AstroPhysical Applications

Type Ia Supernovae

Asymmetric Deflagration Models

movie(s)	description	see also:
SNIa_off_1.6km_3D_20040110_May_i.avi SNIa_off_1.6km_3D_20040110.avi SNIa_off_1.6km_3D_20040110.mpg	Evolution of the flame surface in fully 3-D hi-resolution model of a slightly off-center ignition. The second movie (.avi or .mpg) shows the structure of the flame at the end of the simulation	The paper "Type Ia supernovae: an asymmetric deflagration Model Calder, A.C., Plewa, T., Vladimirova, N., Lamb, D.Q., Truran, J.W. 2004, ApJ Letters, submitted astro-ph/0405162
SNIa_center_5km_3D_20030920.avi SNIa_center_5km_3D_20030920.mpg	One of the first whole-star models of slightly off-center supernova ignition

Gravitationally Confined Detonation Models

movie(s)	description	see also:
SNIa_20040320_off_8km_logd_666.mpg SNIa_20040320_off_8km_logd+vvec_back_666.mpg SNIa_20040320_off_8km_logt+vvec_back.mpg	Evolution of gas, density, temperature, and velocity field in an off-center ignition scenario leading to a gravitationally confined detonation	The paper Type Ia supernova explosion: Gravitationally Confined Detonation Plewa, T., Calder, A.C., Lamb, D.Q. 2004, ApJ, 612, L37 ApJL, astro-ph/0405163
SNIa_off_10km_size8_mpole10_dens_zoom_IBPB_666.mpg	verification test of the gravitational potential solver. Use of a large number of multiple moments in the expression is required to conserve linear momentum in the system. Nuclear burning is included only in the deflagration phase.
SNIa_off_10km_dens.mpg	when spherically symmetric potential is assumed, the linear momentum is no longer conserved. Notice that the bulk of the star is "floating" upwards in the domain. This behavior is unphysical

Classical Nova Explosions

movie(s)	description	see also:
denvel.mpg	resonant gravity waves breaking on white dwarfs	Alan Calder's talk from the International Conference on Classical Nova Explosions, May 20-24, 2002
nova_vel_10_small.mpg	development of convection in simulation of a nova envelope. The convection is seeded with 10% perturbation of temperature in one spot. The red contour indicates an increase of 5% over the background. The black line marks the surface of the underlying white dwarf.

Cellular Detonation

movie(s)	description	see also:
Pres.solid2_cut1.qt	cellular detonation	The talk given at Supercomputing 2000, in the Gordon Bell award session. It is a general overview of the FLASH code (at the time), and a discussion of the simulation problem which produced our performance results -- a 3d cellular detonation simulation run on all of Blue Pacific (although the performance results were run on all of ASCI Red.)

Basic Physics

DNS Studies of Premixed Flames using Advection-Reaction-Diffusion Model

movie(s)	description	see also:
chaos_v01.mpg chaos_v08.mpg	the flame front distorted by prescribed flow with turbulent spectrum. Depending on flow intensity, we observe flame brush of different thickness and topology, and different effective flame speed.	dns burn home page
vortex1.avi vortex2.avi vortex3.avi   vortex1.mov vortex2.mov vortex3.mov vortex4.mov	The flame is propagating in a cellular flow. Depending on the ratio of cell size to flame thickness, geometric optics and diffusive regimes can be observed. Flame acceleration in the geometrical optics regime is a function of flow velocity only, while in diffusive regime it also depends on cell size.
L04v600-r1.avi L04v600-r2.avi L04v600-t1.avi L04v600-t2.avi L04v800-r1.avi L04v800-r2.avi L04v800-t1.avi L04v800-t2.avi   L04v600-r1.mov L04v600-r2.mov L04v600-t1.mov L04v600-t2.mov L04v800-r1.mov L04v800-r2.mov L04v800-t1.mov L04v800-t2.mov	The initial band of hot material is distorted by cellular flow. We choose the reaction rate which allows burning only if the temperature is higher than some threshold value. The flow redistributes hot material, so that some of it falls under the threshold and no longer contributes to the reaction. If the flow is fast enough it can quench the burning. In the movies, the temperature above threshold is shown with red and yellow part of the colormap.
L4v13.avi L4v14.avi L8v10.avi L8v12.avi L8v20.avi L8v40.avi   L4v13.mov L4v14.mov L8v10.mov L8v12.mov L8v20.mov L8v40.mov	The initial band of hot material is distorted by shear flow. We choose the reaction rate which allows burning only if the temperature is higher than some threshold value. The flow redistributes hot material, so that some of it falls under the threshold and no longer contributes to the reaction. If the flow is fast enough it can quench the burning. In the movies, the temperature above threshold is shown with red and yellow part of the colormap.

Validation

Rayleigh-Taylor Instability

movie(s)	description	see also:
6lev3d.mpg	high-resolution single-mode 3d Rayleigh-Taylor simulation	Alan Calder's presentation at Lawrence Livermore National Laboratories, Feb 2, 2002
alpha_rhoave.mpg	horizontally averaged density from a 3-D Rayleigh-Taylor instability simulation with a multi-mode initial perturbation. The average density illustrates the width of the mixed region, seen as the deviation from the initial profile.
dens2d9lev.mpg	very high-resolution single-mode 2-D Rayleigh-Taylor simulation