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Inflow conditions for inhomogeneous turbulent flows
Author(s) -
Barri Mustafa,
El Khoury George K.,
Andersson Helge I.,
Pettersen Bjørnar
Publication year - 2008
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1884
Subject(s) - inflow , turbulence , large eddy simulation , mechanics , series (stratigraphy) , open channel flow , flow (mathematics) , plane (geometry) , scale (ratio) , detached eddy simulation , channel (broadcasting) , computational fluid dynamics , bounded function , computer simulation , direct numerical simulation , reynolds number , geometry , mathematics , physics , reynolds averaged navier–stokes equations , computer science , geology , mathematical analysis , telecommunications , paleontology , quantum mechanics
A cost‐effective method to generate inflow conditions for direct numerical simulations of wall‐bounded flows is presented. The method recycles a finite‐length time series of instantaneous velocity planes extracted from a precursor simulation and has earlier proved efficient for free shear layers. Now a spatially developing plane channel flow is considered. Different durations t s of the time series are tested and compared. Excellent agreement with fully developed channel flow statistics is observed when t s equals or exceeds the large‐eddy turnover time scale. The present results are more realistic than those obtained with synthetic turbulence generation and at the same time substantially cheaper than running an auxiliary simulation in parallel. Copyright © 2008 John Wiley & Sons, Ltd.