Parallel NSMB

One of the key priorities in aerodynamic offices of many engineering companies is to develop and improve simulation tools to study the aerodynamics around complete vehicles or in complex internal geometries. The location of the interface between two layers is determined during the solution process. From the user point of view, the database file appears as a single UNIX file; hence, all the information related to the simulation can be directly saved on an archival system without possible loss of information. The design of the baseline parallel NSMB version was subject to important constraints with respect to portability, minimization of changes in the code, and ease of future maintenance. A priori load balancing is not suitable for computer architectures for which the performance is sensitive to the problem size. In these cases, dynamic load balancing should be considered to redistribute the blocks based on timings. The full aircraft configuration AS28G was successfully run on several parallel computers of different architectures and the gain in performance using parallel computers was demonstrated.