Quote:
Originally Posted by 99metro
The following is just my opinion and to be taken as just that.
I understand the extreme limitations of this program. I can basically use a cardboard cutout, non-3D version of something and get a jist of what's going on. Just a sliver down the middle. There are lots of dynamics with flow from so many angles that this program can't show that would greatly affect this sliver of a flow. But I think I can use this as a tool along with independent experiments to help visualize a path to take.
Tuft testing is great for near-car wind flow dynamics, but this program makes me realize even more the importance of flow going on 10 feet or more behind me. Tuft testing with 10 foot streamers behind the vehicle ought to be added to any aero experiments along with near-car tuft testing. It would sure be cool to see if the aero experiment resulted in even flow past the vehicle or if it resulted in a worse situation.
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I know that BMW has included very long streamers during photo sessions within their wind tunnel.
Attaching a 'rake',with attached streamers ahead and to the sides of a vehicle would allow for visualization of the outer flow field.
The streamers would need to be of the lowest mass possible to counteract gravity's attempt to 'ground' them.
Aerodynamicists have resorted to helium-filled bubbles for neutral-buoancy in attempts at 3-D flow visualization.
Smoke seems to remain the 'KING' for visualization.