3D-Printed vapor guiding structures for enhanced pool boiling heat transfer

In the present study, we utilized additive manufacturing, specifically 3d printing, to enhance the boiling heat transfer performance. This study stands out from the previous ones in that we utilized a vapor guiding structure (VGS) for direct bubble control. The relationship between the bubble behavior and the boiling heat transfer performance was evaluated through visualization analysis. With the application of the VGS, the bubble departure diameter, including the growth mechanism, was successfully controlled. High-speed images verified a physical delay in lateral merging by establishing a liquid-vapor pathway. Consequently, the heat transfer coefficient and critical heat flux were enhanced. We also examined the influence of the geometric design of the VGS on bubble behavior control and the boiling heat transfer performance. Following experimental validation, we expect future breakthroughs in boiling heat transfer by refining single bubble control and enhancing arrays. Additionally, the current applicability can be potentially expanded through the application of 3d printed structures.