New Template: Body of Revolution Debate

[orange4boy]

What's the correct Reynolds number for the earth. I want to calculate where flow separation will occur. I don't have access to a large enough wind tunnel.

[IRONICK]

[Piotrsko]

All I can say is the reynolds number is going to be in the turbulent zone, and it wll be huge.

[orange4boy]

All I can say is the reynolds number is going to be in the turbulent zone, and it wll be huge.

It does feel like we are in the turbulent zone alright!

[aerohead]

Originally Posted by orange4boy

What's the correct Reynolds number for the earth. I want to calculate where flow separation will occur. I don't have access to a large enough wind tunnel.

Your question could be answered only within a very bounded, contextual framework. And not as a 'whole planet' system, as it's in a vacuum.
It's something that, for example, climate scientists would have to consider on a regional level, with respect to their general circulation models.
A 'model' of Earth, small enough to fit in a wind tunnel, at supercritical Reynolds number, would experience flow separation very close to 115-degrees downstream of it's forward stagnation point.