https://numericastronomy.com/tags/numericaln-body/Recent content in Numerical:N-Body on NumericAstronomyHugozh-cnFri, 24 Jul 2026 00:00:00 +0000https://numericastronomy.com/posts/2026-06-25-hydrodynamic-02/Thu, 25 Jun 2026 00:00:00 +0000https://numericastronomy.com/posts/2026-06-25-hydrodynamic-02/<div class="en-block"> <div class="en-zh">引力是驱动结构形成的基本力，因此大多数宇宙学模拟的核心构建模块便是 $N$ 体程序（关于替代方法的讨论，参见<sup class="citation" data-ref="K. Yoshikawa, N. Yoshida, and M. Umemura, Direct Integration of the Collisionless Boltzmann Equation in Six-dimensional Phase Space: Self-gravitating Systems, ApJ. 762, 116, (2013)." onclick="event.stopPropagation();var t=this;var ct=document.querySelector('.cite-tooltip');if(ct)ct.remove();navigator.clipboard.writeText(this.getAttribute('data-ref')).then(function(){t.classList.add('copied');setTimeout(function(){t.classList.remove('copied')},1200)});event.preventDefault()"><a href="#ref-Yoshikawa2013" id="cite-Yoshikawa2013">[1]</a></sup> ）。$N$ 体程序的目标是研究自引力、无碰撞系统的非线性动力学演化（综述见<sup class="citation" data-ref="K. Dolag, S. Borgani, S. Schindler, A. Diaferio, and A. M. Bykov, Simulation Techniques for Cosmological Simulations, Space Sci. Rev. 134, 229–268 (Feb., 2008). https://doi.org/10.1007/s11214-008-9316-5." onclick="event.stopPropagation();var t=this;var ct=document.querySelector('.cite-tooltip');if(ct)ct.remove();navigator.clipboard.writeText(this.getAttribute('data-ref')).then(function(){t.classList.add('copied');setTimeout(function(){t.classList.remove('copied')},1200)});event.preventDefault()"><a href="#ref-Dolag2008" id="cite-Dolag2008">[2]</a></sup> ,<sup class="citation" data-ref="V. Springel, High Performance Computing and Numerical Modelling, Star Formation in Galaxy Evolution: Connecting Numerical Models to Reality, Saas-Fee Advanced Course, Volume 43. ISBN 978-3-662-47889-9. Springer-Verlag Berlin Heidelberg, 2016, p. 251. 43, 251, (2016)." onclick="event.stopPropagation();var t=this;var ct=document.querySelector('.cite-tooltip');if(ct)ct.remove();navigator.clipboard.writeText(this.getAttribute('data-ref')).then(function(){t.classList.add('copied');setTimeout(function(){t.classList.remove('copied')},1200)});event.preventDefault()"><a href="#ref-Springel2016" id="cite-Springel2016">[3]</a></sup> ）。</div><p class="en-en">Being gravity the force that drives structure formation, the building block of the majority of cosmological simulations is an N-body code (see e.g. <sup class="citation" data-ref="K. Yoshikawa, N. Yoshida, and M. Umemura, Direct Integration of the Collisionless Boltzmann Equation in Six-dimensional Phase Space: Self-gravitating Systems, ApJ. 762, 116, (2013)." onclick="event.stopPropagation();var t=this;var ct=document.querySelector('.cite-tooltip');if(ct)ct.remove();navigator.clipboard.writeText(this.getAttribute('data-ref')).then(function(){t.classList.add('copied');setTimeout(function(){t.classList.remove('copied')},1200)});event.preventDefault()"><a href="#ref-Yoshikawa2013" id="cite-Yoshikawa2013">[1]</a></sup> for a discussion on alternative approaches). The goal of an N-body code is to investigate the non-linear dynamical evolution of a self-gravitating, collisionless system (see <sup class="citation" data-ref="K. Dolag, S. Borgani, S. Schindler, A. Diaferio, and A. M. Bykov, Simulation Techniques for Cosmological Simulations, Space Sci. Rev. 134, 229–268 (Feb., 2008). https://doi.org/10.1007/s11214-008-9316-5." onclick="event.stopPropagation();var t=this;var ct=document.querySelector('.cite-tooltip');if(ct)ct.remove();navigator.clipboard.writeText(this.getAttribute('data-ref')).then(function(){t.classList.add('copied');setTimeout(function(){t.classList.remove('copied')},1200)});event.preventDefault()"><a href="#ref-Dolag2008" id="cite-Dolag2008">[2]</a></sup> ,<sup class="citation" data-ref="V. Springel, High Performance Computing and Numerical Modelling, Star Formation in Galaxy Evolution: Connecting Numerical Models to Reality, Saas-Fee Advanced Course, Volume 43. ISBN 978-3-662-47889-9. Springer-Verlag Berlin Heidelberg, 2016, p. 251. 43, 251, (2016)." onclick="event.stopPropagation();var t=this;var ct=document.querySelector('.cite-tooltip');if(ct)ct.remove();navigator.clipboard.writeText(this.getAttribute('data-ref')).then(function(){t.classList.add('copied');setTimeout(function(){t.classList.remove('copied')},1200)});event.preventDefault()"><a href="#ref-Springel2016" id="cite-Springel2016">[3]</a></sup> , for reviews).</p>