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首页> 外文期刊>Journal of Computational Physics >Large eddy simulation of turbulent Taylor-Couette flow using isogeometric analysis and the residual-based variational multiscale method
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Large eddy simulation of turbulent Taylor-Couette flow using isogeometric analysis and the residual-based variational multiscale method

机译：等几何分析和基于残差的变分多尺度方法对湍流泰勒-库埃特流的大涡模拟

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摘要

We present an application of the residual-based variational multiscale turbulence modeling (RBVMS) methodology to the computation of turbulent Taylor-Couette flow at high Reynolds number. We show that the RBVMS formulation globally conserves angular momentum, a feature that is felt to be important for flows dominated by rotation, and that is not shared by standard stabilized formulations of fluid flow. Weak imposition of Dirichlet boundary conditions is employed to enhance the accuracy of the RBVMS framework in the presence of thin turbulent boundary layers near solid walls. Calculation of conservative boundary forces and torques is also presented for the case of weakly enforced boundary conditions. NURBS-based isogeometric analysis is employed for the spatial discretization, and mesh refinement is performed to assess the convergence characteristics of the proposed methodology. Numerical tests show that very accurate results are obtained on relatively coarse grids. To the best of the authors' knowledge, this paper is the first to report large eddy simulation computations of this challenging test case.
机译：我们提出了基于残差的变分多尺度湍流建模（RBVMS）方法在高雷诺数湍流Taylor-Couette流计算中的应用。我们表明，RBVMS配方在全球范围内都保留了角动量，这一功能对于旋转支配的流动来说很重要，而标准的稳定液流却无法共享这一特征。在实心壁附近存在薄薄的湍流边界层的情况下，采用Dirichlet边界条件的弱势来增强RBVMS框架的准确性。对于边界条件较弱的情况，还提供了保守边界力和扭矩的计算方法。基于NURBS的等几何分析用于空间离散化，并进行网格细化以评估所提出方法的收敛特性。数值测试表明，在相对粗糙的网格上可以获得非常准确的结果。据作者所知，本文是第一个报告此具有挑战性的测试案例的大型涡流仿真计算的文章。

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