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Air flow accuracy based on computational domain size

Question asked by Karim Alame on Jun 15, 2011
Latest reply on Jun 27, 2011 by Bill McEachern

Hi all,

 

I'm currently running  a simulation past an airfoil at a high Reynold number of 6*10^6.

I have messed with two diffferent settings, whereby I used the default comp. domain and then another with a much larger domain ( so I dont get flow interaction with the boundaries) .

The resultant forces are considerably different.

Now I do want more accuracy but with a 1.8 GHz processor and 3 GB of RAM I'm pretty limited, a typical large domain calculation took me around 30 hours the other day.

 

Also, Im running it for a physical time of 1 sec, would increasing that time lead to a better accuracy ?

 

Thanks for your time, any input would be appreciated !

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