Autor según el artículo: Lavrinenko A; Gisbert F; Pallares J; Fabregat A
Departamento: Enginyeria Mecànica
Autor/es de la URV: Fabregat Tomàs, Alexandre
Palabras clave: Turbulent mixing Particle wall deposition Natural convection Dispersed multiphase flows Direct numerical simulation Cubical cavity
Resumen: The turbulent dispersion and deposition of airborne solid particles is studied by means of fully-resolved numerical simulations. The computational domain, consisting in a cubical cavity with differentially heated opposed walls filled with air, reproduces the experimental conditions of measurements previously reported in the literature. The computational model assumes that each solid spherical particle trajectory is governed by the balance between hydrodynamic drag, buoyancy, lift, thermophoresis and Brownian forces. The dominant terms responsible for particle deposition mostly depend on the particle size, the solid–gas density ratio and the hydrodynamics within the thermal and momentum boundary layers near the solid surfaces. The present results suggest that previous correlations for the wall-averaged Nusselt number as a function of Rayleigh number over the range between 107 and 5.4×108 can be extended up to Rayleigh number 3.6×109. Also, numerical predictions of the particle deposition rates on thermally active surfaces are in good agreement with both experimental data and analytical boundary layer solutions for particle sizes ranging between 0.1 μm and 2.5 μm in diameter. These particle sizes allows to study different particle deposition regimes varying from that controlled by thermophoresis (0.1 μm) to that dominated by gravitational forces (2.5 μm).
Áreas temáticas: Thermodynamics Química Mechanics Interdisciplinar General chemical engineering Engenharias iv Engenharias iii Engenharias ii Condensed matter physics Ciências biológicas i Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Atomic and molecular physics, and optics Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: alexandre.fabregat@urv.cat
Identificador del autor: 0000-0002-6032-2605
Fecha de alta del registro: 2023-02-19
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S0735193322006868
Referencia al articulo segun fuente origial: International Communications In Heat And Mass Transfer. 141
Referencia de l'ítem segons les normes APA: Lavrinenko A; Gisbert F; Pallares J; Fabregat A (2023). Fully-resolved numerical simulations of the turbulent flow and particle deposition in a cubical cavity with two pairs of differentially heated opposed walls at Rayleigh number 3.6 × 109. International Communications In Heat And Mass Transfer, 141(), -. DOI: 10.1016/j.icheatmasstransfer.2022.106564
URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/
DOI del artículo: 10.1016/j.icheatmasstransfer.2022.106564
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2023
Tipo de publicación: Journal Publications
Repositori URV