Study on Al₂O₃ Nanofluid Critical Heat Flux Mechanism Model: Physics Models

In this study, to overcome the shortcomings of the present models, based on the analysis of the force balance of the bubble, considering the contact angle and capillary wicking effects, a Al₂O₃ nanofluid critical heat flux (CHF) mechanism model is developed. It is shown that, this model can simulate the effect of nanofluid concentration (c_NF) on CHF, that is, as c_NF increases, CHF increases at the beginning, and when c_NF is greater than a certain value, CHF no longer increases and maintains a constant value, and this model can explain that the diameter of nanoparticle (d₀) has no effect on CHF, which are in a good agreement with experimental results. As the contact angle or inclination angle increases, calculated CHF by this model decreases.