Gas-liquid flow boiling shows great potential for heat dissipation applications. However, accurate numerical simulations of flow boiling remain a challenge due to the accuracy of predictions and the difficulty of implementing phase change models. This paper presents a boiling phase-change model that is easy to implement and provides acceptable accuracy based on the volume of fluid (VOF) method. The model drives phase changes primarily based on deviations of the interfacial temperature above the saturation temperature, and the model takes into account vapor and liquid thermal conductivities and grid size. Furthermore, the phase change model is restricted to implementation in interface or liquid cells directly adjacent to pure gas cells. Various theoretical problems with analytic solutions, such as the one-dimensional Stefan problem, the sucking problem, the two-phase Stefan problems, and the bubble growth in superheated liquid, are used to validate the accuracy of the model. The results show that the proposed boiling phase change model is well adapted and provides good accuracy for various problems.