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Wrinkled flames and cellular patterns
2007
ACM Transactions on Graphics
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Figure 1: A dragon emits a flame, computed with the third order DSD equations coupled to the Navier-Stokes equations. ...
, ONR N00014-02-1-0720, NSF ACI-0323866, NSF IIS-0326388 and NSF ITR-0121288. ...
Acknowledgements Research supported in part by an ONR YIP award and a PECASE award (ONR N00014-01-1-0620), a Packard Foundation Fellowship, ONR N0014-06-1-0393, ONR N00014-05-1-0479 for a computing cluster ...
doi:10.1145/1239451.1239498
fatcat:43zatmnfl5amzj4gxdp2esdmmu
Wrinkled flames and cellular patterns
2007
ACM SIGGRAPH 2007 papers on - SIGGRAPH '07
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We show how to make use of the DSD framework in the context of computer graphics simulations of flames and fire to obtain interesting features such as flame wrinkling and cellular patterns. ...
In particular, researchers in the field of detonation shock dynamics (DSD) have derived a set of equations which exhibit characteristic cellular patterns. ...
, ONR N00014-02-1-0720, NSF ACI-0323866, NSF IIS-0326388 and NSF ITR-0121288. ...
doi:10.1145/1275808.1276436
fatcat:futzpdxi6nbzvk2pv75qeuvqsi
Wrinkled flames and cellular patterns
2007
ACM Transactions on Graphics
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Figure 1: A dragon emits a flame, computed with the third order DSD equations coupled to the Navier-Stokes equations. ...
, ONR N00014-02-1-0720, NSF ACI-0323866, NSF IIS-0326388 and NSF ITR-0121288. ...
Acknowledgements Research supported in part by an ONR YIP award and a PECASE award (ONR N00014-01-1-0620), a Packard Foundation Fellowship, ONR N0014-06-1-0393, ONR N00014-05-1-0479 for a computing cluster ...
doi:10.1145/1276377.1276436
fatcat:yxobri37arb77nvcf3fed3dweu
Intrinsic Flame Instabilities in Premixed and Nonpremixed Combustion
2007
Annual Review of Fluid Mechanics
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It is responsible for the formation of sharp folds and creases in the flame front and for the wrinkling observed over the surface of expanding flames. ...
In contrast, instabilities in diffusion flames, which give rise to cellular and oscillating flames, are mainly driven by diffusive-thermal effects, with thermal expansion playing a secondary role. ...
A typical cellular pattern is shown in Figure 9 . ...
doi:10.1146/annurev.fluid.38.050304.092153
fatcat:zqmemk2jebccfhfzkt3jepz6ke
Heat release rate variations in high hydrogen content premixed syngas flames at elevated pressures: Effect of equivalence ratio
2017
International journal of hydrogen energy
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exhibiting similar cellular and wrinkling flames. ...
The flame structures and the heat release rate were analysed and compared between fuel-lean, stoichiometric and fuel-rich centrally ignited spherical flames. ...
exhibiting similar cellular and wrinkling flames. ...
doi:10.1016/j.ijhydene.2016.11.205
fatcat:zj7owssltneedc5qtlppxvnlh4
Interaction of turblence and chemistry in a low-swirl burner
2008
Journal of Physics, Conference Series
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We focus on the differences in flame behavior for the two fuels, particularly on the hydrogen flame, which burns with a cellular structures. ...
We consider two fuels, methane and hydrogen, each at two turbulent intensities. Here we examine some of the basic properties of the flow field and the flame structure. ...
The cellular burning patterns additionally make the analysis of experimental data problematic and can lead to significant inaccuracies or misinterpretations. ...
doi:10.1088/1742-6596/125/1/012027
fatcat:dapmrpnmrfanxchvlserkgbfru
Turbulent Flame Speeds of G-equation Models in Unsteady Cellular Flows
[article]
2012
arXiv
pre-print
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However, such frequency locking phenomenon disappears in viscous G-equation, and in the inviscid G-equation if time periodic oscillation of the cellular flow is replaced by time stochastic oscillation. ...
We perform a computationl study of front speeds of G-equation models in time dependent cellular flows. ...
time that the flame front cannot be really wrinkled, and so remains almost planar. ...
arXiv:1210.1671v1
fatcat:gonxry5i3ng3jc43unri6anagy
The cellular burning regime in type Ia supernova explosions
2004
Astronomy and Astrophysics
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The fundamental effects that dominate the flame evolution here are the Landau-Darrieus instability and its nonlinear stabilization, leading to a stabilization of the flame in a cellular shape. ...
This is directly connected to the questions of active turbulent combustion (a mechanism of flame destabilization and subsequent self-turbulization) and a deflagration-to-detonation transition of the flame ...
and Numerics for Conservation Laws" under contract HI 534/3. ...
doi:10.1051/0004-6361:20035721
fatcat:wv4qaxc3kvbqjjts5gg6se3a44
Turbulent Flame Speeds of G-equation Models in Unsteady Cellular Flows
2013
Mathematical Modelling of Natural Phenomena
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However, such frequency locking phenomenon disappears in viscous G-equation, and in the inviscid Gequation if time periodic oscillation of the cellular flow is replaced by time stochastic oscillation. ...
We perform a computationl study of front speeds of G-equation models in time dependent cellular flows. ...
When ω is larger, however, the direction of the flow changes so fast in time that the flame front cannot be really wrinkled, and so remains almost planar. ...
doi:10.1051/mmnp/20138312
fatcat:a64xkg7ar5chvbsaayhnbge4dq
Wrinkled flames and geometrical stretch
2011
Physical Review E
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Self-similar evolutions of unstable many-crested patterns are obtained. A link between stretch, nonlinearity, and instability with the cutoff size of the wrinkles in turbulent flames is suggested. ...
Localized wrinkles of thin premixed flames subject to hydrodynamic instability and geometrical stretch of uniform intensity (S) are studied. ...
Self-similar evolutions of unstable many-crest patterns are obtained. A link between stretch, nonlinearity and instability with the cut-off size of wrinkles in turbulent flames is suggested. ...
doi:10.1103/physreve.84.016315
pmid:21867312
fatcat:qa47nh7475eqvf7kqz3ifmnmuy
Rapid bladder cancer cell detection from clinical urine samples using an ultra-thin silicone membrane
2016
The Analyst
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A high-throughput strategy capable of differentiating bladder cancer cells from non-cancerous cells based on their respective cellular traction forces. ...
assistance with cell culture, and Dr Kathy Mach for technical discussion. ...
Acknowledgements We would like to thank Dr Julien Chen for HEK293f cell culture protocols, Dr Joshua Podlevsky for his invaluable technical discussion and reading of the manuscript, Jorge Jimenez for his ...
doi:10.1039/c5an01616a
pmid:26549051
fatcat:z7aqdn7jgjdyjmzfkanovfrrw4
Microgravity experiments and numerical studies on ethanol/air spray flames
2017
Comptes rendus. Mecanique
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In terms of DL-pattern, it seems that such a disorder also plays a role in the design of the wrinkles. ...
The same phenomenon of flame wrinkles and foldings is also observed in the numerical simulations, that permit to identify the front pattern exhibited numerically as of Darrieus-Landau (DL) type. ...
doi:10.1016/j.crme.2016.10.013
fatcat:6qj3ug3oa5c2ngcvuxhjzuxrnq
Page 485 of American Rocket Society. ARS Journal Vol. 26, Issue 6
[page]
1956
American Rocket Society. ARS Journal
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On the Flow Patterns of Flame S. I. PAI
HERE are three different types of flame, (a) laminar
flame, (b) turbulent flame in transition region, and (c) fully developed turbulent flame. ...
length of the mean flow
believe that the high values of I will give continuous com- hustion zones, and low values a “wrinkled” laminar flame. ...
On the Stability of Thermonuclear Burning Fronts in Type Ia Supernovae
2005
International Astronomical Union Colloquium
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The cellular flame stabilization - which is a result of an interplay between the Landau-Darrieus instability and a nonlinear stabilization mechanism - is studied for the case of propagation into quiescent ...
Our simulations indicate that in thermonuclear supernova explosions stable cellular flames develop around the Gibson scale and that a deflagration-to-detonation transition is unlikely to be triggered from ...
In the second, nonlinear stage the flame stabilizes in a cellular pattern. ...
doi:10.1017/s0252921100009386
fatcat:rhiuzvbz5vhlblvtfkpdhn6xxq
Mechanical characterization of elastic membranes: Cell mechanics applications
2007
Applied Physics Letters
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to measure the amplitude field of the wrinkled pattern produced, for instance, by the action of living cell. ...
Wrinkled patterns produced by cells crawling onto elastic membranes provide a useful tool to test living cells' locomotion. ...
FIG. 3: The wrinkle pattern results from the contraction of a single fibroblast which is moving freely on the elastic surface. Left panel; equal thickness fringe pattern modified by wrinkles. ...
doi:10.1063/1.2437672
fatcat:gct4ffy7obe6ve3gy2cqyi5lie
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