Large Eddy Simulation (LES) with Moving Meshes on a Rapid Compression Machine: Part 2: Numerical Investigations Using Euler–Lagrange-Technique

Franco Magagnato, Martin Gabi, Thomas Heidenreich, Amin Velji and Ulrich Spicher
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Franco Magagnato: University of Karlsruhe, Institute of Fluid Machinery
Martin Gabi: University of Karlsruhe, Institute of Fluid Machinery
Thomas Heidenreich: University of Karlsruhe, Institute of Reciprocating Engines
Amin Velji: University of Karlsruhe, Institute of Reciprocating Engines
Ulrich Spicher: University of Karlsruhe, Institute of Reciprocating Engines

A chapter in High Performance Computing in Science and Engineering `07, 2008, pp 419-430 from Springer

Abstract: Abstract The flow inside a simplified one-stroke engine with squared cross section has been calculated with compressible Large Eddy Simulation (LES) using our code SPARC and compared with the measurements on the same geometry. The one-stroke engine has a turbulence generator, which can ether generate a tumble or homogenous turbulence depending on the configuration. By waiting different amount of time after the turbulence generation process a variable turbulence level can be achieved. During the up going motion of the piston the turbulent fuel mixture is compressed and ignited by a row of spark plugs. The simulation has been using more then 8 million points for the space discretization. A space conservation law was used to calculate the grid motion with Euler-Lagrange technique. The mesh was refined in the shear layers and close to the wall so that y+

Keywords: Large Eddy Simulation; Compression Phase; Turbulence Generator; Compression Stroke; Subgrid Scale Model (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1007/978-3-540-74739-0_28

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