稀薄气体动理论中介观尺度数值模拟的加速方法OA北大核心CSTPCD
Acceleration scheme for the mesoscopic numerical simulation in the kinetic theory of rarefied gas
针对滑移流、早期过渡流区域采用离散速度法(discrete velocity method,DVM)求解Boltzmann方程收敛速度极慢、计算资源消耗大的难题,提出全流场耦合介观/宏观方程加速方法.在介观层面基于有限差分的DVM求解Boltzmann方程,在宏观层面基于有限体积的压力耦合方程组半隐式方法求解矩方程,充分利用纳维-斯托克斯-傅里叶/R26 矩方程在低克努森数下的快速收敛特性,对介观方程进行加速.基于高阶Hermite多项式重构分布…查看全部>>
To overcome the difficulty that DVM(discrete velocity method)for solving the Boltzmann equation has extremely slow convergence speed and high computational resource consumption in the slip flow and early transition flow regimes,an acceleration scheme which coupling the mesoscopic/macroscopic equations in the full flow area was proposed.Boltzmann model equation could be solved based on the DVM using finite difference method at the mesoscopic level,and the mom…查看全部>>
杨伟奇
国防科技大学空天科学学院,湖南长沙 410073
力学
稀薄气体Boltzmann方程离散速度法R26矩方法加速方法
rarefied gasBoltzmann equationdiscrete velocity methodR26 moment methodacceleration scheme
《国防科技大学学报》 2024 (2)
基于DSMC/PIC方法的脉冲真空弧等离子体羽流场的理论与数值模拟研究
70-78,9
国家自然科学基金资助项目(12302382,U1730247)湖南省自然科学基金青年基金资助项目(2022JJ40542)
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