arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1004.1408hep-phnucl-exnucl-th
收藏

相对论重离子碰撞的3+ 1维流体动力学模拟

3+1D hydrodynamic simulation of relativistic heavy-ion collisions

Bjoern Schenke, Sangyong Jeon, Charles Gale

摘要:

我们提出了MUSIC,Kurganov-Tadmor算法的相对论3+1维流体动力学在重离子碰撞场景的实现。这种无Riemann求解器的二阶高分辨率格式的特点是数值粘性很小,并且能够很好地处理激波和间断。我们还采用了一个复杂的算法,使用三维三角剖分的超曲面的冻结表面的确定。利用最近的一种基于晶格的状态方程,计算了Au+Au碰撞在s = 200 GeV时的p_T谱和赝快度分布,给出了各向异性流系数v_2和v_4随p_T和赝快度的变化结果。我们能够以高的数值精度确定v_4,发现它并不强烈地依赖于初始条件或状态方程的选择。

英文摘要:

We present MUSIC, an implementation of the Kurganov-Tadmor algorithm for relativistic 3+1 dimensional fluid dynamics in heavy-ion collision scenarios. This Riemann-solver-free, second-order, high-resolution scheme is characterized by a very small numerical viscosity and its ability to treat shocks and discontinuities very well. We also incorporate a sophisticated algorithm for the determination of the freeze-out surface using a three dimensional triangulation of the hyper-surface. Implementing a recent lattice based equation of state, we compute p_T-spectra and pseudorapidity distributions for Au+Au collisions at root s = 200 GeV and present results for the anisotropic flow coefficients v_2 and v_4 as a function of both p_T and pseudorapidity. We were able to determine v_4 with high numerical precision, finding that it does not strongly depend on the choice of initial condition or equation of state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑