CUED Publications database

Reynolds number effects on scalar dissipation rate transport and its modeling in turbulent premixed combustion

Chakraborty, N and Swaminathan, N (2013) Reynolds number effects on scalar dissipation rate transport and its modeling in turbulent premixed combustion. Combustion Science and Technology, 185. pp. 676-709. ISSN 0010-2202

Full text not available from this repository.

Abstract

The effects of turbulent Reynolds number, Re t , on the transport of scalar dissipation rate of reaction progress variable in the context of Reynolds averaged Navier-Stokes simulations have been analyzed using three-dimensional simplified chemistry-based direct numerical simulation (DNS) data of freely propagating turbulent premixed flames with different values of Re t . Scaling arguments have been used to explain the effects of Re t on the turbulent transport, scalar-turbulence interaction, and the combined reaction and molecular dissipation terms. Suitable modifications to the models for these terms have been proposed to account for Re t effects, and the model parameters include explicit Re t dependence. These expressions approach expected asymptotic limits for large values of Re t . However, turbulent Reynolds number Re t does not seem to have any major effects on the modeling of the term arising from density variation. Copyright © Taylor and Francis Group, LLC.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:06
Last Modified: 23 Nov 2017 03:59
DOI: