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Published online on July 8, 2005, 10.1073/pnas.0504140102
PNAS | July 19, 2005 | vol. 102 | no. 29 | 10006-10011


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From The Cover
APPLIED MATHEMATICS
Numerical simulation of a laboratory-scale turbulent V-flame

J. B. Bell *, {dagger}, M. S. Day *, I. G. Shepherd {ddagger}, M. R. Johnson {ddagger} §, R. K. Cheng {ddagger}, J. F. Grcar *, V. E. Beckner *, and M. J. Lijewski *

*Center for Computational Science and Engineering and {ddagger}Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720

Communicated by Phillip Colella, University of California, Berkeley, CA, May 19, 2005 (received for review March 15, 2005)

We present a three-dimensional, time-dependent simulation of a laboratory-scale rod-stabilized premixed turbulent V-flame. The experimental parameters correspond to a turbulent Reynolds number, Ret = 40, and to a Damköhler number, Da = 6. The simulations are performed using an adaptive time-dependent low-Mach-number model with detailed chemical kinetics and a mixture model for differential species diffusion. The algorithm is based on a second-order projection formulation and does not require an explicit subgrid model for turbulence or turbulence/chemistry interaction. Adaptive mesh refinement is used to dynamically resolve the flame and turbulent structures. Here, we briefly discuss the numerical procedure and present detailed comparisons with experimental measurements showing that the computation is able to accurately capture the basic flame morphology and associated mean velocity field. Finally, we discuss key issues that arise in performing these types of simulations and the implications of these issues for using computation to form a bridge between turbulent flame experiments and basic combustion chemistry.

adaptive mesh refinement | low-Mach-number flow | turbulent premixed combustion

Abbreviation: PIV, particle image velocimetry.

§ Present address: Department of Mechanical Engineering, University of Ottawa, 161 Louis Pasteur, Room A215, Ottawa, ON, Canada K1N 6N5.

{dagger} To whom correspondence should be addressed at: Center for Computational Science and Engineering, Lawrence Berkeley National Laboratory, Mail Stop 50A-1148, 1 Cyclotron Road, Berkeley, CA 94720-8142. E-mail: jbbell{at}lbl.gov.


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