• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology >DEVELOPMENT OF A NOVEL FULLY COUPLED SOLVER IN OPENFOAM: STEADY-STATE INCOMPRESSIBLE TURBULENT FLOWS
【24h】

DEVELOPMENT OF A NOVEL FULLY COUPLED SOLVER IN OPENFOAM: STEADY-STATE INCOMPRESSIBLE TURBULENT FLOWS

机译：开式泡沫中新型全耦合求解器的开发：稳态不可压缩湍流

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work a block coupled algorithm for the solution of three-dimensional incompressible turbulent flows is presented. A cell-centered finite-volume method for unstructured grids is employed. The interequation coupling of the incompressible Navier-Stokes equations is obtained using a SIMPLE-type algorithm with a Rhie-Chow interpolation technique. Due to the simultaneous solution of momentum and continuity equations, implicit block coupling of pressure and velocity variables leads to faster convergence compared to classical, loosely coupled, segregated algorithms of the SIMPLE family of algorithms. This gain in convergence speed is accompanied by an improvement in numerical robustness. Additionally, a two-equation eddy viscosity turbulence model is solved in a segregated fashion. The substnatially improved performance of the block coupled approach compared to the segregated approach is demonstrated in a set of test cases. It is shown that the scalability of the coupled solution algorithm with increasing numbers of cells is nearly linear. To achieve this scalability, an algebraic multigrid solver for block coupled systems of equations has been implemented and used as linear solver for the system of block equations. The presented algorithm has been entirely embedded into the leading open-source computational fluid dynamics (CFD) library OpenFOAM.
机译：在这项工作中，提出了一种求解三维不可压缩湍流的块耦合算法。对于非结构化网格，采用了以单元为中心的有限体积方法。使用具有Rhie-Chow插值技术的SIMPLE型算法，获得了不可压缩的Navier-Stokes方程的对等耦合。由于同时解决了动量和连续性方程，与SIMPLE系列算法的经典，松散耦合，分离算法相比，压力和速度变量的隐式块耦合导致更快的收敛性。收敛速度的提高伴随着数值鲁棒性的提高。另外，以分离的方式求解了两方程涡流粘度湍流模型。在一组测试案例中，证明了与分离方法相比，块耦合方法的性能大大改善。结果表明，随着单元数量的增加，耦合解算法的可扩展性几乎是线性的。为了实现这种可伸缩性，已经实现了用于方程组的块耦合系统的代数多重网格求解器，并将其用作块方程组的线性求解器。提出的算法已完全嵌入到领先的开源计算流体动力学（CFD）库OpenFOAM中。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号