Statistics of Conditional Fluid Velocity in the Corrugated Flamelets Regime of Turbulent Premixed Combustion : A Direct Numerical Simulation Study
Joint Authors
Chakraborty, Nilanjan
Lipatnikov, Andrei N.
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-10-05
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
The statistics of mean fluid velocity components conditional in unburned reactants and fully burned products in the context of Reynolds Averaged Navier Stokes (RANS) simulations have been studied using a Direct Numerical Simulation database of statistically planar turbulent premixed flame representing the corrugated flamelets regime combustion.
Expressions for conditional mean velocity and conditional velocity correlations which are derived based on a presumed bimodal probability density function of reaction progress variable for unity Lewis number flames are assessed in this study with respect to the corresponding quantities extracted from DNS data.
In particular, conditional surface averaged velocities (ui)¯Rs and the velocity correlations (uiu)j¯Rs in the unburned reactants are demonstrated to be effectively modelled by the unconditional velocities (ui)¯R and velocity correlations (uiuj)¯R, respectively, for the major part of turbulent flame brush with the exception of the leading edge.
By contrast, conditional surface averaged velocities (ui)¯Ps and the velocity correlations (uiu)j¯Ps in fully burned products are shown to be markedly different from the unconditional velocities (ui)¯P and velocity correlations (uiuj)¯P, respectively.
American Psychological Association (APA)
Chakraborty, Nilanjan& Lipatnikov, Andrei N.. 2011. Statistics of Conditional Fluid Velocity in the Corrugated Flamelets Regime of Turbulent Premixed Combustion : A Direct Numerical Simulation Study. Journal of Combustion،Vol. 2011, no. 2011, pp.1-13.
https://search.emarefa.net/detail/BIM-486362
Modern Language Association (MLA)
Chakraborty, Nilanjan& Lipatnikov, Andrei N.. Statistics of Conditional Fluid Velocity in the Corrugated Flamelets Regime of Turbulent Premixed Combustion : A Direct Numerical Simulation Study. Journal of Combustion No. 2011 (2011), pp.1-13.
https://search.emarefa.net/detail/BIM-486362
American Medical Association (AMA)
Chakraborty, Nilanjan& Lipatnikov, Andrei N.. Statistics of Conditional Fluid Velocity in the Corrugated Flamelets Regime of Turbulent Premixed Combustion : A Direct Numerical Simulation Study. Journal of Combustion. 2011. Vol. 2011, no. 2011, pp.1-13.
https://search.emarefa.net/detail/BIM-486362
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-486362