Large Eddy Simulation

Joseph Mathew

Abstract


Large eddy simulation (LES) is an emerging technique for obtaining an approximation to turbulent flow fields. It is an improvement over the widely prevalent practice of obtaining means of turbulent flows when the flow has large scale, low frequency, unsteadiness. An introduction to the method, its general formulation, and the more common modelling for flows without reaction, is discussed. Some attempts at extension to flows with combustion have been made. Examples from present work for flows with and without combustion are given. The final example of the LES of the combustor of a helicopter engine illustrates the state-of-the-art in application of the technique.

Defence Science Journal, 2010, 60(6), pp.598-605, DOI:http://dx.doi.org/10.14429/dsj.60.602


Keywords


Computational fluid dynamics, large eddy simulation, turbulent flow, subgrid modelling, dynamics smagorinsky model, approximate deconvolution model

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