Simulation of flow around two-dimensional blunt body based on the viscous vortex domain method

ZHAO Guohui; WANG Zhichao; HAO Jianming; GAO Guangzhong

doi:10.7638/kqdlxxb-2022.0084

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Simulation of flow around two-dimensional blunt body based on the viscous vortex domain method

更新时间：2026-05-28

- Simulation of flow around two-dimensional blunt body based on the viscous vortex domain method
- Vol. 41, Issue 9, Pages: 107-118(2023)
- 作者机构：
  
  1. 长安大学公路学院,西安,710064
  2. 武汉市政工程设计研究院有限责任公司,武汉,430023
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2022.0084
  CLC： O357.5
- Published：2023
- 稿件说明：
移动端阅览
赵国辉, 王治超, 郝键铭, 等. 基于黏性涡域法的二维钝体绕流模拟[J]. 空气动力学学报, 2023, 41(9): 107−118.

ZHAO Guohui, WANG Zhichao, HAO Jianming, et al. Simulation of flow around two-dimensional blunt body based on the viscous vortex domain method[J]. 2023, 41(9): 107-118.
赵国辉, 王治超, 郝键铭, 等. 基于黏性涡域法的二维钝体绕流模拟[J]. 空气动力学学报, 2023, 41(9): 107−118. DOI： 10.7638/kqdlxxb-2022.0084

ZHAO Guohui, WANG Zhichao, HAO Jianming, et al. Simulation of flow around two-dimensional blunt body based on the viscous vortex domain method[J]. 2023, 41(9): 107-118. DOI： 10.7638/kqdlxxb-2022.0084.

摘要

针对传统计算流体力学方法需要划分网格且计算耗时长等问题，一种确定性涡方法（黏性涡域法）逐渐发展并日臻成熟。本文利用该方法计算模拟了二维钝体的流场、气动系数及斯特劳哈尔数，并与其他成熟CFD软件计算结果对比来验证模拟精度。黏性涡域法的模拟过程为生成涡量、涡量演变及气动计算。文章首先推导了该方法各过程的基本方程，然后基于Lua语言编制了圆柱和方柱绕流计算程序，最后利用Gnuplot实现流场可视化。利用黏性涡域法模拟不同雷诺数下圆柱绕流、不同无量纲频率和无量纲振幅的振动圆柱气动力时程、不同风向角下的方柱绕流，结果表明：雷诺数为2 × 10

～1 × 10

时，基于黏性涡域法的圆柱绕流气动计算结果与其他方法的计算结果基本一致；基于该方法的不同风向角下方柱绕流气动计算结果与其他文献结果趋势相同。

Abstract

The mesh generation is indispensable for traditional CFD methods

but it usually takes a long time

especially for complex geometries. By comparison

the mesh-free viscous vortex domain (VVD) method is getting increasingly more attention for flow field simulation and has undergone significant development recently. This paper first verifies the accuracy of VVD by simulating the flow field around a bluff body section and comparing the results with those of other CFD methods. Then

the governing equations for the three steps of VVD

vorticity generation

vorticity evolution

and aerodynamic calculation

are derived

based on which a flow

field calculation program is developed using Lua language. Finally

use Gnuplot to visualize the flow field. VVD is used to simulate flow fields around a circular cylinder at different Reynolds numbers

the aerodynamic histories of a vibrating circular cylinder at different dimensionless frequencies and amplitudes

and the flow fields around a rectangular cylinder at different wind angles. Results show that when the Reynolds number is between 2 × 10

and 1 × 10

the flow fields around a circular cylinder obtained on the VVD method are consistent with those of other methods. Moreover

the aerodynamics of a rectangular cylinder with different wind angles based on this method have the same trend as those reported in previous studies.

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references

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