Which of these laws define the dimensionless quantities u^+ and y^+?
A. Velocity-defect law
B. Log-law
C. Newton’s law of viscosity
D. Law of the wall
Correct option is D. Law of the wall
The law of the wall is the relationship between the mean flow velocity and the distance from the wall derived using dimensional analysis. This gives the relationship between two important dimensionless quantities u^+ and y^+.