2022/04/05 by Sebastian Schmitt, Truong Vo, Truong Quoc Vo +3 · 24 citations
Chemistry · Earth and Planetary Sciences · Engineering · Materials Science · #Chemistry #Convection #Dimensionless quantity #Film temperature #Fluid dynamics #Heat transfer #Interfacial thermal resistance #Materials science #Mechanics #Molecular dynamics #Nanofluid Flow and Heat Transfer #Nusselt number #Physics #Reynolds number #Thermal properties of materials #Thermal resistance #Thermodynamics #Turbulence #Work (physics) #nanoparticles nucleation surface interactions
paper · doi:10.1080/00268976.2022.2057364
published in Molecular Physics 120(10) (Taylor & Francis)
openalex publication_date 2022/04/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25
Nanoscale heat transfer across a solid–fluid interface was investigated by molecular dynamics simulations. The studied system consists of a fluid confined between two parallel plane atomistic walls. There is no convection. Both the fluid and the solid were modelled with the Lennard-Jones truncated and shifted potential. The following parameters were varied systematically: strength of solid–fluid and solid–solid interaction, mass of solid particles, temperature difference between fluid and solid, fluid temperature, fluid density, and channel width. From the simulation results, numbers for the Kapitza length LK were obtained, which characterises the heat transfer resistance at the solid–fluid interface. A correlation of the results for the Kapitza length LK as a function of the studied variables was developed. A dimensionless number is introduced, the Kapitza interface number Ki, which describes the Kapitza effect in the stagnant fluid and is zero in the absence of the Kapitza effect. It is known that the heat transfer resistance at the interface is generally not influenced by convection, such that the results from the present work can also be used to describe heat transfer with convection in cases in which the Kapitza effect plays a role, or simply to assess the influence of the Kapitza resistance.