| 一种处理无限空间自然对流边界条件的新方法 |
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| 引用本文： | 丁鹏,李安桂.一种处理无限空间自然对流边界条件的新方法[J].工业加热,2005,34(5):14-17. |
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| 作者姓名： | 丁鹏 李安桂 |
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| 作者单位： | 1. 西安交通大学,能源与动力学院,热流中心,陕西,西安,710049
2. 西安建筑科技大学,环境与市政工程学院,陕西,西安,710055 |
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| 摘 要： | 数值求解了常热流边界条件下竖直平板在无限空间里的层流自然对流问题.在10^3＜Ra＜10^7,Pr=0.71范围内得到了竖平板周围的流场和温度场分布以及平板的平均对流换热系数.提出了一种处理外部虚拟边界的新方法,将边界上的已知压力转换为速度,与已有数值解及相似解的比较表明该方法可以用较小的计算区域得到准确的结果.
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| 关 键 词： | 自然对流 无限空间 边界条件 |
| 文章编号： | 1002-1639(2005)05-0014-04 |
| 收稿时间： | 2004-11-30 |
| 修稿时间： | 2005-01-07 |
A Novel Method for the Treatment of Boundary Condition of Natural Convection In an Infinite Space |
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| DING Peng,LI An-gui.A Novel Method for the Treatment of Boundary Condition of Natural Convection In an Infinite Space[J].Industrial Heating,2005,34(5):14-17. |
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| Authors: | DING Peng LI An-gui |
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| Abstract: | A numerical solution to the Navier-Stokes and energy Equations for steady laminar air natural convection from a vertical isofluxplate is presented. The stream line, isothermal and the average heat transfer coefficient were given out in the range103< <107, =0.71.A new method, named specified pressure boundary condition, for the treatment of boundary condition of the open boundary condition wasprosposed, accurate result can be obtained with a relatively small computational domain. The numerical results were compared with the simi-larity solution and other numerical , experimental works, good agreement was found between them. |
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| Keywords: | natural convection infinite space boundary condition |
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