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An Immersed Volume Method for Large Eddy Simulation of compressible flows

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1360
pages 1334-1341

D. Cecere
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

E. Giacomazzi
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

F. R. Picchia
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

N. Arcidiacono
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

F. Donato
Dep. of Electrical Enginnering, "Sapienza" University of Rome; ENEA, Italian Agency for New Technologies Energy and Environment, Rome, Italy

Sinopsis

An efficient Immersed Volume Method (IVM) for the unsteady computation of compressible viscous flows with complex shaped stationary geometries and staggered finite difference approach on a non uniform cartesian grid is presented. A background Cartesian mesh is generated for each staggered variable and a finite volume approach is adopted in the layer near the immersed boundaries by means of cut cell method. Accurate description of the real three-dimensional geometry inside the cell volume is preserved by means of triangulated surface description istead of approximating it by a plane. The overall second-order accuracy of the base solver is preserved by means of high order flux reconstruction in the cut cells. The numerical code solver is parallelized using domain decomposition and message passing interface. The robustness and accuracy of the method is proved simulating a stoichiometric Methane/air premixed flame anchored by means of a cube at Re = 3200 and a flow past a sphere with sting at Re = 51500.

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