Open AccessModeling of Particle Deposition in a Two-Fluid Flow Environment
Author(s) -
Yap Yit Fatt,
Afshin Goharzadeh
Publication year - 2021
Publication title -
heat and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.283
H-Index - 29
ISSN - 0392-8764
DOI - 10.18280/ijht.390338
Subject(s) - deposition (geology) , mechanics , particle (ecology) , particle deposition , viscosity , fluid dynamics , flow (mathematics) , stratified flow , bubble , materials science , compressibility , volume of fluid method , particle laden flows , finite volume method , two fluid model , multiphase flow , stokes number , two phase flow , physics , thermodynamics , geology , reynolds number , turbulence , oceanography , sediment , paleontology
Particle deposition occurs in many engineering multiphase flows. A model for particle deposition in two-fluid flow is presented in this article. The two immiscible fluids with one carrying particles are model using incompressible Navier-Stokes equations. Particles are assumed to deposit onto surfaces as a first order reaction. The evolving interfaces: fluid-fluid interface and fluid-deposit front, are captured using the level-set method. A finite volume method is employed to solve the governing conservation equations. Model verifications are made against limiting cases with known solutions. The model is then used to investigate particle deposition in a stratified two-fluid flow and a cavity with a rising bubble. For a stratified two-fluid flow, deposition occurs more rapidly for a higher Damkholer number but a lower viscosity ratio (fluid without particle to that with particles). For a cavity with a rising bubble, deposition is faster for a higher Damkholer number and a higher initial particle concentration, but is less affected by viscosity ratio.