IJE TRANSACTIONS A: Basics Vol. 31, No. 7 (July 2018) 1454-1462    Article in Press

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S. Akbarnezhadnesheli, A. Soltani Goharrizi and M. Salmanzadeh
( Received: December 12, 2017 – Accepted: February 08, 2018 )

Abstract    This study presents an algorithm for 2-D simulation of particle deposition and dendrite formation by developing of Euler-Lagrange solver of OpenFOAM. The effect of the various arrangement and distance between centers of binary fibers with diameter of 2µm and 500nm is investigated on the particle capture process upon diffusion and interception mechanisms. In the instantaneous filtration of a single fiber, the result from extended solver is in good agreement with the exiting model. The adding of nanofiber to microfiber just causes higher capture efficiency at the cross arrangement with fibers distance 2µm upon diffusion mechanism. When the interception mechanism is effective on the particle capture, binary fibers have higher capture efficiency and pressure drop than the single microfiber at all arrangements especially for the fiber distance 1.5 µm. the good fibers arrangement here seems the cross arrangement with the higher capture efficiency and average pressure drop in the fibers distance 2 µm. Also, at the cross and vertical arrangement of binary fibers, the location of the dendrite chains moves from 45o of microfiber surface to middle of it.


Keywords    binary fibers, Euler-Lagrange, Dendrite formation, Deposition mechanisms.


References    [1]          W. Wang, M. Xie, L. Wang, An exact solution of interception efficiency over an elliptical fiber collector, Aerosol Science and Technology, Vol. 46, No. 8, pp. 843-851, 2012. [2]          S. Kuwabara, The forces experienced by randomly distributed parallel circular cylinders or spheres in a viscous flow at small Reynolds numbers, Journal of the physical society of Japan, Vol. 14, No. 4, pp. 527-532, 1959. [3]          W. C. Hinds, Aerosol Technology: Properties, Behavior, and Measurement of airborne Particles (2nd, 1999. [4]          A. A. Kirsch, N. Fuchs, Studies on fibrous aerosol filters—II. Pressure drops in systems of parallel cylinders, Annals of Occupational Hygiene, Vol. 10, No. 1, pp. 23-30, 1967. [5]          K. Lee, B. Liu, Theoretical study of aerosol filtration by fibrous filters, Aerosol Science and Technology, Vol. 1, No. 2, pp. 147-161, 1982. [6]          J. Pich, The filtration theory of highly dispersed aerosols, Staub Reinhalt. Luft, Vol. 5, pp. 16-23, 1965. [7]          I. Stechkina, A. Kirsch, N. Fuchs, Studies on fibrous aerosol filters—iv calculation of aerosol deposition in model filters in the range of maximum penetration, Annals of Occupational Hygiene, Vol. 12, No. 1, pp. 1-8, 1969. [8]          A. C. Payatakes, C. Tien, Particle deposition in fibrous media with dendrite-like pattern: a preliminary model, Journal of Aerosol Science, Vol. 7, No. 2, pp. 85IN195-94100, 1976. [9]          A. Payatakes, L. Gradoń, Dendritic deposition of aerosol particles in fibrous media by inertial impaction and interception, Chemical Engineering Science, Vol. 35, No. 5, pp. 1083-1096, 1980. [10]        A. Payatakes, L. Gradoń, Dendritic deposition of aerosols by convective Brownian diffusion for small, intermediate and high particle Knudsen numbers, AIChE Journal, Vol. 26, No. 3, pp. 443-454, 1980. [11]        C. Kanaoka, H. Emi, T. Myojo, Simulation of the growing process of a particle dendrite and evaluation of a single fiber collection efficiency with dust load, Journal of Aerosol Science, Vol. 11, No. 4, pp. 377385-383389, 1980. [12]        O. Filippova, D. Hänel, Lattice-Boltzmann simulation of gas-particle flow in filters, Computers & Fluids, Vol. 26, No. 7, pp. 697-712, 1997. [13]        U. Lantermann, D. Hänel, Particle Monte Carlo and lattice-Boltzmann methods for simulations of gas–particle flows, Computers & fluids, Vol. 36, No. 2, pp. 407-422, 2007. [14]        S. Hosseini, H. V. Tafreshi, Modeling particle-loaded single fiber efficiency and fiber drag using ANSYS–Fluent CFD code, Computers & Fluids, Vol. 66, pp. 157-166, 2012. [15]        R. Przekop, L. Gradoń, Dynamics of particle loading in deep-bed filter. Transport, deposition and reentrainment, Chemical and Process Engineering, Vol. 37, No. 3, pp. 405-417, 2016. [16]        Q. Wang, B. Maze, H. V. Tafreshi, B. Pourdeyhimi, A case study of simulating submicron aerosol filtration via lightweight spun-bonded filter media, Chemical Engineering Science, Vol. 61, No. 15, pp. 4871-4883, 2006. [17]        R. Przekop, L. Gradoń, Deposition and filtration of nanoparticles in the composites of nano-and microsized fibers, Aerosol Science and Technology, Vol. 42, No. 6, pp. 483-493, 2008. [18]        S. Akbarnezhad, A. Amini, A. S. Goharrizi, T. Rainey, L. Morawska, Capacity of quartz fibers with high filtration efficiency for capturing soot aerosol particles, International Journal of Environmental Science and Technology, pp. 1-10, 2017. [19]        H. Wang, H. Zhao, K. Wang, Y. He, C. Zheng, Simulation of filtration process for multi-fiber filter using the Lattice-Boltzmann two-phase flow model, Journal of Aerosol Science, Vol. 66, pp. 164-178, 2013. [20]        S. Fotovati, H. V. Tafreshi, A. Ashari, S. Hosseini, B. Pourdeyhimi, Analytical expressions for predicting capture efficiency of bimodal fibrous filters, Journal of Aerosol Science, Vol. 41, No. 3, pp. 295-305, 2010. [21]        A. Podgórski, A. Bałazy, L. Gradoń, Application of nanofibers to improve the filtration efficiency of the most penetrating aerosol particles in fibrous filters, Chemical Engineering Science, Vol. 61, No. 20, pp. 6804-6815, 2006. [22]        C. Harris, D. Roekaerts, F. Rosendal, F. Buitendijk, P. Daskopoulos, A. Vreenegoor, H. Wang, Computational fluid dynamics for chemical reactor engineering, Chemical Engineering Science, Vol. 51, No. 10, pp. 1569-1594, 1996. [23]        S. Fotovati, H. V. Tafreshi, B. Pourdeyhimi, Influence of fiber orientation distribution on performance of aerosol filtration media, Chemical Engineering Science, Vol. 65, No. 18, pp. 5285-5293, 2010. [24]        A. Li, G. Ahmadi, Dispersion and deposition of spherical particles from point sources in a turbulent channel flow, Aerosol science and technology, Vol. 16, No. 4, pp. 209-226, 1992. [25]        J. Q. Feng, A computational study of particle deposition patterns from a circular laminar jet, arXiv preprint arXiv:1608.04605, 2016. [26]        R. Mead-Hunter, A. J. King, G. Kasper, B. J. Mullins, Computational fluid dynamics (CFD) simulation of liquid aerosol coalescing filters, Journal of Aerosol Science, Vol. 61, pp. 36-49, 2013. [27]        G. B. Macpherson, N. Nordin, H. G. Weller, Particle tracking in unstructured, arbitrary polyhedral meshes for use in CFD and molecular dynamics, International Journal for Numerical Methods in Biomedical Engineering, Vol. 25, No. 3, pp. 263-273, 2009. [28]        A. Saleh, S. Hosseini, H. V. Tafreshi, B. Pourdeyhimi, 3-D microscale simulation of dust-loading in thin flat-sheet filters: a comparison with 1-D macroscale simulations, Chemical Engineering Science, Vol. 99, pp. 284-291, 2013. [29]        H. Wang, H. Zhao, Z. Guo, C. Zheng, Numerical simulation of particle capture process of fibrous filters using Lattice Boltzmann two-phase flow model, Powder technology, Vol. 227, pp. 111-122, 2012.

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