A divergence‐conforming hybridized discontinuous Galerkin method for the incompressible Reynolds‐averaged Navier‐Stokes equations

A divergence‐conforming hybridized discontinuous Galerkin method for the incompressible Reynolds‐averaged Navier‐Stokes equations
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不可压缩雷诺平均纳维-斯托克斯方程的散度一致混合间断伽辽金法

DOI:
10.1002/fld.4745
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发表时间:
2019
影响因子:
1.8
通讯作者:
John A. Evans
John A. Evans
中科院分区:
工程技术4区
文献类型:
--
作者:
E. L. Peters;John A. Evans

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针对不可压缩的Reynolds - average Navier - Stokes方程和Spalart - Allmaras单方程湍流模型,提出了一种杂化不连续Galerkin (HDG)方法。该方法扩展了最近由Rhebergen和Wells引入的用于不可压缩Navier‐Stokes方程的HDG方法。对于元素自由度和轨迹自由度(dof),该方法对速度和压力空间进行了特殊选择,从而返回逐点发散的平均速度场,并适当地平衡了动量和能量。我们进一步研究了不同多项式度和网格的使用,以了解标量涡流粘度的阶数如何影响平均速度和压力场的收敛,特别是对于制造解的方法。作为HDG方法的标准,静态冷凝可以用来去除单元的自由度,从而大大减少自由度的整体数量。数值结果表明了所提方法的有效性。
We present a hybridized discontinuous Galerkin (HDG) method for the incompressible Reynolds‐averaged Navier‐Stokes equations coupled with the Spalart‐Allmaras one‐equation turbulence model. The method extends upon an HDG method recently introduced by Rhebergen and Wells for the incompressible Navier‐Stokes equations. With a special choice of velocity and pressure spaces for both element and trace degrees of freedom (DOFs), the method returns pointwise divergence‐free mean velocity fields and properly balances momentum and energy. We further examine the use of different polynomial degrees and meshes to see how the order of the scalar eddy viscosity affects the convergence of the mean velocity and pressure fields, specifically for the method of manufactured solutions. As is standard with HDG methods, static condensation can be employed to remove the element DOFs and thus dramatically reduce the global number of DOFs. Numerical results illustrate the effectiveness of the proposed methodology.
在 SuperMUC 上使用 SeisSol 进行地震模拟的持续千万亿次性能
DOI: 10.1007/978-3-319-07518-1_1
发表时间: --
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作者:
A. Breuer;A. Heinecke;S. Rettenberger;M. Bader;​A.-A. Gabriel ​and C. Pelties
通讯作者: ​A.-A. Gabriel ​and C. Pelties