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The radiation hydrodynamic code CO5BOLD has been supplemented with the time-dependent treatment of chemical reaction networks. Advection of particle densities due to the hydrodynamic flow field is also included. The radiative transfer is…

天体物理学 · 物理学 2009-11-10 S. Wedemeyer-Boehm , I. Kamp , J. Bruls , B. Freytag

We describe the Stagger Code for simulations of magneto-hydrodynamic (MHD) systems. This is a modular code with a variety of physics modules that will let the user run simulations of deep stellar atmospheres, sunspot formation, stellar…

天体物理仪器与方法 · 物理学 2024-05-07 Robert F. Stein , Åke Nordlund , Remo Collet , Regner Trampedach

This paper describes the design and implementation of our new multi-group, multi-dimensional radiation hydrodynamics (RHD) code Fornax and provides a suite of code tests to validate its application in a wide range of physical regimes.…

天体物理仪器与方法 · 物理学 2019-03-06 M. Aaron Skinner , Joshua C. Dolence , Adam Burrows , David Radice , David Vartanyan

CONTEXT: For more than two decades, stellar atmosphere codes have been used to derive the stellar and wind parameters of massive stars. Although they have become a powerful tool and sufficiently reproduce the observed spectral appearance,…

太阳与恒星天体物理 · 物理学 2017-07-12 Andreas A. C. Sander , Wolf-Rainer Hamann , Helge Todt , Rainer Hainich , Tomer Shenar

Realistic numerical simulations, i.e., those that make minimal use of ad hoc modeling, are essential for understanding the complex turbulent dynamics of the interiors and atmospheres of the Sun and other stars and the basic mechanisms of…

太阳与恒星天体物理 · 物理学 2015-07-30 Alan A. Wray , Khalil Bensassi , Irina N. Kitiashvili , Nagi N. Mansour , Alexander G. Kosovichev

This paper presents a new code for performing multidimensional radiation hydrodynamic (RHD) simulations on parallel computers involving anisotropic radiation fields and nonequilibrium effects. The radiation evolution modules described here…

天体物理学 · 物理学 2009-11-07 John C. Hayes , Michael L. Norman

Modelling the interaction between ionizing photons emitted from massive stars and their environment is essential to further our understanding of galactic ecosystems. We present a hybrid Radiation-Hydrodynamics (RHD) scheme that couples an…

天体物理仪器与方法 · 物理学 2024-04-29 Cheryl S. C. Lau , Maya A. Petkova , Ian A. Bonnell

The emergence of three-dimensional magneto-hydrodynamic (MHD) simulations of stellar atmospheres has sparked a need for efficient radiative transfer codes to calculate detailed synthetic spectra. We present RH 1.5D, a massively parallel…

太阳与恒星天体物理 · 物理学 2015-01-21 Tiago M. D. Pereira , Han Uitenbroek

We introduce a new general-purpose time-dependent ionisation network (IN) and a radiation transport (RT) module in the magneto-hydrodynamic (MHD) code PLUTO. Our ionisation network is reliable for temperatures ranging from 5e3 to 3e8 K, and…

星系天体物理 · 物理学 2021-03-17 Kartick Chandra Sarkar , Amiel Sternberg , Orly Gnat

We present two mixing models for post-processing of 3D hydrodynamic simulations applied to convective-reactive i-process nucleosynthesis in a rapidly accreting white dwarf (RAWD) with $\mathrm{[Fe/H]} = -2.6$, in which H is ingested into a…

太阳与恒星天体物理 · 物理学 2021-03-03 David Stephens , Falk Herwig , Paul Woodward , Pavel Denissenkov , Robert Andrassy , Huaqing Mao

We present a new chemodynamical code based on the adaptive mesh refinement code RAMSES. The new code uses Eulerian hydrodynamics and N-body dynamics in a cosmological framework to trace the production and advection of several chemical…

星系天体物理 · 物理学 2012-02-13 C. Gareth Few , Stephanie Courty , Brad K. Gibson

The design and analysis of high energy density (HED) laser experiments typically rely on radiation hydrodynamics simulations. However, some laser-plasma interaction regimes are not collisional and cannot be adequately modeled with…

等离子体物理 · 物理学 2024-09-27 K. V. Lezhnin , S. R. Totorica , A. S. Hyder , J. Griff-McMahon , M. B. P. Adams , P. Tzeferacos , A. Diallo , W. Fox

We present a numerical code for radiation hydrodynamics designed as a module for the freely available PLUTO code. We adopt a gray approximation and include radiative transfer following a two-moment approach by imposing the M1 closure to the…

地球与行星天体物理 · 物理学 2021-01-20 Julio David Melon Fuksman , Hubert Klahr , Mario Flock , Andrea Mignone

Here we introduce CRASH3, the latest release of the 3D radiative transfer code CRASH. In its current implementation CRASH3 integrates into the reference algorithm the code Cloudy to evaluate the ionisation states of metals,…

宇宙学与河外天体物理 · 物理学 2015-06-12 L. Graziani , A. Maselli , B. Ciardi

A method to engineer the refractive indices of functional materials (TiO2, ZnO, SnO2, SiO2), by nanostructuring in the deep sub-wavelength regime (<20nm), is presented. Block-copolymer templating combined with a wet processing route is used…

介观与纳米尺度物理 · 物理学 2015-05-01 Zsolt Poole , Aidong Yan , Paul Ohodnicki , Kevin Chen

Computational astrophysics routinely combines grid-adaptive capabilities with modern shock-capturing, high resolution spatio-temporal schemes on multi-dimensional hydro- and magnetohydrodynamics. We provide an update on developments within…

天体物理仪器与方法 · 物理学 2023-05-17 Rony Keppens , Beatrice Popescu Braileanu , Yuhao Zhou , Wenzhi Ruan , Chun Xia , Yang Guo , Niels Claes , Fabio Bacchini

I provide a pedagogic review of adaptive mesh refinement (AMR) radiation hydrodynamics (RHD) methods and codes used in simulations of star formation, at a level suitable for researchers who are not computational experts. I begin with a…

天体物理仪器与方法 · 物理学 2015-05-19 Mark R. Krumholz

Turbulent diffuse molecular clouds can exhibit complicated morphologies caused by the interactions among radiation, chemistry, fluids, and fields. We performed full 3D simulations for turbulent diffuse molecular interstellar media,…

星系天体物理 · 物理学 2024-07-17 Nannan Yue , Lile Wang , Thomas Bisbas , Donghui Quan , Di Li

Background: Multi-nucleon transfer reactions have recently attracted attention as a possible path to the synthesis of new neutron-rich heavy nuclei. Purpose: We study transfer reactions involving massive nuclei with the intention of…

核实验 · 物理学 2018-01-25 R. Yanez , W. Loveland

We present an extension of TRAPHIC, the method for radiative transfer of ionising radiation in smoothed particle hydrodynamics simulations that we introduced in Pawlik & Schaye (2008). The new version keeps all advantages of the original…

天体物理仪器与方法 · 物理学 2011-05-10 Andreas H. Pawlik , Joop Schaye