Effect of modified surfaces on bubble dynamics and pool boiling heat transfer enhancement: A review

The vast application of boiling phenomena in industrial processes has led scientists to seek methods to increase boiling heat transfer. This requires a precise prediction of the boiling heat transfer coefficient (HTC) between the heater surface and the boiling fluid. Considering the complexity of the heat transfer mechanism, the prediction of this phenomenon under different conditions can be difficult. In pool boiling process, a liquid is heated to its boiling point through a heating surface and phase transition from the liquid state to the vapor state will occur. Therefore, the physical and chemical properties of the liquid, vapor and surface are important in this process.“ In this paper, a review of methods for increasing the boiling heat transfer carried out in three main parts: 1) Surface textures 2) Surface characteristics 3) Surface structures. The effect of modification of these parts on the boiling process parameters, especially the bubbles dynamics, the heat transfer coefficient and critical heat flux (CHF) were investigated which are the most important criteria for evaluating the boiling. The purpose of this study is to obtain a relatively comprehensive knowledge of the enhancement techniques in pool boiling heat transfer in recent years. Empirical correlations and models containing surface specifications are also reviewed and presented for the prediction of boiling characteristics.