Performance Examination of Geometry-Independent Near-Wall Second-Moment Closures in Simple and Backstep Flows

Abstract

Predictions of the characteristics of velocity fields in two simple flows, including a plane-channel flow and a zero-pressure-gradient flat-plate boundary layer, and in a separated flow behind a backward-facing step, by means of three selective geometry-independent low-Reynolds-number Reynolds stress models developed recently are presented. Choice of these models is made as a result of the comprehensive review of existing ways to compute complex-geometry turbulent flows, and taking into account the consideration of accurate, efficient, and stable calculations. Performance of the models is examined through comparison with available data of direct numerical simulation and measurements. A modification to the model developed by So and Yuan (1999) is then proposed and is shown to be capable of yielding better performance.

The authors gratefully acknowledge grant support from the National Science Council of the Republic of China for this work under Contract NSC 90-2212-E006-172.

Additional information

Notes on contributors

Sergey N. Yakovenko

The permanent address of Sergey N. Yakovenko is Institute of Theoretical & Applied Mechanics SBRAS, Novosibirsk 630090, Russia.