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Water at 20°C is flowing over a 2 m long flat plate at a velocity of 0.2 m/s. Determine the thermal boundary layer thickness at the end of the plate (v=1.004 x 10^-6m^2/s, Pr=7.01) a. 8.13 mm b. 10.97 mm c. 14.88 mm d. 17.21 mm

Respuesta :

Answer:

option is C

Explanation:

we know that reynold number is given [tex]Re = \frac{vD}{\nu}[/tex]

[tex]Re = \frac{0.2*2}{1.004*10^{-6}} = 398406.37[/tex] WHICH IS LESS THAN

5*10^5

therefore flow is laminar

velocity distribution is parabolic

[tex]\delta = \frac{4.64x}{\sqrt Re_x}[/tex]

[tex]\delta = \frac{4.64*2000}{\sqrt {398406.37}} = 14.7 mm[/tex]

nearest option is C

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