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.…

Question

asked Apr 15, 2020 127k views

1 Answer

DataPsycho · Answer 1 · 2020-04-21T13:15:09+0000

Answer:

option is C

Step-by-step explanation:

we know that reynold number is given
$Re = (vD)/(\\u)$

Re = (0.2*2)/(1.004*10^(-6)) = 398406.37 WHICH IS LESS THAN

5*10^5

therefore flow is laminar

velocity distribution is parabolic

$\delta = (4.64x)/(\sqrt Re_x)$

$\delta = \frac{4.64*2000}{\sqrt {398406.37}} = 14.7 mm$

nearest option is C