|
Cococubed.com
|
| Coggeshall Problem #8 |
Home
Teaching materials
Astronomy research
Astronomy codes
... Stellar equation of states
... EOS with ionization
... EOS for supernovae
... Chemical potentials
... Stellar atmospheres
... Voigt Function
... Polytropic stars
... Cold white dwarfs
... Hotter white dwarfs
... Cold neutron stars
... Stellar opacities
... Neutrino energy loss rates
... Ephemeris routines
... Fermi-Dirac functions
... Galactic chemical evolution
... Nuclear reaction networks
... Nuclear statistical equilibrium
... Laminar deflagrations
... CJ detonations
... ZND detonations
... Fitting to conic sections
... Unusual linear algebra
... Derivatives on uneven grids
... Pentadiagonal solver
... Quadratics, Cubics, Quartics
... Supernova light curves
... Exact Riemann solutions
... 1D PPM Hydrodynamics
... Verification problems
... EZ stellar evolution
... FLASH code
... Mesa code
Astronomy talks
Astronomy images
Outreach
Family album
Bicycle adventures
Artwork
Contact us:
J.D. Maldonado
F.X.Timmes, my vitae
Coggeshall (1991) published a collection of analytic self-similar test problems, and ``Coggeshall #8'' or ``Cog8'' is the eighth one listed. The solution to this problem represents an adiabatic expansion plus heat conduction. The heat conduction's area weighted flux on each cell face is equal. That is, conduction moves as much energy into a cell as it removes. Thus, the answers with and without conduction look much the same. This code released under LA-CC-05-101.
 radial heat & fluid flow |
 analytical and numerical |
 convergence study |
 evolution movie |
cog8.f solves Coggeshall problem #8 |
 evolution movie |
Density uniform mesh:
 density 200x200 cells |
 density 400x400 cells |
 density 800x800 cells |
 density error 200x200 cells |
 density error 400x400 cells |
 density error 800x800 cells |
 density asymmetry 200x200 |
 density asymmetry 400x400 |
 density asymmetry 800x800 |
Temperature and material speed on uniform mesh:
 temperature asymmetry 200x200 |
 temperature asymmetry 400x400 |
 temperature asymmetry 800x800 |
 speed asymmetry 200x200 |
 speed asymmetry 400x400 |
 speed asymmetry 800x800 |
Density adaptive mesh:
 density 200x200 cells |
 density 400x400 cells |
 density 800x800 cells |
 density error 200x200 cells |
 density error 400x400 cells |
 density error 800x800 cells |
 density asymmetry 200x200 |
 density asymmetry 400x400 |
 density asymmetry 800x800 |