Physics
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..dcm.r1047b&link_type=abstract
American Physical Society, DCOMP Meeting, June 25-28, 2001 Cambridge, Massachusetts Bulletin of the American Physical Society, V
Physics
Scientific paper
We report the development of Djehuty, a highly parallelized, 3D stellar structure code with arbitrary Lagrange/Eulerian grids and full hydrodynamics. Djehuty includes a full physics package using the best available physical data relevant to stellar interior modeling, including the Eggleton EOS, Opal opacities, radiative and convective energy transport, and thermonuclear energy generation with a full reaction network. The onset of convection in the core of pre main sequence and main sequence stars is visible. The effects of solid body rotation as an intial condition on convection is reported. To date we have successfully run Djehuty on a 42 million zone mesh with 440 processors, enabling us to witness the onset of convection in the core of a 4 M_solar main sequence star. Some early scaling results as a function of mesh size and processor count are reported. With Djehuty, we will be able for the first time to model accurately a host of astrophysically important problems in stellar evolution (e.g., convective cores and envelopes, nonconvective mixing, rotation, binary evolution, mass transfer, etc.) over a wide range of stellar masses from brown dwarfs to over 50 M_solar at any point along the HR diagram.
Bazan Grant
Castor John
Dearborn David S. P.
Dossa D. D.
Eastman R.
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