Abstract
Many special phenomena occur during rapid boiling of a liquid when it is largely superheated near the thermodynamic critical temperature which is much higher than the saturation temperature. However, although there are many experimental work reported the observation of rapid ejection near the surface region of the materials, they are limited in either length or time scales due to the limitation of classical macroscopic theory. In this work, molecular dynamics simulation of heat transfer from nanoparticle to a surrounding liquid pool is carried out to study the effect of solid-liquid interfacial wettability on the boiling phenomena of water around the nanoparticle. The interactions among copper atoms are described by the embedded atom method (EAM) potentials, and the TIP4P water model is used to describe water atoms. The results show that the interfacial thermal conductance is influenced by the interfacial wettability. Increasing the wettability between the particle and the fluid reduces the interfacial resistance. The nucleation of bubbles and formation of vapor occur more quickly for increased solid-liquid interfacial wettability. The results might change due to the uncertainties of the potential functions, therefore further investigation is worthwhile to study rapid boiling of water on nanoparticles using different water models.
Highlights
The concept of nanofluids was firstly proposed by Choi et al [1] at Argonne National Laboratory in the United States in 1995
The abovementioned investigation reveals the tendency of outward diffusion for the interior water molecules. It reveals that the interfacial thermal resistance between the water and the nanoparticle is smaller when the surface is hydrophilic. This can be attributed to the fact that more water molecules emerge at the hydrophilic surface than at the hydrophobic surface, and the increased number density of water molecules near the surface results in enhanced heat transfer between the copper nanoparticle and the water molecules since more energy is transported as the atom distance decreases
Molecular dynamics simulation of heat transfer from a nanoparticle to the surrounding liquid pool is carried out to study the effect of solid-liquid interfacial wettability on the boiling phenomena
Summary
The concept of nanofluids was firstly proposed by Choi et al [1] at Argonne National Laboratory in the United States in 1995 They proposed to suspend nanoscale metal or metal oxide nanoparticles into liquid base liquid in a certain way and proportion. Carey et al [10] studied the effect of solid wall on the boiling process and found that the pressure and critical superheat of liquid molecules near the wall are. Many research on boiling nucleation has been conducted, the research on the influence of different solid wall properties on the nucleation phenomenon and the heat transfer mechanism lacks comprehensive understanding. The effect of solid wall wettability on the liquid boiling is analyzed for the variation of water temperature distribution and number density of water molecules at different distances
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
