effect of refining mesh
 

hi everyone.
is it possible refining mesh makes the results worse ?

theorically yes, if your cell are so small in comparison with the phisical phenomena you are studing it is possible that the significant figures of the calculation in your cell are too small and therefore you will suffer numerical errors in your solution.

but you need to have a really fine mesh to have this happen. could you describe better what you are studing and the size/quantity of you cells?