- #1
womfalcs3
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Homework Statement
I have an empirically-derived equation for the shear stress of a fluid on a surface, given by the equation below.
I am supposed to take the derivative of density with respect to distance, and I must use this equation to find an expression for density.
Delta = Boundary layer thickness.
Nu = Kinematic Viscosity
u = Velocity
Rho = Density
Homework Equations
The Attempt at a Solution
I know the definition of shear stress for fluids (The second equation above). I've tried to equate it to the empirical formula, knowing that dynamic viscosity, mu, is just density*kinematic viscosity.
The density variables cancel though.
I can't have a tau term in the density expression, so I can't just algebraically manipulate the first equation to equal density.