1. Aerodynamics

Viscous Flow — Quiz

Test your understanding of viscous flow with 5 practice questions.

Practice Questions

Question 1

Which region in a high-Reynolds-number flow over a solid body is defined by significant viscous effects and a velocity gradient from zero at the wall to the freestream value?

Question 2

Which approximation simplifies the boundary layer equations by assuming negligible pressure variation normal to the surface?

Question 3

In a laminar boundary layer over a flat plate, the local thickness $\delta$ varies with distance $x$ as $\delta\propto\sqrt{x}$. If the distance from the leading edge increases by a factor of 9, by what factor does $\delta$ increase?

Question 4

How does increasing the kinematic viscosity $\nu$ of a fluid affect the laminar boundary layer thickness $\delta$ on a flat plate for a given freestream velocity and distance?

Question 5

Which formula gives the average skin friction coefficient $C_{f,\mathrm{avg}}$ for a laminar boundary layer over a flat plate of length $L$ in terms of the Reynolds number $Re_L$?