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格子Boltzmann方法中基于内插值的曲线边界处理新方法
  • 期刊名称：计算力学学报
  • 时间：0
  • 页码：510-517
  • 语言：中文
  • 分类：O35[理学—流体力学;理学—力学]
  • 作者机构：[1]浙江大学力学系流体工程研究所,杭州310027
  • 相关基金：国家自然科学基金重点（10632070）资助项目
  • 相关项目：超常颗粒多相流动力学模型
作者： 刘演华|林建忠|
关键词： 格子BOLTZMANN方法, 边界条件, 数值计算, 内插值, Lattice Boltzmann method, boundary condition, numerical computation, interpolation
中文摘要：

对格子Boltzmann方法提出了一种新的曲面边界条件处理方法。在笛卡尔坐标系中，这种处理方法是现有的格子Boltzmann方法有关边界条件处理与浸入武边界条件的混合．它采用内插值方法计算靠近物理边界的网格点速度。使其保证最低精度为二阶，然后利用格子Boltzmann方法中的边界条件技术得到相应的分布函数。由理论推导和数值计算表明。本文提出的方法比其他方法更稳定且具有二阶精度。

英文摘要：

A new curved boundary treatment is proposed for the Lattice Boltzmann method. With Cartesian coordinate, it is a combination of the exising treatment of boundary condition and immersed boundary condition. It adopts an interpolation to evaluate the node velocity near the physical wall, which provides at least secondary-order accuracy both in velocity and distribution fields. Once the node velocity is given, a variety of boundary treatment proposed previously can be applied to these nodes. Numerical test shows that it is more stable and has secondary-order accuracy.

同期刊论文项目
超常颗粒多相流动力学模型
期刊论文 86 会议论文 15 获奖 2 著作 1
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