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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

A DYNAMIC LARGE EDDY MODEL FOR SIMULATING TURBULENT REACTIVE FLOW WITH AN ADAPTIVE FINITE ELEMENT METHOD

Jiajia Waters
Los Alamos National Laboratory, T-3 Fluid Dynamics and Solid Mechanics

David Carrington
Los Alamos National Laboratory, T-3 Fluid Dynamics and Solid Mechanics

Xiuling Wang
Purdue University Northwest

Darrell W. Pepper
NCACM, Department of Mechanical Engineering, University of Nevada Las Vegas, Las Vegas, NV 89154, USA

Abstract

An adaptive Finite Element Method (FEM) is used for the solution of turbulent reactive flows in 3D utilizing massively parallel methods for fluid dynamic and combustion modeling associated with engines. A dynamic LES method permits transition from laminar to turbulent flow - no assumptions are required concerning turbulent sublayers near walls in bounded flows. This capability is ideal for engine configurations where the turbulent wall layers are never in equilibrium and the flow is not always turbulent. The developed h-adaptive FEM flow solver uses 'h' adaptation to provide for grid refinement. The FEM solver has been optimized for parallel processing (using MPI) for cluster and high performance computers and can solve multi-species fluid problems using a dynamic Large Eddy Simulation (LES) model for turbulent reactive flow.

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