[bilal8700]

What is the influence of Courant number, the diffusion number and the Péclet number on the behavior of the numerical solution?

[FMDenaro]

Originally Posted by bilal8700

What is the influence of Courant number, the diffusion number and the Péclet number on the behavior of the numerical solution?

Generally the function CFL(Peh) defines a stability region for your numerical algorithm. All values within the stability region ensure the stability of the solution as well as low cfl and low Peh number ensure a better quality of the solution