Publikacje

Abstract:

This study investigates the effects of vibration-assisted laser surface textures (VALS) and
laser surface textures (LS) on boiling heat transfer in a minichannel. Various laser-textured surfaces
were created and applied to study the flow of boiling FC-72 in a single minichannel. Infrared
thermography was used to measure temperature changes on the untextured side of the foil, while
two-phase flow patterns were observed through a glass pane. The heated textured surfaces in
contact with the fluid in the minichannels varied in roughness. Experimental results were presented
as relationships between heated wall temperature, heat transfer coefficient and distance along the
minichannel, boiling curves, and flow patterns. It was noticed that the #LS5 surfaces achieved the
highest local heat transfer coefficient in the subcooled boiling region, while the #LS4 surfaces
performed best in the saturated boiling region compared to all other surfaces, considering the results
obtained at the same value of heat flux supplied to the heated wall

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Laser Surface Texturing for the Intensification of Boiling Heat Transfer in a Minichannel