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 Average Nusselt number upto length L?
Average Nusselt number upto length L calculator uses Average Nusselt Number = 2*Nusselt Number(l) to calculate the Average Nusselt Number, Average Nusselt number upto length L formula is defined as a dimensionless quantity that characterizes the average convective heat transfer between a flat plate and a fluid flowing over it, providing a measure of the thermal boundary layer growth along the plate. Average Nusselt Number is denoted by NuavgL symbol.
How to calculate Average Nusselt number upto length L using this online calculator? To use this online calculator for Average Nusselt number upto length L, enter Nusselt Number(l) (NuL) and hit the calculate button. Here is how the Average Nusselt number upto length L calculation can be explained with given input values -> 32 = 2*16.