Coupling of FVM and LBM for Natural Convection in a Square Cavity

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Coupling of FVM and LBM for Natural Convection in a Square Cavity

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- Coupling of FVM and LBM for Natural Convection in a Square Cavity
- Vol. 45, Issue 5, Pages: 78-83(2011)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB13
- Online First：10 May 2011，
  
  Published：2011
- 稿件说明：
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Coupling of FVM and LBM for Natural Convection in a Square Cavity[J]. 2011, 45(5): 78-83.
DOI：

Coupling of FVM and LBM for Natural Convection in a Square Cavity[J]. 2011, 45(5): 78-83. DOI：

摘要

在已有的密度分布函数重构算子的基础上

推导出了温度分布函数的重构算子

解决了格子Boltzmann方法(LBM)与有限体积法耦合计算传热问题的关键难题.选二维方腔自然对流对耦合方法进行了考核. 在瑞利数Ra=10

～10

范围内

耦合结果同商业软件FLUENT结果符合得很好

并且各物理量在耦合界面处连续且光滑过渡.通过残差曲线可以看出

耦合模型在密网格以及大瑞利数情况下

数值稳定性要好于单一LBM.

Abstract

On the basis of the existing density distribution function reconstruction operator

the temperature distribution function reconstruction operator was derived to calculate heat transfer by coupling of the lattice Boltzmann method(LBM)and the finite volume method(FVM). The present coupling method was validated by the 2D natural convection flow in a square cavity with various Rayleigh numbers(Ra)from 10

to 10

. The results from the coupling method agree well with those by commercial software FLUENT

and all the physical quantities cross the coupled interface smoothly. According to residual history curves it is likely that the numerical stability of the present method are better than those of the pure LBM at fine grid numbers and high Ra.

关键词

Keywords

references

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