A Derivation of the Entropy-Based Relativistic Smoothed Particle Hydrodynamics by Variational Principle

作者：Mota Philipe; Chen Wei Xian; Qian Wei Liang^*

来源：Communications in Theoretical Physics, 2017, 68(3): 382-386.

DOI：10.1088/0253-6102/68/3/382

• hydrodynamics
• SPH method
• variational principle

In this work, a second order smoothed particle hydrodynamics is derived for the study of relativistic heavy ion collisions. The hydrodynamical equation of motion is formulated in terms of the variational principle. In order to describe the fluid of high energy density but of low baryon density, the entropy is taken as the base quantity for the interpolation. The smoothed particle hydrodynamics algorithm employed in this study is of the second order, which guarantees better particle consistency. Furthermore, it is shown that the variational principle preserves the translational invariance of the system, and therefore improves the accuracy of the method. A brief discussion on the potential implications of the model in heavy ion physics as well as in general relativity are also presented.

• 出版日期2017-9
• 单位Univ Estadual Paulista