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DEVELOPMENTS IN TWO-TIME-SCALE TURBULENCE MODELS APPLIED TO NON-EQUILIBRIUM FLOWS

Tania S. Klein
School of Mechanical, Aerospace and Civil Engineering The University of Manchester Oxford Road, Manchester, M13 9PL, UK

Timothy J. Craft
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, PO Box 88, Manchester M13 9PL, UK

Hector Iacovides
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering. The University of Manchester, Manchester M13 9PL, U.K.

Аннотация

Multiple-time-scale models have been recently studied by the authors with focus on predicting non-equilibrium flows. Two two-time-scale linear-eddy-viscosity models have been further developed, improved and tested over a wide range of test cases, including simple flows, such as channel flows and zero pressure gradient boundary layers, and more complex flows such as homogeneous shear flows, adverse-pressure-gradient, favourable-pressure-gradient and oscillatory boundary layers, normally strained flows, fully developed ramp up and oscillatory pipe flows and steady backward facing step flows. The two new models performed reasonably well in all test cases, specially when taking into account the inherent limitations of linear-eddy-viscosity schemes.