Results 71 to 80 of about 32,275 (199)

Towards Realistic Progenitors of Core-Collapse Supernovae

, 2011
Two-dimensional (2D) hydrodynamical simulations of progenitor evolution of a 23 solar mass star, close to core collapse (about 1 hour, in 1D), with simultaneously active C, Ne, O, and Si burning shells, are presented and contrasted to existing 1D models (
Arnett, Arnett, Arnett, Arnett, Arnett, Arnett, Asida, Bazàn, Brown, Browning, Bruen, Brun, Burrows, Böhm-Vitense, Casey Meakin, Clayton, Cox, Damköhler, Dearborn, Deupree, Deupree, Fryer, Fryer, Fryer, Goldreich, Hoyle, Hoyle, Hughes, Kalogera, Kuhlen, Landau, Ledoux, Lindl, Meakin, Meakin, Meakin, Meakin, Murphy, Nonaka, Nordlund, Porter, Sedov, Smith, Stone, Timmes, Timmes, Turner, Unno, W. David Arnett, Wongwathanarat, Woodward, Young, Zahn   +52 more
core   +1 more source

The Interaction of High-Speed Turbulence with Flames: Global Properties and Internal Flame Structure

, 2011
We study the dynamics and properties of a turbulent flame, formed in the presence of subsonic, high-speed, homogeneous, isotropic Kolmogorov-type turbulence in an unconfined system.
A.Y. Poludnenko, Aspden, Bell, Bilger, Boger, Boris, Buschmann, Colella, Colella, Damköhler, Davidson, Dinkelacker, Driscoll, Dunn, E.S. Oran, Gamezo, Gamezo, Gardiner, Grinstein, Khokhlov, Kolmogorov, Lemaster, Libby, Liu, Mansour, Meneveau, Peters, Porter, Saltzman, Sankaran, Stone, Stone, Stone, Tanahashi, Williams, Zel’dovich, Zel’dovich   +36 more
core   +1 more source

Numerical Investigation of Flow through a Valve during Charge Intake in a DISI -Engine Using Large Eddy Simulation

Energies, 2019
Apart from electric vehicles, most internal combustion (IC) engines are powered while burning petroleum-based fossil or alternative fuels after mixing with inducted air.
Kaushal Nishad, Florian Ries, Yongxiang Li, Amsini Sadiki   +3 more
doaj   +1 more source

The core helium flash revisited III. From Pop I to Pop III stars

, 2010
Degenerate ignition of helium in low-mass stars at the end of the red giant branch phase leads to dynamic convection in their helium cores. One-dimensional (1D) stellar modeling of this intrinsically multi-dimensional dynamic event is likely to be ...
Campbell, Simon W., Kifonidis, Konstantinos, Mocak, Miroslav, Mueller, Ewald   +3 more
core   +1 more source

Beyond Mixing-length Theory: a step toward 321D

, 2015
We examine the physical basis for algorithms to replace mixing-length theory (MLT) in stellar evolutionary computations. Our 321D procedure is based on numerical solutions of the Navier-Stokes equations.
Arnett, W. David, Campbell, Simon W., Lattanzio, John, Meakin, Casey, Mocák, Miroslav, Viallet, Maxime   +5 more
core   +1 more source

Power-Law Wrinkling Turbulence-Flame Interaction Model for Astrophysical Flames

, 2014
We extend a model for turbulence-flame interactions (TFI) to consider astrophysical flames with a particular focus on combustion in type Ia supernovae.
Calder, Alan C., Jackson, Aaron P., Townsley, Dean M.   +2 more
core   +1 more source

Consumption rate characteristics of a fine-scale unburnt mixture in a turbulent jet premixed flame by high repetition rate PLIF and SPIV

Journal of Thermal Science and Technology, 2016
A 10 kHz simultaneous measurement of OH-CH planar laser induced fluorescence (PLIF) and stereoscopic particle image velocimetry (SPIV) is applied to a methane-air turbulent jet premixed flame.
Masayasu SHIMURA, Ayane JOHCHI, Mamoru TANAHASHI   +2 more
doaj   +1 more source

Combustion in thermonuclear supernova explosions

, 2017
Type Ia supernovae are associated with thermonuclear explosions of white dwarf stars. Combustion processes convert material in nuclear reactions and release the energy required to explode the stars.
A Liñan, A Maier, AC Calder, AM Khokhlov, AM Khokhlov, AM Khokhlov, AM Lisewski, AP Jackson, AP Jackson, AY Poludnenko, CA Meakin, CJ Hansen, D Kasen, DM Townsley, DM Townsley, EF Toro, EP Hicks, F Ciaraldi-Schoolmann, F Ciaraldi-Schoolmann, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FK Röpke, FX Timmes, FX Timmes, G Damköhler, GC Jordan IV, GC Jordan IV, GC Jordan IV, GI Barenblatt, GJ Sharpe, I Golombek, IR Seitenzahl, IR Seitenzahl, JC Niemeyer, JC Niemeyer, JHS Lee, JR Boisseau, KS Marquardt, LD Landau, M Fink, M Fink, M Kromer, M Reinecke, M Reinecke, M Reinecke, N Peters, N Vladimirova, R Moll, R Pakmor, R Pakmor, R Pakmor, S Osher, SA Sim, SE Woosley, ST Ohlmann, VN Gamezo, VN Gamezo, VN Gamezo, W Döring, W Fickett, W Schmidt, W Schmidt, WR Hix, YB Zel’dovich, YB Zel’dovich, YB Zel’dovich   +74 more
core   +1 more source

Numerical investigation on the combustion characteristics of turbulent premixed ammonia/air flames stabilized by a swirl burner

Journal of Fluid Science and Technology, 2016
The present study is dedicated to understand the combustion characteristics of turbulent premixed swirl flames for ammonia (NH3)/air mixture in gas turbine combustors by a numerical investigation.
Kapuruge Don Kunkuma Amila SOMARATHNE, Akihiro HAYAKAWA, Hideaki KOBAYASHI   +2 more
doaj   +1 more source

Comparison of Presumed PDF Models of Turbulent Flames

Journal of Combustion, 2012
Over the past years, the use of a presumed probability density function (PDF) for combustion progress variable or/and mixture fraction has been becoming more and more popular approach to average reaction rates in premixed and partially premixed turbulent
Chen Huang, Andrei N. Lipatnikov
doaj   +1 more source