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arXiv 1012.5479math.NAcs.NA
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基于嵌入边界方法的可压缩流与刚体之间的保守耦合算法

A conservative coupling algorithm between a compressible flow and a rigid body using an Embedded Boundary method

CEA-DAM-DIF(法国原子能署替代能源和原子能委员会);Université Paris-Est, CERMICS (ENPC)(巴黎东大学,CERMICS(国立桥路学校));LIMSI-CNRS(法国国家科学研究中心 LIMSI 实验室);Lab. DynFluid, Ensam(国立工艺学院动力学流体实验室)

Laurent Monasse, Virginie Daru, Christian Mariotti, Serge Piperno, Christian Tenaud

AI总结:

提出一种结合嵌入边界方法的显式耦合算法,用于刚体与非定常可压缩流体之间的质量、动量和能量守恒耦合,并通过一维和二维算例验证其有效性。

摘要:

本文研究了一种新的刚体与非定常可压缩流体之间的固-流耦合算法,采用嵌入边界方法。与刚体的耦合是向离散元方法耦合的第一步。流体计算采用笛卡尔网格上的有限体积方法。数值通量的表达式不影响通用耦合算法,我们使用Daru和Tenaud [Daru V, Tenaud C., J. Comput. Phys. 2004]提出的单步高阶格式。嵌入边界方法用于将固体边界的存在整合到流体中。耦合算法完全显式,确保精确的质量守恒以及流体与固体之间的动量和能量平衡。结果表明,该格式保持了流体和固体的均匀运动,且不引入数值边界粗糙度。通过具有挑战性的一维和二维基准测试证明了该方法的有效性。

英文摘要:

This paper deals with a new solid-fluid coupling algorithm between a rigid body and an unsteady compressible fluid flow, using an Embedded Boundary method. The coupling with a rigid body is a first step towards the coupling with a Discrete Element method. The flow is computed using a Finite Volume approach on a Cartesian grid. The expression of numerical fluxes does not affect the general coupling algorithm and we use a one-step high-order scheme proposed by Daru and Tenaud [Daru V,Tenaud C., J. Comput. Phys. 2004]. The Embedded Boundary method is used to integrate the presence of a solid boundary in the fluid. The coupling algorithm is totally explicit and ensures exact mass conservation and a balance of momentum and energy between the fluid and the solid. It is shown that the scheme preserves uniform movement of both fluid and solid and introduces no numerical boundary roughness. The effciency of the method is demonstrated on challenging one- and two-dimensional benchmarks.

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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