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 Free stream fluid temperature?
Free stream fluid temperature calculator uses Free Stream Fluid Temperature = 2*Film temperature-Plate Surface Temperature to calculate the Free Stream Fluid Temperature, Free stream fluid temperature formula is defined as the temperature of the fluid outside the boundary layer, unaffected by the presence of the flat plate, and is a crucial parameter in understanding the heat transfer and fluid flow characteristics in various engineering applications. Free Stream Fluid Temperature is denoted by T∞ symbol.
How to calculate Free stream fluid temperature using this online calculator? To use this online calculator for Free stream fluid temperature, enter Film temperature (Tf) & Plate Surface Temperature (Tw) and hit the calculate button. Here is how the Free stream fluid temperature calculation can be explained with given input values -> -203.15 = 2*323.15-303.15.