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玻尔兹曼方程BGK 模型的有效性分析
孙泉华; 高巍; 樊菁
Source Publication第十二届全国物理力学学术会议论文摘要集
2012
Conference Name第十二届全国物理力学学术会议
Conference Date2012.11.12-2012.11.13
Conference Place桂林
Abstract玻尔兹曼(Boltzmann)方程描述分子运动的速度分布函数随时间和空间的演化,通常被认为是分析流体运动的微观控制方程。玻尔兹曼方程在形式上是一个七维的微分积分方程,而求解该方程的最大挑战是碰撞项难以精确求解。在实际应用中,玻尔兹曼方程往往作简化处理,目前最常用的简化模型是BGK模型。在BGK模型中,碰撞项由一个速度分布函数向平衡分布的松弛过程来描述,大大降低了原始玻尔兹曼的求解难度。然而,BGK
DepartmentLHD微尺度和非平衡流动
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46979
Collection高温气体动力学国家重点实验室
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孙泉华,高巍,樊菁. 玻尔兹曼方程BGK 模型的有效性分析[C]第十二届全国物理力学学术会议论文摘要集,2012.
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