I can provide step-by-step calculations if you have a specific in mind.
A 1:20 scale model of a submarine is tested in a wind tunnel to determine the drag force. The actual submarine moves underwater at a speed of 10 m/s. The density of water is $\rho_w = 1000 , \textkg/m^3$ and viscosity $\mu_w = 1.0 \times 10^-3 , \textPa\cdot\texts$. The wind tunnel uses air at $\rho_a = 1.2 , \textkg/m^3$ and $\mu_a = 1.8 \times 10^-5 , \textPa\cdot\texts$. advanced fluid mechanics problems and solutions
Deterministic solutions are impossible for turbulent flows. Instead, we use Reynolds-Averaged Navier-Stokes (RANS) equations, splitting velocity into mean and fluctuating components ( I can provide step-by-step calculations if you have
How do you mathematically represent a uniform flow of velocity U∞cap U sub infinity end-sub passing over a solid cylinder of radius The Solution: The density of water is $\rho_w = 1000