场协同理论在平行通道内的数值验证

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Numerical Verification of Field Synergy Principle in Parallel Channels

1. State Key Laboratory of Multiphase Flow on Power Engineering, Xi'an Jiaotong University, 710049, China;
2. Wuhan Second Ship Design Institute, 430064, China

摘要: 利用SIMPLE算法对两平行平板之间有凸台的湍流回流流动换热进行了数值模拟。计算采用k-ε两方程紊流模型,对固体区域利用区域扩充法使流场在几何上规则化,对阶梯型凸台边界用壁面函数法进行了特别处理。在入口处流体Re=10000时,数值计算得出了7组不同凸台高度相对应的流场和温度场。结果表明:平行通道表面总换热量以及换热Nu随流体速度与温度梯度矢量夹角的减小而增大,验证了基于二维边界层流提出的场协同理论同样适用于复杂的湍流回流流动。
- SIMPLE算法 /
- 数值模拟 /
- 壁面函数法 /
- 场协同 /
- 湍流
Abstract: Numerical simulation of turbulent flow with re-circulation was conducted by SIMPLE algorithm with two-equation k-ε model. Extension of computational region method and wall function method were quoted to regulate the whole computational region geometrically, given the inlet Reynold number keeps 10000, by changing the height of the solid obstacle. The result showed that the overall wall heat flux and heat exchange Nu increased with the decreased of the angle between the velocity vector and the temperature gradient. It verified that the field synergy principle based on 2-D boundary laminar flow may be applied to complex turbulent flow even with re-circulation.
- SIMPLE algorithm /
- Numerical simulation /
- Wall function method /
- Field synergy principle /
- Turbulent flow