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For air flow over a flat plate, velocity (U) and boundary layer thickness (δ) can be expressed respectively, as
If the free stream velocity is 2 m/s, and air has kinematic viscosity of 1.5 × 10-5 m2/s and density of 1.23 kg/m3, the wall shear stress at x = 1 m, is
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- 2.36 × 102 N/m2
- 43.6 × 10-3 N/m2
- 4.36 ×10-3N /m2
- 2.18 × 10-3 N/m2
Correct Option: C
NA
