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Application of a Shape Sensitivity Equation Method to turbulent flow over obstacles

机译:形状灵敏度方程法在湍流障碍物湍流中的应用

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A Continuous Shape Sensitivity Equation (CSE) method is presented for shape parameters and applied turbulent wall-bounded flows computed using the standard k - e turbulence model with wall functions. Computations are done with an adaptive finite-element code. This paper is an extension of previous works on sensitivity analysis of laminar flows for shape parameters and wall-bounded turbulent flows for value parameters. The differentiation of two-velocity scale wall functions, accounting for their complex dependencies on boundary shape parameters, is presented in details. Flow and sensitivity solutions are first verified on a problem with a closed form solution using the Method of the Manufactured Solution. The problem allows for the Verification of the wall functions and their sensitivities with respect to shape parameters. Then, we present the application of the methodology to sensitivity analysis on a problem of practical engineering complexity. The problem consists in simulating turbulent flows around a square cross-section cylinder in proximity of a solid wall. We investigate the ability of the method to deal with non trivial geometrical changes and to predict important changes in the flow response.
机译:呈现连续的形状灵敏度方程(CSE)方法以用于形状参数,并使用具有壁函数的标准K-E湍流模型计算的应用湍流壁限流。使用自适应有限元代码进行计算。本文是先前作品的延伸,用于对形状参数和壁限值湍流流动的层流量分析进行值参数。详细介绍了两个速度刻度壁函数的分化,占它们对边界形状参数的复杂依赖性。首先使用制造溶液的方法验证流动和灵敏度溶液的封闭式溶液。问题允许验证墙壁功能及其对形状参数的敏感度。然后,我们介绍了方法的应用对实际工程复杂性问题的敏感性分析。问题在于围绕实心壁的方形横截面圆筒的模拟湍流。我们调查了方法处理非琐碎的几何变化的能力,并预测流动响应的重要变化。

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