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Prediction of turbulent oscillatory flows in complex systems
Author(s) -
Tucker P. G.
Publication year - 2000
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 - 10.1002/1097-0363(20000730)33:6<869::aid-fld36>3.0.co;2-e
Subject(s) - turbulence , turbulence modeling , poisson's equation , computational fluid dynamics , mechanics , flow (mathematics) , enclosure , mathematics , reynolds number , reynolds stress , k epsilon turbulence model , poisson distribution , statistical physics , physics , mathematical analysis , computer science , statistics , telecommunications
The economical prediction of a turbulent oscillatory isothermal flow at transitional Reynolds numbers is considered for an enclosure representative of an idealized electronics system. To assess the accuracy of numerical models, comparison is made with measurements. Normal wall distances, required in some turbulence models, are evaluated using a modified Poisson equation‐based technique. Solutions of the Poisson and fluid flow equations are accelerated using multi‐level schemes, giving valuable time‐savings. The Poisson equation‐based wall distance technique is shown to be effective. Zero‐ to two‐equation turbulence techniques are tested, including zonal and non‐linear eddy viscosity models. Of the nine models tested, the zonal models showed greatest potential. Copyright © 2000 John Wiley & Sons, Ltd.