TITLE: Numerical phenomena in the FD simulations of the waves propagation
             through different media

                   ¹Physics Department, University "Politechnica" Bucharest,
                        ²Departimento di Fisica, Politecnico di Torino, Italy

ABSTRACT:
 

The goal of this work is the study of main features of some classical and newly found out numerical phenomena associated to the Finite Difference (FD) simulations of the wave propagation through media with sharp interfaces and attenuative character and of other physical processes. The mechanism of these numerical phenomena were studied in detail

the obtained findings allowing us to predict the distorsions of the simualated physical processes. Of course the good knowledge of the main features and of the mechanisms of the most important numerical phenomena allows us also to avoid the appearance of drastic distorsionsof the simulated evolutions, as well as the optimisations of some numerical simulations.

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