Changes between Version 8 and Version 9 of u/lchamandy/2017-04-17
- Timestamp:
- 04/14/17 15:01:08 (8 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
u/lchamandy/2017-04-17
v8 v9 20 20 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Ambp038/rho1d_Ambp038.gif 1d density] 21 21 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Ambp038/P1d_Ambp038.gif 1d pressure]\\ 22 DESCRIPTION: Star expands and contracts, becoming first more diamond-shaped and then more square-shaped. 22 23 23 24 (ii) Isothermal hydrostatic atmosphere (Atm001, 4.1 hrs on bluehive standard 120 cores)\\ 24 25 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm001/rho3doldrange_Atm001.gif 2d density] 25 26 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm001/rho2dv1e6_Atm001.gif 2d density and velocity]\\ 27 DESCRIPTION: Star becomes unstable after about 1 dynamical time. 26 28 27 29 '''b) Multipole expansion BCs, no velocity damping'''\\ … … 32 34 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp010/rho1d_Damp010.gif 1d density] 33 35 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp010/P1d_Damp010.gif 1d pressure]\\ 36 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 34 37 35 38 (ii) Isothermal hydrostatic atmosphere (Atm003)\\ 36 39 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm003/rho2d_Atm003.gif 2d density] 37 40 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm003/rho2dv1e6_Atm003.gif 2d density and velocity]\\ 41 DESCRIPTION: Star becomes unstable after about 1 dynamical time. 38 42 39 43 '''Comparison with (a) on left and (b) on right'''\\ … … 73 77 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp010/rho1d_Damp010.gif 1d density] 74 78 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp010/P1d_Damp010.gif 1d pressure]\\ 79 DESCRIPTION: Star becomes square-shaped, and unstable after a few dynamical times. 75 80 76 81 (ii) Isothermal hydrostatic atmosphere (Atm003)\\ 77 82 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm003/rho2d_Atm003.gif 2d density] 78 83 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm003/rho2dv1e6_Atm003.gif 2d density and velocity]\\ 84 DESCRIPTION: Star becomes unstable after about 1 dynamical time. 79 85 80 86 '''b) Fixed profile ($\rho$, $P$, $\bm{v}=0$) on boundary hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 85 91 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp017/rho1d_Damp017.gif 1d density] 86 92 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp017/P1d_Damp017.gif 1d pressure]\\ 93 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 87 94 88 95 (ii) Isothermal hydrostatic atmosphere (Atm004)\\ 89 96 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm004/rho2d_Atm004.gif 2d density] 90 97 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm004/rho2dv1e6_Atm004.gif 2d density and velocity]\\ 98 DESCRIPTION: Star becomes unstable after about 1 dynamical time. 91 99 92 100 '''c) Fixed profile outside sphere (of radius $5\times10^{12}$ cm) hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 97 105 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp018/rho1d_Damp018.gif 1d density] 98 106 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp018/P1d_Damp018.gif 1d pressure]\\ 107 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 99 108 100 109 (ii) Isothermal hydrostatic atmosphere (Atm008)\\ … … 102 111 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm008/rho2dv1e6_Atm008.gif 2d density and velocity] 103 112 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm008/rho2d_Atm008.gif 2d density extended range]\\ 113 DESCRIPTION: Star becomes unstable after about 1 dynamical time. 104 114 105 115 '''d) Fixed pressure on boundary with rho and veloc extrapolated hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 107 117 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp023/rho2d_Damp023.gif 2d density] 108 118 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp023/rho2dv1e6_Damp023.gif 2d density and velocity]\\ 119 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 109 120 110 121 '''e) Fixed pressure and density on boundary with veloc extrapolated hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 112 123 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp025/rho2d_Damp025.gif 2d density] 113 124 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp025/rho2dv1e6_Damp025.gif 2d density and velocity]\\ 125 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 114 126 115 127 '''f) Fixed pressure outside spherical region with rho and veloc extrapolated hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ 116 128 (i) Constant ambient pressure and density (Damp024, 7.7 hrs on comet compute, 576 cores)\\ 117 129 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp024/rho2dv1e6_Damp024.gif 2d density and velocity]\\ 130 DESCRIPTION: Ambient medium becomes unstable and instabilities propagate inward after a few dynamical times, destroying star. 118 131 119 132 (ii) Isothermal hydrostatic atmosphere (pending on stampede) (Atm010)\\ 120 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm010/rho2dold_Atm010.gif 2d density]121 133 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm010/rho2dv1e6_Atm010.gif 2d density and velocity]\\ 134 DESCRIPTION: Very large velocities at early times at corners of grid. 122 135 123 136 '''g) Fixed profile outside sphere of radius $4\times10^{12}$ cm instead of $5\times10^{12}$ cm, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 125 138 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp026/rho2d_Damp026.gif 2d density] 126 139 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp026/rho2dv1e6_Damp026.gif 2d density and velocity]\\ 140 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 127 141 128 142 '''h) Fixed pressure outside sphere ($r=4\times10^{12}$ cm) with rho and veloc extrapolated hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 130 144 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp027/rho2d_Damp027.gif 2d density] 131 145 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp027/rho2dv1e6_Damp027.gif 2d density and velocity]\\ 146 DESCRIPTION: Ambient medium becomes unstable and instabilities propagate inward after a few dynamical times, destroying star. 132 147 133 148 '''i) Reflecting hydro BCs, Multipole expansion Poisson BCs, no velocity damping'''\\ … … 135 150 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp028/rho2d_Damp028.gif 2d density] 136 151 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp028/rho2dv1e6_Damp028.gif 2d density and velocity]\\ 152 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 137 153 138 154 (ii) Isothermal hydrostatic atmosphere, no velocity damping (Atm011, 11 hrs on bluehive standard, 120 cores)\\ … … 141 157 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm011/rho2d_extended_Atm011.gif 2d density extended] 142 158 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm011/rho2dv1e6_extended_Atm011.gif 2d density and velocity extended]\\ 159 DESCRIPTION: Star preserves its shape rather well but region exterior to star begins to be unstable after a few dynamical times. 143 160 144 161 '''Comparison with (a) on left and (b) on right'''\\ … … 198 215 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp017/rho1d_Damp017.gif 1d density] 199 216 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp017/P1d_Damp017.gif 1d pressure]\\ 217 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 200 218 201 219 (ii) Isothermal hydrostatic atmosphere (Atm004)\\ 202 220 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm004/rho2d_Atm004.gif 2d density] 203 221 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm004/rho2dv1e6_Atm004.gif 2d density and velocity]\\ 222 DESCRIPTION: Star becomes unstable after about 1 dynamical time. 204 223 205 224 '''b) Fixed profile on boundary hydro BCs, Multipole expansion Poisson BCs, Velocity damping with $\tau=1\times10^5$ s'''\\ … … 210 229 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp021/rho1d_Damp021.gif 1d density] 211 230 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp021/P1d_Damp021.gif 1d pressure]\\ 231 DESCRIPTION: Square-shaped morphology and velocities reduced from case III(a), but still begins to be unstable after a few dynamical times. 212 232 213 233 '''c) Fixed profile outside sphere hydro BCs, Multipole expansion Poisson BCs (same as II(c) above), no velocity damping'''\\ … … 218 238 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp018/rho1d_Damp018.gif 1d density] 219 239 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp018/P1d_Damp018.gif 1d pressure]\\ 240 DESCRIPTION: Star becomes square-shaped, starts to become unstable after a few dynamical times. 220 241 221 242 (ii) Isothermal hydrostatic atmosphere (Atm008)\\ 222 243 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm008/rho2d_Atm008.gif 2d density] 223 244 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm008/rho2dv1e6_Atm008.gif 2d density and velocity]\\ 245 DESCRIPTION: Ambient medium becomes unstable after about 1 dynamical time. 224 246 225 247 '''d) Fixed profile outside sphere hydro BCs, Multipole expansion Poisson BCs, Velocity damping with $\tau=1\times10^5$ s'''\\ … … 230 252 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp022/rho1d_Damp022.gif 1d density] 231 253 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp022/P1d_Damp022.gif 1d pressure]\\ 254 DESCRIPTION: Square-shaped morphology and velocities reduced from case III(a), but still begins to be unstable after a few dynamical times. 232 255 233 256 (ii) Isothermal hydrostatic atmosphere (Atm009)\\ … … 235 258 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm009/rho2dv1e6_Atm009.gif 2d density and velocity (10x smaller arrows)] 236 259 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm009/rho2dv1e6_extended_Atm009.gif 2d density and velocity (extended color bar, smaler arrows)]\\ 260 DESCRIPTION: Rather steady and preserves shape rather well at ~1 dynamical time. 237 261 238 262 '''e) Reflecting hydro BCs, Multipole expansion Poisson BCs, Velocity damping with $\tau=1\times10^5$ s'''\\ 239 240 263 (i) Constant ambient pressure and density (Damp029, 6.9 hrs on bluehive standard 120 cores)\\ 241 264 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp029/rho2d_Damp029.gif 2d density] 242 265 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Damp029/rho2dv1e7_Damp029.gif 2d density and velocity]\\ 266 DESCRIPTION: Square-shaped morphology and velocities reduced from case III(a), but still begins to be unstable after a few dynamical times. 243 267 244 268 (ii) Isothermal hydrostatic atmosphere (Atm012, 11.5 hrs on bluehive standard, 120 cores)\\ … … 247 271 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm012/rho2d_extended_Atm012.gif 2d density (extended color bar)] 248 272 [http://www.pas.rochester.edu/~lchamandy/Graphics/RGB/Post-sink_particle/Post-modified_Lane_Emden/Atm012/rho2dv1e6_extended_Atm012.gif 2d density and velocity (extended color bar, 10x smaller arrows)]\\ 273 DESCRIPTION: Preserves shape rather well, but instabilities build up in ambient medium and propagate inward after a few dynamical times. 249 274 250 275 '''Comparison with (a) on left and (b) on right'''\\