Meshing refinement

Zurayk

Hello,

My question may seem very general,

I have done two models different in meshing density, and the result was that: the one with coarses mesh gives closer results to the experimental data we have. so the one with coarser mesh gives better results, I was wondering if this is explainable generally? or does it depend on the specific case im dealing with? Can a coarser mesh give better results than a finer mesh?

thanx for your time