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Old 07-14-2008, 06:16 PM   #46 (permalink)
cfg83
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adrive7 -

Quote:
Originally Posted by adrive7 View Post
I would try adding white area all around the vehicle. Also, get rid of the tires so you can see the air flow under the car. If you increased the time step (dt) take it back down to around .01. It looks like you are seeing effects from the edges of the pictures, but I don't know why it would do that. Adding white area around it should get rid of that problem (if thats what it is)

The Reynolds number is fine.
I agree. In my runs, I added a "road" below my "hover-car" and I put some empty space behind the car to analyze the wake that my mods created.

If you put the tires on, I think it is like having "Flintstone Roller" tires, because you are cutting off airflow below the vehicle. I *think* if you want to approximate tires, you could add shallow "bumps" where the tires are. Maybe the compromise is to approximate how much "area" the tires displace below the car and make the "bump" proportional to that. Does that make sense?

I used an Re of 2,500,000 in my second analysis, and I set it to 40 seconds. I also used a 2-bit Bitmap.

CarloSW2
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