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arXiv 0901.1958math.APcs.NAmath.NAphysics.class-ph
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不可压缩粘性流体中刚体三维运动的惩罚方法的数值分析

Numerical analysis of a penalization method for the three-dimensional motion of a rigid body in an incompressible viscous fluid

Université de Grenoble(格勒诺布尔大学);CNRS, Laboratoire Jean Kuntzmann(法国国家科学研究中心,让·孔茨曼实验室)

Claire Bost, Georges-Henri Cottet, Emmanuel Maitre

AI总结:

提出并分析了一种惩罚方法,将[1]中的方法扩展到刚体在不可压缩流体中自由运动的情况,通过水平集方法捕捉界面并平均流场速度计算固体速度,数值实验验证了收敛性。

摘要:

我们提出并分析了一种惩罚方法,该方法将[1]中的方法扩展到刚体在不可压缩流体中自由运动的情况。流体-固体系统被视为具有单一密度变密度流,其界面通过水平集方法捕捉。固体速度通过在每个时间步平均固体相中的流场速度来计算。该速度用于惩罚流体-固体界面处的流场速度并移动界面。提供了数值示例以说明我们的收敛结果。还根据现有的存在性结果对我们的结果进行了讨论。[1] Ph. Angot, C.-H. Bruneau and P. Fabrie, A penalization method to take into account obstacles in incompressible viscous flows, Numer. Math. 81: 497--520 (1999)

英文摘要:

We present and analyze a penalization method wich extends the the method of [1] to the case of a rigid body moving freely in an incompressible fluid. The fluid-solid system is viewed as a single variable density flow with an interface captured by a level set method. The solid velocity is computed by averaging at avery time the flow velocity in the solid phase. This velocity is used to penalize the flow velocity at the fluid-solid interface and to move the interface. Numerical illustrations are provided to illustrate our convergence result. A discussion of our result in the light of existing existence results is also given. [1] Ph. Angot, C.-H. Bruneau and P. Fabrie, A penalization method to take into account obstacles in incompressible viscous flows, Numer. Math. 81: 497--520 (1999)

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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