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Axial Greens function method for steady Stokes flow in geometrically complex domains

机译:几何复杂区域中稳定Stokes流的轴向格林函数方法

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摘要

Axial Greens function method (AGM) is developed for the simulation of Stokes flow in geometrically complex solution domains. The AGM formulation systematically decomposes the multidimensional steady-state Stokes equations into 1D forms. The representation formula for the solution variables can then be derived using the 1D Greens functions only, from which a system of 1D integral equations is obtained. Furthermore, the explicit representation formula for the pressure variable enable the unique AGM approach to facilitating the stabilization issue caused by the saddle structure between velocity and pressure. The convergence of numerical solutions, the simple axial discretization of complex solution domains, and the nature of integral schemes are demonstrated through a variety of numerical examples.
机译:轴向格林函数方法(AGM)是为模拟几何复杂解域中的斯托克斯流而开发的。 AGM公式系统地将多维稳态Stokes方程分解为1D形式。然后只能使用1D Greens函数导出解决方案变量的表示公式,从中可以获得1D积分方程组。此外,压力变量的显式表示公式使独特的AGM方法可以简化由速度和压力之间的鞍形结构引起的稳定性问题。通过各种数值示例证明了数值解的收敛性,复杂解域的简单轴向离散以及积分方案的性质。

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