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arXiv 1402.5487physics.comp-phphysics.flu-dyn
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参数化格子玻尔兹曼方法

Parametric Lattice Boltzmann Method

Jae Wan Shim

摘要:

利用拉格朗日插值多项式通过离散速度相关点的系数和Maxwell-Boltzmann分布的矩,给出了格子玻尔兹曼方法的离散平衡分布.提供正值分布的流速和温度的范围随着调节离散速度作为参数而变化。本文提出了一种新的等温和热可压缩纳维-斯托克斯方程水平的流动模型。本文仅用五个网格上的离散速度来模拟热可压缩激波管流动。用参数化模型模拟了由Kelvin-Helmholtz不稳定性引起的二维等温涡和热涡。

英文摘要:

The discretized equilibrium distributions of the lattice Boltzmann method are presented by using the coefficients of the Lagrange interpolating polynomials that pass through the points related to discrete velocities and using moments of the Maxwell-Boltzmann distribution. The ranges of flow velocity and temperature providing positive valued distributions vary with regulating discrete velocities as parameters. New isothermal and thermal compressible models are proposed for flows of the level of the isothermal and thermal compressible Navier-Stokes equations. Thermal compressible shock tube flows are simulated by only five on-lattice discrete velocities. Two-dimensional isothermal and thermal vortices provoked by the Kelvin-Helmholtz instability are simulated by the parametric models.

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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