Analysis of nanoscale two-phase flow of argon using molecular dynamics

Journal Article · Tue Dec 09 04:00:00 UTC 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4902692· OSTI ID:22390592

Verma, Abhishek Kumar; Kumar, Rakesh ^[1]

---

1. Department of Aerospace Engineering, Indian Institute of Technology Kanpur, Kanpur - 208016 (India)

Two phase flows through micro and nanochannels have attracted a lot of attention because of their immense applicability to many advanced fields such as MEMS/NEMS, electronic cooling, bioengineering etc. In this work, a molecular dynamics simulation method is employed to study the condensation process of superheated argon vapor force driven flow through a nanochannel combining fluid flow and heat transfer. A simple and effective particle insertion method is proposed to model phase change of argon based on non-periodic boundary conditions in the simulation domain. Starting from a crystalline solid wall of channel, the condensation process evolves from a transient unsteady state where we study the influence of different wall temperatures and fluid wall interactions on interfacial and heat transport properties of two phase flows. Subsequently, we analyzed transient temperature, density and velocity fields across the channel and their dependency on varying wall temperature and fluid wall interaction, after a dynamic equilibrium is achieved in phase transition. Quasi-steady nonequilibrium temperature profile, heat flux and interfacial thermal resistance were analyzed. The results demonstrate that the molecular dynamics method, with the proposed particle insertion method, effectively solves unsteady nonequilibrium two phase flows at nanoscale resolutions whose interphase between liquid and vapor phase is typically of the order of a few molecular diameters.

• OSTI ID: 22390592
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1628; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ARGON
BOUNDARY CONDITIONS
COMPUTERIZED SIMULATION
DENSITY
HEAT FLUX
HEAT TRANSFER
LIQUIDS
MEMS
MOLECULAR DYNAMICS METHOD
NANOSTRUCTURES
NEMS
PARTICLES
PERIODICITY
PHASE TRANSFORMATIONS
SOLIDS
TRANSIENTS
TWO-PHASE FLOW
VAPORS