Living reviews in computational astrophysics最新文献_第2页

Physical, numerical, and computational challenges of modeling neutrino transport in core-collapse supernovae 核心坍缩超新星中中微子输运建模的物理、数值和计算挑战

Living reviews in computational astrophysics Pub Date : 2020-11-30 DOI: 10.1007/s41115-020-00010-8

A. Mezzacappa, E. Endeve, O. E. Bronson Messer, S. Bruenn

引用次数: 2

Correction to: MHD turbulence 修正为：MHD湍流

Living reviews in computational astrophysics Pub Date : 2020-06-08 DOI: 10.1007/s41115-020-00009-1

A. Beresnyak

引用次数: 0

Multi-scale simulations of particle acceleration in astrophysical systems 天体物理系统中粒子加速的多尺度模拟

Living reviews in computational astrophysics Pub Date : 2020-03-23 DOI: 10.1007/s41115-020-0007-6

A. Marcowith, G. Ferrand, M. Grech, Z. Meliani, I. Plotnikov, R. Walder

引用次数: 0

MHD turbulence MHD湍流

Living reviews in computational astrophysics Pub Date : 2019-09-10 DOI: 10.1007/s41115-019-0005-8

A. Beresnyak

引用次数: 30

Vlasov methods in space physics and astrophysics. 空间物理学和天体物理学中的弗拉索夫方法。

Living reviews in computational astrophysics Pub Date : 2018-01-01 Epub Date: 2018-08-16 DOI: 10.1007/s41115-018-0003-2

Minna Palmroth, Urs Ganse, Yann Pfau-Kempf, Markus Battarbee, Lucile Turc, Thiago Brito, Maxime Grandin, Sanni Hoilijoki, Arto Sandroos, Sebastian von Alfthan

{"title":"Vlasov methods in space physics and astrophysics.","authors":"Minna Palmroth, Urs Ganse, Yann Pfau-Kempf, Markus Battarbee, Lucile Turc, Thiago Brito, Maxime Grandin, Sanni Hoilijoki, Arto Sandroos, Sebastian von Alfthan","doi":"10.1007/s41115-018-0003-2","DOIUrl":"https://doi.org/10.1007/s41115-018-0003-2","url":null,"abstract":"This paper reviews Vlasov-based numerical methods used to model plasma in space physics and astrophysics. Plasma consists of collectively behaving charged particles that form the major part of baryonic matter in the Universe. Many concepts ranging from our own planetary environment to the Solar system and beyond can be understood in terms of kinetic plasma physics, represented by the Vlasov equation. We introduce the physical basis for the Vlasov system, and then outline the associated numerical methods that are typically used. A particular application of the Vlasov system is Vlasiator, the world's first global hybrid-Vlasov simulation for the Earth's magnetic domain, the magnetosphere. We introduce the design strategies for Vlasiator and outline its numerical concepts ranging from solvers to coupling schemes. We review Vlasiator's parallelisation methods and introduce the used high-performance computing (HPC) techniques. A short review of verification, validation and physical results is included. The purpose of the paper is to present the Vlasov system and introduce an example implementation, and to illustrate that even with massive computational challenges, an accurate description of physics can be rewarding in itself and significantly advance our understanding. Upcoming supercomputing resources are making similar efforts feasible in other fields as well, making our design options relevant for others facing similar challenges.","PeriodicalId":74085,"journal":{"name":"Living reviews in computational astrophysics","volume":"4 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s41115-018-0003-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36895223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 108

Higher-order accurate space-time schemes for computational astrophysics-Part I: finite volume methods. 计算天体物理学的高阶精确时空方案-第一部分:有限体积方法。

Living reviews in computational astrophysics Pub Date : 2017-01-01 Epub Date: 2017-12-11 DOI: 10.1007/s41115-017-0002-8

Dinshaw S Balsara

{"title":"Higher-order accurate space-time schemes for computational astrophysics-Part I: finite volume methods.","authors":"Dinshaw S Balsara","doi":"10.1007/s41115-017-0002-8","DOIUrl":"https://doi.org/10.1007/s41115-017-0002-8","url":null,"abstract":"As computational astrophysics comes under pressure to become a precision science, there is an increasing need to move to high accuracy schemes for computational astrophysics. The algorithmic needs of computational astrophysics are indeed very special. The methods need to be robust and preserve the positivity of density and pressure. Relativistic flows should remain sub-luminal. These requirements place additional pressures on a computational astrophysics code, which are usually not felt by a traditional fluid dynamics code. Hence the need for a specialized review. The focus here is on weighted essentially non-oscillatory (WENO) schemes, discontinuous Galerkin (DG) schemes and PNPM schemes. WENO schemes are higher order extensions of traditional second order finite volume schemes. At third order, they are most similar to piecewise parabolic method schemes, which are also included. DG schemes evolve all the moments of the solution, with the result that they are more accurate than WENO schemes. PNPM schemes occupy a compromise position between WENO and DG schemes. They evolve an Nth order spatial polynomial, while reconstructing higher order terms up to Mth order. As a result, the timestep can be larger. Time-dependent astrophysical codes need to be accurate in space and time with the result that the spatial and temporal accuracies must be matched. This is realized with the help of strong stability preserving Runge-Kutta schemes and ADER (Arbitrary DERivative in space and time) schemes, both of which are also described. The emphasis of this review is on computer-implementable ideas, not necessarily on the underlying theory.","PeriodicalId":74085,"journal":{"name":"Living reviews in computational astrophysics","volume":"3 1","pages":"2"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s41115-017-0002-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36870738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modelling of stellar convection. 恒星对流的建模。

Living reviews in computational astrophysics Pub Date : 2017-01-01 Epub Date: 2017-07-18 DOI: 10.1007/s41115-017-0001-9

Friedrich Kupka, Herbert J Muthsam

{"title":"Modelling of stellar convection.","authors":"Friedrich Kupka, Herbert J Muthsam","doi":"10.1007/s41115-017-0001-9","DOIUrl":"https://doi.org/10.1007/s41115-017-0001-9","url":null,"abstract":"The review considers the modelling process for stellar convection rather than specific astrophysical results. For achieving reasonable depth and length we deal with hydrodynamics only, omitting MHD. A historically oriented introduction offers first glimpses on the physics of stellar convection. Examination of its basic properties shows that two very different kinds of modelling keep being needed: low dimensional models (mixing length, Reynolds stress, etc.) and \"full\" 3D simulations. A list of affordable and not affordable tasks for the latter is given. Various low dimensional modelling approaches are put in a hierarchy and basic principles which they should respect are formulated. In 3D simulations of low Mach number convection the inclusion of then unimportant sound waves with their rapid time variation is numerically impossible. We describe a number of approaches where the Navier-Stokes equations are modified for their elimination (anelastic approximation, etc.). We then turn to working with the full Navier-Stokes equations and deal with numerical principles for faithful and efficient numerics. Spatial differentiation as well as time marching aspects are considered. A list of codes allows assessing the state of the art. An important recent development is the treatment of even the low Mach number problem without prior modification of the basic equation (obviating side effects) by specifically designed numerical methods. Finally, we review a number of important trends such as how to further develop low-dimensional models, how to use 3D models for that purpose, what effect recent hardware developments may have on 3D modelling, and others.","PeriodicalId":74085,"journal":{"name":"Living reviews in computational astrophysics","volume":"3 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s41115-017-0001-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36870737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 51

Grid-based Methods in Relativistic Hydrodynamics and Magnetohydrodynamics. 基于网格的相对论流体力学和磁流体力学方法。

Living reviews in computational astrophysics Pub Date : 2015-01-01 Epub Date: 2015-12-22 DOI: 10.1007/lrca-2015-3

José María Martí, Ewald Müller

引用次数: 66

SPH Methods in the Modelling of Compact Objects 紧凑物体建模中的SPH方法

Living reviews in computational astrophysics Pub Date : 2014-06-17 DOI: 10.1007/lrca-2015-1

S. Rosswog

引用次数: 56

Large Eddy Simulations in Astrophysics 天体物理学中的大涡模拟

Living reviews in computational astrophysics Pub Date : 2014-04-09 DOI: 10.1007/lrca-2015-2

W. Schmidt

引用次数: 30