准一维完美流与边界层耦合的数学模型
Mathematical model for coupling a quasi-unidimensional perfect flow
AI总结:
基于薄层Navier-Stokes近似,提出将欧拉方程描述的无粘流与线性边界层方程耦合的模型,并通过数值离散和解析解验证,应用于长号强非线性波。
摘要:
管乐器的非线性声学导致对一维流体流动的研究。通过物理相关的近似,这些近似用薄层Navier-Stokes方程建模,我们提出了一个耦合模型,其中完美流体流动由气体动力学欧拉方程描述,而粘性和热边界层由线性方程建模。我们描述了数值离散化,通过与解析解比较验证了相关软件,并考虑了长号中强非线性波的音乐应用。
英文摘要:
Nonlinear acoustics of wind instruments conducts to study unidimensional fluid flows. From physically relevant approximations that are modelized with the thin layer Navier Stokes equations, we propose a coupled model where perfect fluid flow is described by the Euler equations of gas dynamics and viscous and thermal boundary layer is modelized by a linear equation. We describe numerical discretization, validate the associated software by comparison with analytical solutions and consider musical application of strongly nonlinear waves in the trombone.
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