Size of control volume
 

Hi,
Why do the results change drastically if I increase the size of the control volume (eg. the mesh around an airfoil)?
The result should improve for a bigger control volume, however in my case the results diverge.
Thanks.

Hi John,

in most cases you obtain a better result as much as fine your mesh is. Not the other way. An exception from this rule is for example spray-simulation.

Christof