计算机科学 ›› 2023, Vol. 50 ›› Issue (11A): 230200019-8.doi: 10.11896/jsjkx.230200019
刘江1,2, 曾志勇1
LIU Jiang1,2, ZENG Zhiyong1
摘要: CFD计算网格的生成及优化技术是计算流体力学数值计算的关键技术之一,很大程度上决定了数值计算的最终精度及计算效率。CFD模拟实际工程问题所采用的网格规模可达千万级别,在给定的计算时间内获得更高的数值计算精度,是当前CFD急需发展的关键技术。已有研究表明,不同类型的流场误差产生的主要区域与其特征物理量的梯度正相关。有鉴于此,提出了一种基于流场物理信息的网格密度优化方法,使用该方法以及OpenFOAM与cfMesh工具对不可压缩流体案例、燃烧流案例和多相流案例分别进行数值计算。实验结果表明,对于具有不同特征的案例,基于所提方法优化的网格均能够在计算时长差别不大的情况下,比较明显地提升计算精度。
中图分类号:
[1]DOMANIN M,VERGARA C,BISSACCO D,et al.Computa-tional fluid dynamics to assess hemodynamic forces in abdominal aortic aneurysm[J].Vascular and Endovascular Surgery,2022,56(3):349-349. [2]LIAO J W,ZHANG L T,ZHOU X,et al.Improvement of dynamic mesh relaxation method based on double mesh[J].Chinese Journal of Computational Mechanics,2022,39(1):37-41. [3]WANG B J,LI H,YANG X Y,et al.Application of CFD numerical simulation technology in droplet microfluidic multiphase flow characteristics[J].Chemical Industry Progress,2021,40(4):1715-1735. [4]YANG D,HAN J,PAN L.A method of heat exchange structure optimization of the cricoid plastic parts[J].Sensors & Transducers,2014,163(1):301-307. [5]FIELD D A.Laplacian smoothing and delaunay triangulations[J].Communications in Applied Numerical Methods,1988,4(6):709-712. [6]TSAI H M,WONG A S F,CAI J,et al.Unsteady flow calculations with a parallel multiblock moving mesh algorithm[J].AIAA Journal,2001,39(6):1021-1029. [7]ZHAO Y,FORHAD A.A general method for simulation of fluid flows with moving and compliant boundaries on unstructured grids[J].Computer Methods in Applied Mechanics and Engineering,2003,192(39/40):4439-4466. [8]SELIM M M,KOOMULLIL R.Incremental matrix inversionapproach for radial basis function mesh deformation[C]//Proceedings of the Fifteenth Annual Early Career Technical Confe-rence.2015. [9]LIU X,QIN N,XIA H.Fast dynamic grid deformation based on delaunay graph mapping[J].Journal of Computational Physics,2006,211(2):405-423. [10]WANG Y,QIN N,ZHAO N.Delaunay graph and radial basis function for fast quality mesh deformation[J].Journal of Computational Physics,2015,294:149-172. [11]TANG J.Research on adaptive technology of unstructured mesh for engineering[D].Xi’An:Northwestern Polytechnical University,2019. [12]SEO I H,LEE H J,WI S H,et al.Validation of an air temperature gradient using computational fluid dynamics in a semi-open type greenhouse and determination of kimchi cabbage physiological responses to temperature differences[J].Horticulture,Environment,and Biotechnology,2021,62(5):737-750. [13]HUANG M,HÖHNE T.Numerical simulation of multicomponent flows with the presence of density gradients for the upgrading of advanced turbulence models[J].Nuclear Engineering and Design,2019,344:28-37. [14]WANG N H,ZHANG L P,MA R,et al.Influence of unstructured mesh quality on gradient reconstruction and invisco-free flow simulation accuracy[J].Chinese Journal of Computational Mechanics,2017,34(5):555-563. [15]DE SCHRYVER R,EL CHEIKH K,LESAGE K,et al.Numerical reliability study based on rheological input for bingham paste pumping using a finite volume approach in OpenFOAM[J].Materials,2021,14(17):5011. [16]LI Y F,WANG Y W,DU C.Performance simulation of plate heat exchanger based on ANSYS ICEM[J].IOP Conference Series:Earth and Environmental Science,2020,546(5):052046. [17]WILHELMSEN N C A,ANFINSEN H,AAMO O M.Minimum time observer designs for n+m linear hyperbolic systems with unilateral,bilateral or pointwise in-domain sensing[J].European Journal of Control,2021,61:50-67. [18]LI J,ZHU S.On distributed H1 shape gradient flows in optimalshape design of stokes flows:convergence analysis and numerical applications[J].Journal of Computational Mathematics,2022,40(2):232-258. [19]YAN C,YU J,XU J L,et al.Progress and prospect of CFD simulation methods[J].Advances in Mechanics,2011,41(5):562-589. [20]EMILIA F,MARIASOLE B,SANDRO T.Automation techno-logy and computer technology[J].China Radio Electronics Abstract,2010,26(1):152-234. [21]GHIASI P,NAJAFI G,GHOBADIAN B,et al.Analytical and numerical solution for H-type darrieus wind turbine performance at the tip speed ratio of below one[J].International Journal of Renewable Energy Development,2021,10(2):269-281. [22]LÖHNER R,BAUM J D.Adaptive h-refinement on 3D unstructured grids for transient problems[J].International Journal for Numerical Methods in Fluids,1992,14(12):1407-1419. [23]DWYER H A.Grid adaptation for problems in fuid dynamics[J].AIAA Journal,1984,22:1705-1712. [24]LI J,ZHU S.Shape optimization of the Stokes eigenvalue problem[J].SIAM Journal on Scientific Computing,2022,45(2):A798-A828. [25]GRASSO G,WU H,ORESTANO S,et al.CFD-based prediction of wall-pressure spectra under a turbulent boundary layer with adverse pressure gradient[J].CEAS Aeronautical Journal,2021,12(1):125-133. [26]KHAYRULLINA A,VAN HOOFF T,ALANIS RUIZ C,et al.Minimum momentum flux ratio required to prevent air curtain breakthrough in case of cross-curtain pressure gradients:CFD versus analytical equation[J].Building Simulation,2020,13(4):943-960. [27]LIU M L,ZHANG S Q,LI S N.Analysis of influence of grid on CFD simulation results[J].Hydropower and Pumped Storage,2016,2(4):41-47. |
|