cute, but 21x21 nodes wont get you far
Ben, I heard an old expression which you might want to take to heart:
Before you can use the 'Tricks of the Trade', you have to 'Learn the Trade'.
I have suggested this primer many times, but here it is again:
"Using Computational Fluid Dynamics" by C.T. Shaw
had you the knowledge in this book, you question would not have been asked
and I can, and do, assure you that without at least grad work in this area you will not master it
(now I will hear from the engrs with 'only' BSs using CFD, but such is generally true)
very heavy sledding
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