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Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
December, 14-17, 2023, Bihar, India

Numerical Validation of Lee's Evaporation Model for Heat Pipe Applications

Get access (open in a dialog) DOI: 10.1615/IHMTC-2023.830
pages 509-514


Due to their capacity to model the intricacies of a moving boundary, which are exceedingly difficult to analyse or even observe with theoretical or experimental methods, computational techniques for solving the phase change problem are gaining popularity. Lee's model is one of the most widely used models for simulating the heat and mass transfer caused by the liquid-to-vapor phase transition. However, this model suffers from the inherent difficulty of determining the mass transfer intensity factor (r), which should be chosen so that the interface temperature remain close to the saturation temperature. Before using this model for any further numerical simulation of liquid-vapor phase change problems, it must be thoroughly validated by comparing its results with the standard analytical or experimental benchmarks. The analytical solution of the one-dimensional Stefan evaporation problem and empirical solutions of the two-dimensional film boiling problem are utilized to numerically validate Lee's model of water evaporation. The outcomes demonstrate substantial concordance with the validation benchmarks. In the present research, the effect of wall temperature on the obtained mass transfer intensity coefficient is also discussed.