GATE 2026 Engineering Sciences Q41

Question

For a steady, laminar, and incompressible flow over a flat plate, the local skin friction coefficient is given as Cf = $\frac{0.664}{\sqrt{Re_x}}$, where $Re_x$ is the local Reynolds number. The density and kinematic viscosity of the fluid are 1.2 kg.m⁻³ and 1.5×10⁻⁵ m².s⁻¹, respectively. If the freestream velocity is 3 m.s⁻¹, then the local shear stress (in N.m⁻²) at x = 0.05 m is __________. (rounded off to three decimal places)

Accepted Answer

0.030 to 0.040