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arXiv 1608.06345physics.comp-phhep-latphysics.flu-dyn
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基于Hermite展开构造任意specific heat比格子Boltzmann模型的新方案

A new scheme based on the Hermite expansion to construct lattice Boltzmann models associated with arbitrary specific heat ratio

Kainan Hu, Hongwu Zhang, Shaojuan Geng

摘要:

提出了一种新的具有可变比热比的格子Boltzmann格式。新的自由度通过与内部结构相关的内能引入。将分布函数的演化方程简化为两个演化方程。一个与密度和速度有关,另一个与能量有关。通过Hermite展开,导出了二维晶格Boltzmann模型和三维晶格Boltzmann模型。采用两种格子Boltzmann模型对一维激波管进行了数值模拟。数值结果与解析解吻合良好。

英文摘要:

A new lattice Boltzmann scheme associated with flexible specific heat ratio is proposed. The new free degree is introduced via the internal energy associated with the internal structure. The evolution equation of the distribution function is reduced to two evolution equations. One is connected to the density and velocity, the other is of the energy. A two-dimensional lattice Boltzmann model and a three-dimensional lattice Boltzmann model are derived via the Hermite expansion. The two lattice Boltzmann models are applied to simulating the shock tube of one dimension. Good agreement between the numerical results and the analytical solutions are obtained.

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。

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