换热场协同理论的数值模拟

Numerical simulation of field harmony theory for convection heat transfer

场协同理论把对流换热比拟为有内热源的导热问题 ,认为对流换热的强化不仅取决于流体的流动和流体的物性 ,还取决于流场与温度场的协同关系。该文在场协同理论指导下进行了强化换热的机理探讨 ,利用数值分析的方法 ,从分析流场与温度场的协同配合关系入手 ,研究等壁温和等热流两种边界条件下两无限大平板间流动的换热特点。研究结果表明 ,在两无限大平板通道的流动换热特性和流场与温度场的协同状况有密切关系 ,并揭示了在该流动中影响换热的主要当量源。有针对性提出强化换热的方向。

The field harmony theory was used to analyze convection heat transfer as conduction heat transfer with heat sources. The intensity of the heat source was related with not only the velocity and the fluid properties but also the harmonious degree between the velocity and heat flux fields. The method was used to analyze the mechanism for enhancing heat transfer in Poiseuille flow with first or second kind thermal boundary conditions by dividing the main heat source into many equivalent heat sources. The results indicate tight relationship between the intensity of convection heat transfer and the harmonious state of flow field and the temperature field. A method to enhance the heat transfer was also developed using this theory.