A criteria for grid size.

[Victor]

Hi

I am solving a flow problem around a cylinder using finite differences
and I have a grid size question. The question is not about stability
(my grid is stable), but about accuracy. When I have a problem that
has one result (a certain number) I set my grid and my convergence
values so the first 3 or 4 significant digits of the wanted result.
However, in my case I solve a shear 2D flow around a cylinder and I
don't really have one resulting parameter. What are the common ways to
determine when the grid is fine enough?

Victor Chernov

[Victor]

[Victor]

On Mar 11, 2:06 pm, m...@mine.net wrote:
> On Tue, 11 Mar 2008 01:50:05 -0700 (PDT), in
> sci.physics.computational.fluid-dynamics Victor <Moll...@gmail.com>

wrote:

> Total drag?

Though about it, but it's a Couette shear flow. Drag is zero.