3 years ago
7 0

Answer:

Explanation:

The detailed steps and appropriate differentiation and integration is as shown in the attachment.

Starting from the equation for the profile is u/U = 3/2(y/δ) – 1/2(y/δ)3

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What are applications of zeroth law of thermodynamics?​
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Answer:

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Points a and b lie in a region where the y-component of the electric field is Ey=α+β/y2. The constants in this expression have t
Drupady [299]

Answer:

V_{a} - V_{b} = 89.3

Explanation:

The electric potential is defined by

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         V_{b} - V_{a} = - ∫ E ds

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We integrate

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We evaluate between the lower limit A  2 cm = 0.02 m and the upper limit B 3 cm = 0.03 m

           V_{b} - V_{a} = - α (0.03 - 0.02) + β (1 / 0.03 - 1 / 0.02)

            V_{b} - V_{a} = - 600 0.01 + 5 (-16.67) = -6 - 83.33

            V_{b} - V_{a} = - 89.3 V

As they ask us the reverse case

             V_{b} - V_{a} = - V_{b} - V_{a}

             V_{a} - V_{b} = 89.3

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