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Effects of Lewis number on conditional fluid velocity statistics in low Damköhler number turbulent premixed combustion: A direct numerical simulation analysis
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10.1063/1.4795548
/content/aip/journal/pof2/25/4/10.1063/1.4795548
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/4/10.1063/1.4795548

Figures

Image of FIG. 1.
FIG. 1.

Distribution of normalised vorticity magnitude in the central plane for cases (a)–(e) A–E at the time when the statistics were extracted. The white lines indicate reaction progress variable contours from = 0.1 to 0.9 from left to right in steps of 0.1.

Image of FIG. 2.
FIG. 2.

(a) Variations of with across the flame brush for all cases considered here; (b) pdfs of at the location corresponding to for all cases considered here.

Image of FIG. 3.
FIG. 3.

Variations of with across the flame brush along with the predictions of Eqs. (8a), (15), and (16) for cases (a)–(e) A–E. Variations of (f) and (g) with across the flame brush for all cases considered here.

Image of FIG. 4.
FIG. 4.

Variations of with across the flame brush along with the predictions of Eqs. (8b) and (17a)–(17c) for cases (a)–(e) A–E.

Image of FIG. 5.
FIG. 5.

Variations of and with across the flame brush along with the predictions of Eqs. (10), (18), and (19) for cases (a)–(e) A–E.

Image of FIG. 6.
FIG. 6.

Variations of and with across the flame brush along with the predictions of Eqs. (10), (18), and (19) for cases (a)–(e) A–E.

Image of FIG. 7.
FIG. 7.

Variations of and with across the flame brush along with the predictions of Eqs. (10), (20), and (21a) for cases (a)–(e) A–E.

Image of FIG. 8.
FIG. 8.

Variations of and with across the flame brush along with the predictions of Eqs. (10), (20), and (21a) for cases (a)–(e) A–E.

Image of FIG. 9.
FIG. 9.

Variations of and with across the flame brush along with the predictions of Eqs. (12) and (13) according to (shown as model 1 in the legend) and (shown as model 2 in the legend) and Eq. (22) for cases (a)–(e) A–E.

Image of FIG. 10.
FIG. 10.

Variations of and with for cases (a)–(e) A–E.

Image of FIG. 11.
FIG. 11.

Variations of with across the flame brush along with the predictions of Eqs. (23a) (i.e., ) and (23b) for cases (a)–(e) A–E. The model given by Eq. (23b) with and are shown as model 1 and model 2, respectively, in the legend.

Image of FIG. 12.
FIG. 12.

Variations of with across the flame brush along with the predictions of Eqs. (23a) (i.e., ) and (23b) for cases (d)–(f) A–C. The model given by Eq. (23b) with and are shown as model 1 and model 2, respectively, in the legend.

Tables

Generic image for table
Table I.

Initial values of simulation parameters and non-dimensional numbers relevant to the DNS database.

Generic image for table
Table II.

The effects of Lewis number on normalised turbulent flame speed / and normalised flame surface area / after 3.34 initial eddy turn over times.

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/content/aip/journal/pof2/25/4/10.1063/1.4795548
2013-04-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of Lewis number on conditional fluid velocity statistics in low Damköhler number turbulent premixed combustion: A direct numerical simulation analysis
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/4/10.1063/1.4795548
10.1063/1.4795548
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