Zobrazeno 1 - 10
of 333
pro vyhledávání: '"Bell, J B"'
We simulate phase separated fluids using the Cahn-Hillard fluctuating hydrodynamic (CH-FHD) model and measure the statistical properties of capillary waves generated by thermal fluctuations. Our measurements are in good agreement with stochastic lubr
Externí odkaz:
http://arxiv.org/abs/2404.01444
Autor:
Zingale, M., Almgren, A. S., Sazo, M. Barrios, Bell, J. B., Eiden, K., Harpole, A., Katz, M. P., Nonaka, A. J., Willcox, D. E., Zhang, W.
We describe recent developments to the Castro astrophysics simulation code, focusing on new features that enable our simulations of X-ray bursts. Two highlights of Castro's ongoing development are the new integration technique to couple hydrodynamics
Externí odkaz:
http://arxiv.org/abs/1910.12578
Simulations in stellar astrophysics involve the coupling of hydrodynamics and nuclear reactions under a wide variety of conditions, from simmering convective flows to explosive nucleosynthesis. Numerical techniques such as operator splitting (most no
Externí odkaz:
http://arxiv.org/abs/1908.03661
Autor:
Zingale, M., Eiden, K., Cavecchi, Y., Harpole, A., Bell, J. B., Chang, M., Hawke, I., Katz, M. P., Malone, C. M., Nonaka, A. J., Willcox, D. E., Zhang, W.
We discuss the challenges of modeling X-ray bursts in multi-dimensions, review the different calculations done to date, and discuss our new set of ongoing simulations. We also describe algorithmic improvements that may help in the future to offset so
Externí odkaz:
http://arxiv.org/abs/1810.04720
Publikováno v:
J. Fluid Mech. 871 (2019) 1-21
Three-dimensional numerical simulations of canonical statistically-steady statistically-planar turbulent flames have been used in an attempt to produce distributed burning in lean methane and hydrogen flames. Dilatation across the flame means that ex
Externí odkaz:
http://arxiv.org/abs/1806.09865
Autor:
Zingale, M., Almgren, A. S., Sazo, M. G. Barrios, Beckner, V. E., Bell, J. B., Friesen, B., Jacobs, A. M., Katz, M. P., Malone, C. M., Nonaka, A. J., Willcox, D. E., Zhang, W.
Publikováno v:
Journal of Physics: Conference Series, 2018, volume 1031, 012024
We describe the AMReX suite of astrophysics codes and their application to modeling problems in stellar astrophysics. Maestro is tuned to efficiently model subsonic convective flows while Castro models the highly compressible flows associated with st
Externí odkaz:
http://arxiv.org/abs/1711.06203
Akademický článek
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Publikováno v:
Commun. Appl. Math. Comput. Sci. 12 (2017) 25-50
Spectral deferred corrections (SDC) is an iterative approach for constructing higher- order accurate numerical approximations of ordinary differential equations. SDC starts with an initial approximation of the solution defined at a set of Gaussian or
Externí odkaz:
http://arxiv.org/abs/1504.01329
We formulate and study computationally the fluctuating compressible Navier-Stokes equations for reactive multi-species fluid mixtures. We contrast two different expressions for the covariance of the stochastic chemical production rate in the Langevin
Externí odkaz:
http://arxiv.org/abs/1503.07478
We develop a low Mach number formulation of the hydrodynamic equations describing transport of mass and momentum in a multispecies mixture of incompressible miscible liquids at specified temperature and pressure that generalizes our prior work on ide
Externí odkaz:
http://arxiv.org/abs/1412.6503