sunnyguha said:for drag force between Re1 and Re10^5 = 0.5kpAv^2
but this isn't valid aft 10^5 ..
so ...
Drag force at very very high Reynolds number is the force exerted by a fluid on an object moving through it at a high speed. It is caused by the friction between the fluid and the surface of the object, and it is proportional to the square of the fluid velocity and the surface area of the object.
Drag force at very very high Reynolds number can be calculated using the drag equation, which takes into account the fluid density, fluid velocity, and the shape and size of the object. It can also be calculated using experimental data or computational fluid dynamics simulations.
The drag force at very very high Reynolds number is affected by the density and viscosity of the fluid, the shape and size of the object, and the speed of the object. Other factors such as surface roughness, turbulence, and compressibility of the fluid may also play a role.
As the Reynolds number increases, the drag force also increases. This is because at high Reynolds numbers, the fluid flow becomes more turbulent and chaotic, resulting in higher friction and pressure forces on the object, thus increasing the drag force.
Drag force at very very high Reynolds number can significantly affect the motion of an object. It can cause the object to slow down or even come to a complete stop if the drag force is greater than the propulsive force. It can also cause the object to change direction or experience turbulence, which can impact its stability and control.