UNSPECIFIED. (2000) Prediction of turbulent oscillatory flows in complex systems. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 33 (6). pp. 869-895. ISSN 0271-2091

Abstract

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 (C) 2000 John Wiley & Sons, Ltd.

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