In the current work, heat flux in nucleate pool boiling has been predicted using macrolayer and latent evaporation model. The wall superheat (ΔT) thickness (δ) are parameters considered for predicting flux. influence of operating on instantaneous conduction average across investigated. A comparison findings model with Bhat’s decreasing revealed a close agreement under condition at high It is su...

Heat transfer with liquid–vapor phase change in microchannels can support very high heat fluxes for use in applications such as the thermal management of high-performance electronics. However, the effects of channel cross-sectional dimensions on the two-phase heat transfer coefficient and pressure drop have not been investigated extensively. In the present work, experiments are conducted to inv...

The forces due to surface tension and momentum change during evaporation, in conjunction with the forces due to viscous shear and inertia, govern the two-phase flow patterns and the heat transfer characteristics during flow boiling in microchannels. These forces are analyzed in this paper, and two new nondimensional groups, K1 and K2 , relevant to flow boiling phenomenon are derived. These grou...

The new method of analysis by non-orthogonal empirical functions (NEFs) is applied to experimental data for the spatio-temporal variations in wall temperature during nucleate boiling. It is shown that the method can successfully identify the positions and patterns of activity at individual members of a large group of nucleation sites. Statistical methods are developed for comparing data of this...