What is external flow?
In fluid mechanics, external flow is such a flow that boundary layers develop freely, without constraints imposed by adjacent surfaces. Accordingly, there will always exist a region of the flow outside the boundary layer in which velocity, temperature, and/or concentration gradients are negligible. It can be defined as the flow of a fluid around a body that is completely submerged in it.
An example includes fluid motion over a flat plate (inclined or parallel to the free stream velocity) and flow over curved surfaces such as a sphere, cylinder, airfoil, or turbine blade, air flowing around an airplane and water flowing around the submarines.
How to Calculate Density given local friction coefficient?
Density given local friction coefficient calculator uses Density = 2*Wall Shear Stress/(Local Friction Coefficient*(Free Stream Velocity^2)) to calculate the Density, Density given local friction coefficient formula is defined as a measure of mass per unit volume of a fluid, which is influenced by the local friction coefficient, and is a critical parameter in understanding the behavior of fluids in various flow regimes, particularly in the context of flow over a flat plate. Density is denoted by ρ symbol.
How to calculate Density given local friction coefficient using this online calculator? To use this online calculator for Density given local friction coefficient, enter Wall Shear Stress (τw), Local Friction Coefficient (Cfx) & Free Stream Velocity (u∞) and hit the calculate button. Here is how the Density given local friction coefficient calculation can be explained with given input values -> 0.004355 = 2*801189.2/(0.328*(70^2)).