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A high efficiency parallel unstructured solver dedicated to internal combustion engine simulation. (English) Zbl 1429.76022
Summary: IFP-C3D, a hexahedral unstructured parallel solver dedicated to multiphysics calculation is being developed at IFP to compute the compressible combustion in internal engines. IFP-C3D uses an unstructured formalism, the finite volume method on staggered grid, time splitting, SIMPLE loop, subcycled advection, turbulent and Lagrangian spray and a liquid film model. Original algorithms and models such as the conditional temporal interpolation methodology for moving grids, the remapping algorithm for transferring quantities on different meshes during the computation enable IFP-C3D to deal with complex moving geometries with large volume deformation induced by all moving geometrical parts (intake/exhaust valve, piston). Large super-scalar machines up to 1000 processors are being widely used and IFP-C3D has been optimized for running on these Cluster machines. IFP-C3D is parallelized using the Message Passing Interface (MPI) library to distribute a calculation over a large number of processors. Moreover, IFP-C3D uses an optimized linear algebraic library to solve linear matrix systems and the METIS partitionner library to distribute the computational load equally for all meshes used during the calculation and in particular during the remap stage when new meshes are loaded. Numerical results and performance timing are presented to demonstrate the computational efficiency of the code.

MSC:
76-06 Proceedings, conferences, collections, etc. pertaining to fluid mechanics
80A25 Combustion
80M12 Finite volume methods applied to problems in thermodynamics and heat transfer
65Y05 Parallel numerical computation
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