Abstract: To overcome the shortcomings of the present models, considering the contact angle and capillary wicking effects, an Al₂O₃ nanofluid critical heat flux(CHF) mechanism model has been developed. In this study, the developed CHF mechanism model is verified by several Al₂O₃ nanofluid and de-ionized water experiments. The verification shows that the present model can simulate the Al₂O₃ nanofluid experiments well, and overcome the shortcoming of the Kandlikar’s model. Also, this model can predict the trend of CHF versus nanofluid concentration, which is a new function that other models do not have. This model also can simulate the de-ionized water experiments well, and the calculated results are similar to the results calculated by El-Genk and Guo model based on de-ionized water CHF experiments, which means that the developed model has a wide applicability.