Significant Deviations between First Order and Second Order

hawnaca · February 13, 2012, 15:58

Hello,

I'm calculating an airfoil with an angle of attack. When the Momentum is switched to First Order, the drag coefficient has the value of 0.01094.
When I switch the Momentum to Second Order the drag coefficient has the value of 0.01756.

Does anyone has an idea,why there is such a great difference?

xrs333 · February 14, 2012, 00:47

Results from 1st order are not acceptable, but this does not mean results of 2nd order are validated automatically.

February 13, 2012, 15:58	Significant Deviations between First Order and Second Order	#1
hawnaca New Member Matthias Join Date: Feb 2012 Posts: 1 Rep Power: 0	Hello, I'm calculating an airfoil with an angle of attack. When the Momentum is switched to First Order, the drag coefficient has the value of 0.01094. When I switch the Momentum to Second Order the drag coefficient has the value of 0.01756. Does anyone has an idea,why there is such a great difference?

February 14, 2012, 00:47		#2
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 16	Results from 1st order are not acceptable, but this does not mean results of 2nd order are validated automatically.