A synthetic-eddy-method for generating inflow conditions for large-eddy simulations

The generation of inflow data for spatially developing turbulent flows is one of the challenges that must be addressed prior to the application of LES to industrial flows and complex geometries. A new method of generation of synthetic turbulence, suitable for complex geometries and unstructured mesh...

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Bibliographic Details
Published in:	International journal of heat and fluid flow 2006-08, Vol.27 (4), p.585-593
Main Authors:	Jarrin, N., Benhamadouche, S., Laurence, D., Prosser, R.
Format:	Article
Language:	eng
Subjects:	Channel flow Exact sciences and technology Flows in ducts, channels, nozzles, and conduits Fluid dynamics Fundamental areas of phenomenology (including applications) Inflow boundary conditions Isotropic turbulence homogeneous turbulence Large-eddy simulation Physics Spatially decaying isotropic turbulence Synthetic turbulence Turbulence simulation and modeling Turbulent flows, convection, and heat transfer
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Summary:	The generation of inflow data for spatially developing turbulent flows is one of the challenges that must be addressed prior to the application of LES to industrial flows and complex geometries. A new method of generation of synthetic turbulence, suitable for complex geometries and unstructured meshes, is presented herein. The method is based on the classical view of turbulence as a superposition of coherent structures. It is able to reproduce prescribed first and second order one point statistics, characteristic length and time scales, and the shape of coherent structures. The ability of the method to produce realistic inflow conditions in the test cases of a spatially decaying homogeneous isotropic turbulence and of a fully developed turbulent channel flow is presented. The method is systematically compared to other methods of generation of inflow conditions (precursor simulation, spectral methods and algebraic methods).
ISSN:	0142-727X 1879-2278