GATE 2023 Fluid Mechanics-2 Quiz 9

Which of the following are dimensionless quantities?

Which of the following lead to greater energy dissipation in turbulent flow

I. Larger eddy size

II. More viscosity of fluid

Boundary layer thickness increases as

A plate of length ‘L’ is towed through fluid at a velocity of 2m/s. The distance at which local drag coefficient is equal to average drag coefficient in the plate considering the laminar boundary layer over full length is

Water flows in a 80 mm pipe, at Reynolds number of 8000. The pipe is estimated to have, equivalent sand grain roughness of 0.16 mm. Determine the head loss expected in 500 m length of pipe in meter. Take kinematic viscosity as 10^-6 m²/sec and 1/ = 1.14-2*log(K/d + 21.25/R^0.9)

For a triangular channel having a vertex angle of 120°, the critical depth for a discharge of 3.0 m³/s would be:

A smooth two-dimensional flat plate is exposed to a wind velocity of 70 km per hour. If laminar boundary layer exists upto a value of R_ex equal to 3 × 10⁵ and kinematic viscosity of air = 1.49 × 10^–5 m²/s, what would be the maximum distance upto which laminar boundary persists?