表面凝结的UDF程序是一篇探讨在计算流体动力学(CFD)软件中使用用户自定义函数(UDF)模拟表面现象的文章。文章深入分析了如何通过编程技术增强数值模拟的真实性和精确度,为科研和工程应用提供有力工具。
Condensation UDF theory focuses on film condensation in the presence of noncondensable gases. The underlying assumptions for this UDF are as follows:
1. The vapor phase is a binary ideal gas mixture consisting of air and water vapor.
2. The liquid phase consists solely of water.
3. Local thermodynamic equilibrium exists at the interface between the liquid and vapor phases.
4. Only film condensation is considered; dropwise condensation does not occur.
5. Thermal resistance within the liquid film is neglected.