Design and development of homogeneous hybrid solvers on National Numerical Windtunnel (NNW) PHengLEI

CHEN Jianqiang; MA Yankai; MIN Yaobing; ZHAO Zhong; HE Xianyao; HE Kun

doi:10.7638/kqdlxxb-2020.0177

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Design and development of homogeneous hybrid solvers on National Numerical Windtunnel (NNW) PHengLEI

更新时间：2026-05-28

- Design and development of homogeneous hybrid solvers on National Numerical Windtunnel (NNW) PHengLEI
- Vol. 38, Issue 6, Pages: 1103-1110(2020)
- 作者机构：
  
  中国空气动力研究与发展中心计算空气动力研究所,绵阳,621000
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2020.0177
  CLC： TP311
- Published：2020
- 稿件说明：
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陈坚强, 马燕凯, 闵耀兵, 赵钟, 何先耀, 何琨. 国家数值风洞(NNW)通用软件同构混合求解器设计[J]. 空气动力学学报, 2020, 38(6): 1103-1110.

CHEN Jianqiang, MA Yankai, MIN Yaobing, et al. Design and development of homogeneous hybrid solvers on National Numerical Windtunnel (NNW) PHengLEI[J]. 2020, 38(6): 1103-1110.
陈坚强, 马燕凯, 闵耀兵, 赵钟, 何先耀, 何琨. 国家数值风洞(NNW)通用软件同构混合求解器设计[J]. 空气动力学学报, 2020, 38(6): 1103-1110. DOI： 10.7638/kqdlxxb-2020.0177.

CHEN Jianqiang, MA Yankai, MIN Yaobing, et al. Design and development of homogeneous hybrid solvers on National Numerical Windtunnel (NNW) PHengLEI[J]. 2020, 38(6): 1103-1110. DOI： 10.7638/kqdlxxb-2020.0177.

摘要

针对未来复杂计算流体力学模拟的需求，在国家数值风洞“风雷（PHengLEI）”软件中，针对流场求解器设计了区域混合计算策略，即在不同类型的网格上运行不同的求解器，实现区域混合模拟，采用典型算例进行了验证。与传统多求解器松耦合的“异构”模式不同，风雷软件中设计了“同构”模式的混合求解器。“同构”模式的混合求解器基本思想是：计算域由不同类型网格组成，在不同类型的网格上可运行不同类型的求解器，不同求解器之间在交界面通过数据底层交换信息，其特点是“紧耦合”。区域混合计算能够充分发挥不同类型网格、不同求解器的优点，未来也可以在不同的网格区域上加载不同学科的求解器，是面向未来多学科、多方法、多区域紧耦合模拟的关键技术。作为一种典型的混合求解方案，结构/非结构混合求解时，在结构网格上运行二阶/高阶精度结构求解器，在非结构网格上运行二阶精度非结构求解器，以实现在关键流动区域采用高质量网格、高精度方法的工程实用化目的。首先介绍混合计算所涉及的域、交界面等基本概念，然后设计混合计算所需的数据结构，以及混合计算策略。最后，通过高超声速圆柱绕流和双椭球绕流两个案例，在结构网格上运行二阶或WCNS高阶精度求解器，在非结构网格上运行二阶精度非结构求解器，验证“同构”混合计算的可行性和有效性。

Abstract

To the complexity of Computational Fluid Dynamics in the future

a framework of hybrid solver has been designed in NNW-PHengLEI software with different solvers on different type of meshes

and the zonal hybrid simulation is achieved. Other than the traditional heterogeneous computing model loose-coupling multi-solver

the homogeneous computing model hybrid solver is designed in NNW-PHengLEI software. The elementary idea of homogeneous computing model with hybrid solver is that

the whole computation zone can be divided into sub-zones filled by different type of meshes

different solvers can be operated according to the mesh

and the information at the interface of different solvers is exchanged by database

so that the salient feature of zonal hybrid solver is tight-coupling computing. The advantages of different solvers on different type of meshes can be promoted by zonal hybrid simulation

and the multidisciplinary solvers can be run on different meshes in the future. The zonal hybrid simulation is a key technique to the multidisciplinary/multi-zone simulations merged together. One example: second order/high order structure solver is run on structure grid

second order unstructured solver on unstructured grid

so that the significant feature of flow can be resolved by high order structure method

and the rest of flow field may be by second order unstructured solver. In this paper the basic concepts of zone and interface involved hybrid simulation are described firstly

and then the data structure and implement strategy are introduced

finally

two supersonic numerical examples 2D cylinder and 3D double ellipsoid cases verify the feasibility of hybrid simulation in NNW-PHengLEI software.

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references

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