for air: specific gas constant R'= R/M= 287J/kg.K
thank you
$Example 1: Air at $ 27^{\circ} \mathrm{C} $ and $ 1 \mathrm{~atm} $ flows over a flat plate at a speed of \( 2 \mathrm{~m$

Example 1: Air at $2 7^{?} C$ and $1 atm$ flows over a flat plate at a speed of $2 m / s$ . Calculate the hydrodynamic boundary layer thicknesses at distances of $20 cm$ and $40 cm$ from the leading edge of the plate. The viscosity of air at $2 7^{?} C$ is $1.85 \times 1 0^{? 3} kg / ms$ . Assume unit depth in the $z$ direction.

Question

for air: specific gas constant R'= R/M= 287J/kg.K

thank you
$Example 1: Air at $ 27^{\circ} \mathrm{C} $ and $ 1 \mathrm{~atm} $ flows over a flat plate at a speed of \( 2 \mathrm{~m$

Example 1: Air at

2 7^{?} C

and

1 atm

flows over a flat plate at a speed of

2 m / s

. Calculate the hydrodynamic boundary layer thicknesses at distances of

20 cm

and

40 cm

from the leading edge of the plate. The viscosity of air at

2 7^{?} C

is

1.85 \times 1 0^{? 3} kg / ms

. Assume unit depth in the

z

direction.

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