Résumé : The present report examines the application to Grid Computing of two fluid simulation codes. The first code, AERO-F, simulates aerodynamic flows for external and internal non-reacting flows. The second code, AEDIF, simulates two-phase compressible flows. The work examines the application of these codes executing on parallel processors using the Message Passing Interface (MPI) on the MecaGRID that connects the clusters of INRIA Sophia Antipolis, Ecole des Mines de Paris at Sophia Antipolis, and the IUSTI in Marseille. Methods to optimize the MecaGRID applications accounting for the different processor speeds at the different sites and different RAM sizes are presented. The Globus Alliance software is used for the Grid applications. Suggestions for future research are given