Results 31 to 40 of about 1,310 (168)
Numerical simulation of the dynamics of sedimentary river beds with a stochastic Exner equation
ESAIM: Proceedings and Surveys, 2015 At the scale of a river reach, the dynamics of the river bed is typically modelled by Exner equation (conservation of the solid mass) with an empirical solid flux of transported sediments, which is a simple deterministic algebraic ...
Audusse Emmanuel +4 more
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Hydrodynamical Simulations of Recollimation Shocks within Relativistic Astrophysical Jets
Galaxies, 2018 Astrophysical jets launched from active galactic nuclei can remain tightly collimated over large distances due, in part, to recollimation shocks.
Christopher D. Kaye +2 more
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Scalability of Hydrodynamic Simulations
, 2009 Many hydrodynamic processes can be studied in a way that is scalable over a vastly relevant physical parameter space. We systematically examine this scalability, which has so far only briefly discussed in astrophysical literature. We show how the scalability is limited by various constraints imposed by physical processes and initial conditions.
Tang, Shikui, Wang, Q. Daniel
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Merger-tree-based Galaxy Matching: A Comparative Study across Different Resolutions
The Astrophysical JournalWe introduce a novel halo/galaxy matching technique between two cosmological simulations with different resolutions, which utilizes the positions and masses of halos along their subhalo merger tree. With this tool, we conduct a study of resolution biases
Minyong Jung +5 more
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Guangqi: A 2D Radiation Hydrodynamic Code with Realistic Equations of State
The Astrophysical Journal Supplement SeriesWe present Guangqi , a new 2D, finite-volume radiation hydrodynamics code designed for high-performance astrophysical simulations. The code simultaneously resolves the hydrodynamic equations for complex equations of state (EoS) and implicit radiation ...
Zhuo Chen, Xue-Ning Bai
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Hydrodynamic Simulations of Astrophysical Jets [PDF]
Proceedings of XII Multifrequency Behaviour of High Energy Cosmic Sources Workshop — PoS(MULTIF2017), 2018 {We present recent results of our three-dimensional (3-D) simulations of astrophysical jets. These efforts use the the PLUTO code (Mignone \textit{et al. 2007}) run in a highly parallel environment for the hydrodynamic, magneto-hydrodynamic (MHD), relativistic hydrodynamic (RHD), and relativistic, magnetohydrodynamic (RMHD) simulations.
James Beall +6 more
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The GHOSDT Simulations: I. Magnetic Support in Gas-rich Disks
The Astrophysical JournalGalaxies at redshift z ∼ 1–2 display high star formation rates with elevated cold gas fractions and column densities. Simulating a self-regulated interstellar medium (ISM) in a hydrodynamical, self-consistent context has proven challenging due to strong ...
Alon Gurman +3 more
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Impacts of the Metagalactic Ultraviolet Background on Circumgalactic Medium Absorption Systems
The Astrophysical JournalAmong the many different pieces of physics that go into simulations of the circumgalactic medium (CGM), the metagalactic ultraviolet background (UVB) plays a significant role in determining the ionization state of different metal species.
Elias Taira +7 more
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Extracting the Temperature Analytically in Hydrodynamics Simulations with Gas and Radiation Pressure
The Astrophysical JournalNumerical hydrodynamics simulations of gases dominated by ideal, nondegenerate matter pressure and thermal radiation pressure in equilibrium entail finding the temperature as part of the evolution.
Thomas W. Baumgarte, Stuart L. Shapiro
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Can Cosmological Simulations Reproduce the Spectroscopically Confirmed Galaxies Seen at z ≥ 10?
The Astrophysical Journal Letters, 2023 Recent photometric detections of extreme ( z > 10) redshift galaxies from the JWST have been shown to be in strong tension with existing simulation models for galaxy formation and in the most acute case, in tension with ΛCDM itself.
B. W. Keller +3 more
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