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A direct numerical simulation study of interface propagation in homogeneous turbulence

Yu, Rixin LU ; Bai, Xue-Song LU and Lipatnikov, Andrei N. (2015) In Journal of Fluid Mechanics 772(June). p.127-164
Abstract
A 3D direct numerical simulation (DNS) study of the evolution of a self-propagating interface in forced constant-density statistically stationary homogeneous isotropic turbulence was performed by solving Navier–Stokes and level-set equations under a wide range of conditions that cover various (from 0.1 to 2.0) ratios of the interface speed SL to the r.m.s. turbulent velocity U′ and various (50, 100 and 200) turbulent Reynolds numbers Re. By analysing computed data, the following issues were addressed: (i) dependence of the speed and thickness of the fully developed statistically planar mean front that envelops the interface on U′/SL and Re, (ii) dependence of the fully developed mean turbulent flux of a scalar c that characterizes the... (More)
A 3D direct numerical simulation (DNS) study of the evolution of a self-propagating interface in forced constant-density statistically stationary homogeneous isotropic turbulence was performed by solving Navier–Stokes and level-set equations under a wide range of conditions that cover various (from 0.1 to 2.0) ratios of the interface speed SL to the r.m.s. turbulent velocity U′ and various (50, 100 and 200) turbulent Reynolds numbers Re. By analysing computed data, the following issues were addressed: (i) dependence of the speed and thickness of the fully developed statistically planar mean front that envelops the interface on U′/SL and Re, (ii) dependence of the fully developed mean turbulent flux of a scalar c that characterizes the state of the fluid (c=0 and 1 ahead and behind the interface respectively) on U′/SL and Re, (iii) evolution of the mean front speed, its thickness, and the mean scalar flux during the front development after embedding a planar interface into the forced turbulence and (iv) relation between canonical and conditioned moments of the velocity, velocity gradient and pressure gradient fields. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
turbulent reacting flows, intermittency, flames
in
Journal of Fluid Mechanics
volume
772
issue
June
pages
127 - 164
publisher
Cambridge University Press
external identifiers
  • wos:000357029100009
  • scopus:84929466459
ISSN
0022-1120
DOI
10.1017/jfm.2015.211
language
English
LU publication?
yes
id
8d8d224c-bf80-4d99-a8fc-5dfa531b6ee4 (old id 5367902)
date added to LUP
2015-08-21 08:48:42
date last changed
2017-07-23 03:25:04
@article{8d8d224c-bf80-4d99-a8fc-5dfa531b6ee4,
  abstract     = {A 3D direct numerical simulation (DNS) study of the evolution of a self-propagating interface in forced constant-density statistically stationary homogeneous isotropic turbulence was performed by solving Navier–Stokes and level-set equations under a wide range of conditions that cover various (from 0.1 to 2.0) ratios of the interface speed SL to the r.m.s. turbulent velocity U′ and various (50, 100 and 200) turbulent Reynolds numbers Re. By analysing computed data, the following issues were addressed: (i) dependence of the speed and thickness of the fully developed statistically planar mean front that envelops the interface on U′/SL and Re, (ii) dependence of the fully developed mean turbulent flux of a scalar c that characterizes the state of the fluid (c=0 and 1 ahead and behind the interface respectively) on U′/SL and Re, (iii) evolution of the mean front speed, its thickness, and the mean scalar flux during the front development after embedding a planar interface into the forced turbulence and (iv) relation between canonical and conditioned moments of the velocity, velocity gradient and pressure gradient fields.},
  author       = {Yu, Rixin and Bai, Xue-Song and Lipatnikov, Andrei N.},
  issn         = {0022-1120},
  keyword      = {turbulent reacting flows,intermittency,flames},
  language     = {eng},
  number       = {June},
  pages        = {127--164},
  publisher    = {Cambridge University Press},
  series       = {Journal of Fluid Mechanics},
  title        = {A direct numerical simulation study of interface propagation in homogeneous turbulence},
  url          = {http://dx.doi.org/10.1017/jfm.2015.211},
  volume       = {772},
  year         = {2015},
}