Abstract
In last years, the direct laser texturing proved as environmentally friendly, scalable, flexible and efficient approach for surface functionalisation by creating appropriate surface features for enhanced boiling performance. When metal surface is laser-processed in open (oxygen-containing) atmosphere, it oxidizes and becomes (super)hydrophilic. However, it is well known that the wettability transition towards (super)hydrophobic state occur, if such a surface is exposed to the presence of hydrophobic contaminants. When water is used as a working fluid, this wettability transition can have a significant effect on nucleate boiling performance, which is investigated in this work.
Highlights
Nucleate pool boiling is a process of heat transfer between a heated surface and a macroscopically stationary surrounding liquid in such a way that generation of vapor bubbles occurs
It is indispensable in many engineering applications as it allows extremely efficient dissipation of heat due to large enthalpy of vaporisation of the working fluids
The direct laser texturing has a potential to overcome these limitations at it allows chemical-free and fast functionalisation of metals to achieve appropriate chemical and topographical modifications for enhanced and controlled nucleate boiling with various working fluids [2, 3]
Summary
Nucleate pool boiling is a process of heat transfer between a heated surface and a macroscopically stationary surrounding liquid in such a way that generation of vapor bubbles occurs. It is indispensable in many engineering applications as it allows extremely efficient dissipation of heat due to large enthalpy of vaporisation of the working fluids. The direct laser texturing has a potential to overcome these limitations at it allows chemical-free (i.e., environmentally friendly) and fast functionalisation of metals to achieve appropriate chemical and topographical modifications for enhanced and controlled nucleate boiling with various working fluids [2, 3]
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