The Pool-Boiling-Induced Deposition of Nanoparticles as the Transient Game Changer—A Review

Abstract

It is widely known by the scientific community that the suspended nanoparticles of nanofluids can enhance the thermophysical properties of base fluids and maximize pool-boiling heat transfer. However, the nanoparticles may undergo extended boiling times and deposit onto the heating surfaces under pool-boiling conditions, thus altering their intrinsic characteristics such as wettability and roughness over time. The present study reviews the fundamental mechanisms and characteristics of nanoparticle deposition, and its impact on surface roughness and wettability, density of vaporized core points, and thermal resistance, among other factors. Moreover, the effect of the nanoparticle layer in long-term thermal boiling performance parameters such as the heat transfer coefficient and critical heat flux is also discussed. This work attempts to highlight, in a comprehensive manner, the pros and cons of nanoparticle deposition after extended pool-boiling periods, leading the scientific community toward further investigation studies of pool-boiling heat-transfer enhancement using nanofluids. This review also attempts to clarify the inconsistent results of studies on heat transfer parameters using nanofluids.

Advancements in Nanoparticle Deposition Techniques for Diverse Substrates: A Review

“…Thermal Effects: Temperature gradients and localized heating can induce thermal motion of nanoparticles, influencing their deposition. Techniques like laser metal deposition and electron gun evaporation utilize thermal energy to vaporize or melt nanoparticles, which then condense onto the substrate surface [ 112 , 113 ].…”

Flow Boiling Heat Transfer; Experimental Study of Hydrocarbon Based Nanorefrigerant in a Vertical Tube

“…In particular, the surface roughness after the nanoparticle deposition is influenced by the fraction and intrinsic thermal properties of the nanoparticles and heating surface roughness. The mending effect of nanoparticles in rough surfaces can decrease the density of the nuclear sites decreasing the heat transfer coefficient [46,47], but nanomaterials deposition can promote new and more nucleation points mainly in the polish surface [48], promoting the heat transfer coefficient.…”

Heat Transfer and Fluids Properties of Nanofluids

“…It is, therefore, worthwhile to critically review the findings from the literature on this key topic. To this end, Pereira et al [ 2 ] systematically reviewed the possible mechanisms and characteristics of nanoparticle deposition and its impact on various factors, such as surface roughness and wettability, the density of vaporized core points, and thermal resistance. It also attempted to explain the inconsistent data on the boiling heat transfer performance of nanofluids.…”