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 wallThe question was posed to me during an interview for a job.Question is taken from Turbulent Boundary Layer in section Turbulence Modelling of Computational Fluid Dynamics

Which of these laws define the dimensionless quantities u^+ and y^+?(a

1.	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 wallThe question was posed to me during an interview for a job.Question is taken from Turbulent Boundary Layer in section Turbulence Modelling of Computational Fluid Dynamics
Answer» Correct option is (d) Law of the wall The explanation is: 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^+.

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