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arXiv 2603.01546physics.flu-dyn
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一种用于多维可压缩流的一维离散玻尔兹曼方法

A One-Dimensional Discrete Boltzmann Method for Multidimensional Compressible Flows

Sun Yat-sen University(中山大学);Beijing Institute of Technology(北京理工大学);Tsinghua University(清华大学)

Yaofeng Li, Chuandong Lin

AI总结:

通过引入额外自由度,开发了一种简单高效的一维离散玻尔兹曼方法,用于可调比热比的可压缩流,并通过算子分裂方案扩展到多维模拟。

摘要:

通过引入额外自由度,开发了一种简单高效的一维离散玻尔兹曼方法,用于具有可调比热比的可压缩流。为了保证数值模拟中的伽利略不变性,构建了具有高空间对称性的离散速度集。此外,提出了一种算子分裂方案,将一维动力学公式扩展到统一框架内的一维、二维和三维流动系统模拟。通过多个基准问题(包括Sod激波管、Lax激波管、二维Riemann问题、均匀平移流和声波传播)对所提出的模型和数值方法进行了验证。结果表明,该方法在可压缩流模拟中具有准确性、鲁棒性和灵活性。

英文摘要:

A simple and efficient one-dimensional discrete Boltzmann method is developed for compressible flows with tunable specific heat ratios by incorporating extra degrees of freedom. To guarantee Galilean invariance in numerical simulations, a discrete velocity set is constructed with high spatial symmetry. Furthermore, an operator-splitting scheme is proposed to extend the one-dimensional kinetic formulation to simulations of one-, two-, and three-dimensional flow systems within a unified framework. The proposed model and numerical method are verified and validated against several benchmark problems, including the Sod shock tube, Lax shock tube, 2D Riemann problem, uniform translational flow, and acoustic wave propagation. The results demonstrate the accuracy, robustness, and flexibility of the present approach for compressible flow simulations.

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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