Mesh independent issue?

Sid

Hi, What is the so-called "mesh independent issue"? It sounds like that a CFD solution shouldn't depend on grids. So, you compute solutions for some different grids, and make sure the solutions look the same. Is this what you do?

And, What exactly the purpose of it? Is it to check the numerical schemes? So, if the solution depends on grids, you throw that schme away, and try another, looking for a mesh independent scheme? Or something else, like mesh independent boundary conditions or mesh independent turbulence modelling? Or all of them?

Any comments are welcome! Thank you for your attention.