Computer Science ›› 2023, Vol. 50 ›› Issue (11A): 230200019-8.doi: 10.11896/jsjkx.230200019

• Computer Software & Architecture • Previous Articles     Next Articles

CFD Mesh Density Optimization Method Based on Characteristic Flow Distributions

LIU Jiang1,2, ZENG Zhiyong1   

  1. 1 School of Computer Science and Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
    2 Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400722,China
  • Published:2023-11-09
  • About author:ZENG Zhiyong,born in 1998,postgra-duate.His main research interests include computational fluid dynamics and CFD mesh optimization.
  • Supported by:
    National Key R & D Program of China(2018YFC0116704),Science and Technology Service Network Initiative(KFJ-STS-QYZD-2021-01-001),National Natural Science Foundation of China(61672488) and Research on Key Techniques of Radar Data Assimilation and Objective Correction of Numerical Forecast(E190600801).

Abstract: The generation and optimization of CFD mesh is a key technology in numerical computation of CFD,which significantly determines the final accuracy and efficiency of numerical simulation.The scale of the mesh used in CFD simulation of practical engineering problems can be tens of millions.How to obtain higher numerical accuracy within a given calculation time is a key technology urgently needed to develop CFD.It is shown that the errors of numerical simulation are positively correlated with the gradients of their characteristic physical quantities.In this paper,a mesh density optimization method based on the gradients of chara-cteristic flow distributions is proposed.The mesh density optimization method,the OpenFOAM and cfMesh tools are used to simulate an incompressible fluid,a combustion flow,and a multiphase flow.Simulation results show that for various cases with differentcharacteristics,the optimized mesh by the proposed method can significantly improve the calculation accuracy within almost same calculation time.

Key words: CFD, Mesh optimization, Characteristic physical quantity, OpenFOAM

CLC Number: 

  • TP311
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