封闭方腔自然对流的格子-Boltzmann方法动态模拟

童长青; 何雅玲; 王勇; 刘迎文

您当前的位置：

首页 >

文章列表页 >

封闭方腔自然对流的格子-Boltzmann方法动态模拟

专题研究 | 更新时间：2025-12-08

- 封闭方腔自然对流的格子-Boltzmann方法动态模拟
- Simulation of Transient Natural Convection in Square Cavity with Incompressible Thermal Lattice-Boltzmann Method
- 西安交通大学学报 2007年41卷第1期页码：32-36
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
  
  : 2006-05-12. 作者简介: 童长青(1981～),男,硕士生;何雅玲(联系人),女,教授,博士生导师. 基金项目: 全国博士学位论文作者专项资金资助项目(200436);高等学校博士学科点专项科研基金资助项目(20050698036)
- DOI：
  中图分类号： TK124
- 网络首发：2007-01-10，
  
  纸质出版：2007
- 稿件说明：
移动端阅览
童长青, 何雅玲, 王勇, 等. 封闭方腔自然对流的格子-Boltzmann方法动态模拟[J]. 西安交通大学学报, 2007,41(1):32-36.

童长青, 何雅玲, 王勇, et al. Simulation of Transient Natural Convection in Square Cavity with Incompressible Thermal Lattice-Boltzmann Method[J]. 2007, 41(1): 32-36.
童长青, 何雅玲, 王勇, 等. 封闭方腔自然对流的格子-Boltzmann方法动态模拟[J]. 西安交通大学学报, 2007,41(1):32-36. DOI：

童长青, 何雅玲, 王勇, et al. Simulation of Transient Natural Convection in Square Cavity with Incompressible Thermal Lattice-Boltzmann Method[J]. 2007, 41(1): 32-36. DOI：

摘要

以压力分布函数和内能密度分布函数为基本演化变量

构建了一个新的不可压缩的双分布函数热格子-Boltzmann模型.对封闭方腔内自然对流进行数值分析的结果表明

该模型可以克服原模型的可压缩效应

并在一定程度上提高了计算结果的数值精度.以此模型动态模拟封闭方腔自然对流的形成和演化过程的结果表明:Ra越大

流场的演化越复杂

稳定状态下方腔内涡的数量越多

高低温壁面附近的换热越强烈

压强逐渐呈现出中心低

上、下壁面附近高的对称分布.

Abstract

An incompressible double distribution thermal lattice-Boltzmann model

considering the pressure distribution and energy density distribution as the elementary evolution variables

is presented to solve the weak compressibility at low Mach number of the previous model. The numerical results of the natural convection in an enclosure square cavity in this model agree well with the commonly accepted numerical solutions. And the real-time development of the flow and heat transfer is reported and discussed. The results show that as Raylaigh number increases

the flow field gets more complicated

and the heat transfer near the walls at high and low temperature becomes more intensively. The pressure symmetrically distributes with a valley at the center of the cavity and peaks near the horizontal walls.

关键词

Keywords

references

Chen Shiyi, Doolen G D. Lattice Boltzmann method for fluid flows [J]. Ann Rev Fluid Mech, 1998, 30(1): 329-364.

Wang Yong, He Yaling, Tang Guihua, et al. Simulation of two dimensional oscillating flow using the lattice Boltzmann method [J]. Int J Mod Phys C, 2006, 17(5): 615-630.

He Xiaoyi, Chen Shiyi, Doolen G D. A novel thermal model for the lattice Boltzmann method in incompressible limit [J]. Journal of Computational Physics, 1998, 146(1): 282-300.

He Xiaoyi, Luo Lishi. Lattice Boltzmann model for the incompressible Navier-Stokes equation [J]. J Stat Phys, 1997, 88(3/4): 927-944.

D'Orazio A, Corcione M, Celata G P. Application to natural convection enclosed flows of a lattice Boltzmann BGK model coupled with a general purpose thermal boundary condition [J]. International Journal of Thermal Sciences, 2004, 43(6): 575-586.

de Vahl Davis G. Natural convection of air in a square cavity: a bench mark numerical solution [J]. Int J Numer Methods Fluids, 1983,3(3): 249-264.

Barakos G, Mitsoulis E, Assimacopoulos D. Natural convection flow in a square cavity revisited: laminar and turbulent models with wall functions [J]. J Numer Methods Fluids, 1994, 8(7): 695-719.

Patterson J, Imberger J. Unsteady natural convection in a rectangular cavity [J]. J Fluid Mech, 1980, 10(1): 65-88.

Incropera F P, DeWitt D P. Fundamentals of heat and mass transfer[M]. 2nd ed. New York, USA: John Wiley Sons, 1985: 417-426.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

通孔金属泡沫中的空气自然对流传热实验研究

一种三维切削网格上的N-S方程离散方法

具有截面自然对流通道内湍流换热的直接数值模拟

高瑞利数下封闭腔内自然对流的数值模拟

金属丝网编织Kagome自然对流实验研究