Development of a 3D Parallel Multigrid Solver for Fast and Accurate Laminar Steady Flame Computations
An efficient parallel computer code has been developed for fast and accurate laminar steady flame computations at low Mach numbers. It can handle 2D and 3D geometries on locally-refined unstructured grids. Two subsystems are in charge respectively of the low-Mach Navier-Stokes equations and of the thermo-reactive equations, and the resulting, fully coupled, system is solved by time-marching until the steady solution is reached. The linearized equations are solved by a Bi-CGstab algorithm, preconditioned by multigrid cycles. Detailed models are used for chemistry and transport to provide a high level of accuracy. However, a powerful method of simplified chemistry is also available, in order to get easily and at a low cost good starting solutions. Such results can then be used as appropriate starting points for more accurate computations with detailed chemistry and transport.
KeywordsMass Fraction Flame Front Premix Flame Detailed Chemistry Injection Velocity
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