Volume-of-Fluid Based Finite-Volume Computational Simulations of Three-Phase Nanoparticle-Liquid-Gas Boiling Problems in Vertical Rectangular Channels

This study develops robust numerical algorithms for the simulation of three-phase (solid-liquid-gas) boiling and bubble formation problems in rectangular channels. The are based on Finite Volume Methods (FVM) implement both volume-of-fluid (VOF) methods liquid-gas interface tracking as well volume-fraction to account concentration embedded solid nano-particles liquid phase. Water is used base-liquid phase modelled via metallic (both aluminium oxide titanium considered) that homogeneously mixed within gas considered a vapour arising from bolling processes liquid-phase. finite volume methodology implemented OpenFOAM software platform, specifically by careful modification manipulation existing solvers. governing fluid dynamical equations, problem, take into thermal conductivity effects (nano-particle), momentum energy equations liquid-phase gas-phase, finally decoupled mass conservation liquid- gas- phases. model change between In addition FVM VOF methodologies discretization pressure-velocity coupling resolved PIMPLE algorithm, combination Pressure Implicit with Splitting Operator (PISO) Semi-Implicit Method Pressure-Linked Equations (SIMPLE) algorithms. computational results presented graphically respect variations time nano-particle fractions. simulations accurately capture bubbles two-phase (particle-free) flow additionally similarly demonstrated illustrate simulated processes. presence enhance heat-transfer, boiling,