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arXiv 2602.02247math.NAcs.NAmath.APphysics.flu-dyn
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浅水线性矩方程的新的能量方程推导

A new Energy Equation Derivation for the Shallow Water Linearized Moment Equations

Ghent University(根特大学);University of Groningen(格罗宁根大学)

Julian Koellermeier

AI总结:

本文对浅水线性矩方程的能量方程进行了新的系统推导,基于标准SWE能量方程推导并包含斜对称形式,有助于扩展到其他SWME变种及其数值求解。

摘要:

浅水矩方程(SWME)是为高效建模和数值模拟自由表面流而对广为人知的浅水方程(SWE)进行扩展。虽然SWE通常假设深度平均的垂直速度分布,但SWME允许速度分布的垂直变化。因此,SWME假设多项式分布,并通过更高阶深度积分推导出多项式系数的额外演化方程。在本文中,我们对特定SWME变种——浅水线性矩方程(SWLME)的能量方程进行了新的系统推导。推导基于标准SWE能量方程推导,并包含模型的斜对称形式。新的系统推导有助于扩展到其他SWME变种及其数值求解。

英文摘要:

Shallow Water Moment Equations (SWME) are extensions to the well-known Shallow Water Equations (SWE) for the efficient modeling and numerical simulation of free-surface flows. While the SWE typically assume a depth-averaged vertical velocity profile, the SWME allow for vertical variations of the velocity profile. The SWME therefore assume a polynomial profile and then derive additional evolution equations for the polynomial coefficients via higher order depth integration. In this work, we perform a new systematic derivation of the energy equation for a specific variant of the SWME, called the Shallow Water Linearized Moment Equations (SWLME). The derivation is based on the standard SWE energy equation derivation and includes the skew-symmetric formulation of the model. The new systematic derivation is beneficial for the extension to other SWME variants and their numerical solution.

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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