On the limiters of two-equation turbulence models

Authors: Chang Hwan Park; Seung O Park

Source: International Journal of Computational Fluid Dynamics, Volume 19, Number 1, January, 2005 , pp. 79-86(8)

Publisher: Taylor and Francis Ltd

Key:

- Free Content

- New Content

- Subscribed Content

- Free Trial Content

Abstract:

When two-equation turbulence models are used, unrealistically large values of turbulence variables can appear due to the infringement of a realizability condition or to numerical error. To cure this in practical calculations, various limiters on the source terms are often employed. In the present work, a mathematically correct bound for eddy viscosity is obtained from the realizability condition itself. From this, realizability bounds for several terms of model equations are given. The effects of various bounds including the present one, are investigated on the predictions of fundamental flows including simple shear flows, supersonic compression ramp flow and supersonic base flow. It is shown that the limiter affects the prediction very significantly.

Keywords: Realizability condition; Realizability bounds; Limiters; Two-equation turbulence model; Numerical robustness

Document Type: Research article

DOI: 10.1080/10618560412331286292

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$45.29 plus tax