Study of micro particles deposition in ribbed channel: A numerical investigation in turbulent airflow

¹ LGCGM, INSA de Rennes, 20 avenue des Buttes de Coësmes, 35708 Rennes France
² Imen Rah consulting Engineers. Research and development service, Tehran, Iran
³ School of Civil Engineering, University of Shiraz, Shiraz, Iran
⁴ IRTES-SeT, Université de Technologie de Belfort-Montbéliard, 90010 Belfort, France
⁵ Université de Lorraine, LEMTA, UMR 7563, 54500 Vandoeuvre-lès-Nancy, France
⁶ CNRS, LEMTA, UMR 7563, 54500 Vandoeuvre-lès-Nancy, France

^a Corresponding author: seyed-amir.bahrani@univ-lorraine.fr

Received: 19 July 2013
Accepted: 8 February 2014

Abstract

The air is modeled as incompressible flow in a ribbed channel. The existence of ribs on channel surface causes the turbulence in flow, therefore we must solve the turbulence equations. There are previous experimentally investigations on turbulence flow in ribbed channels. In this article, the results of numerical simulation are compared with experimental results and the effectiveness of k−ε model in solving the problem of micro-particle deposition with Lagrangian model is studied because of complexities of turbulent flow, the problem is modeled both 2- and 3-dimensionally. After solving the fluid domain, the particle equations of motion are solved separately and finally the particle deposition on channel surface is calculated. Considering the physic and complications of turbulent flows, the results of 2-D simulation are different with experimental results, despite of 3-D results, which are in complete accordance with experimental results.