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Journal of Porous Media
Импакт фактор: 1.49 5-летний Импакт фактор: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Печать: 1091-028X
ISSN Онлайн: 1934-0508

Выпуски:
Том 22, 2019 Том 21, 2018 Том 20, 2017 Том 19, 2016 Том 18, 2015 Том 17, 2014 Том 16, 2013 Том 15, 2012 Том 14, 2011 Том 13, 2010 Том 12, 2009 Том 11, 2008 Том 10, 2007 Том 9, 2006 Том 8, 2005 Том 7, 2004 Том 6, 2003 Том 5, 2002 Том 4, 2001 Том 3, 2000 Том 2, 1999 Том 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v14.i6.30
pages 495-506

EFFECTS OF THE REACTION RATE AND THE LARGE SIZE DEFORMABLE AEROSOLS ON DISPERSION IN ATMOSPHERIC FLOW REGARDED AS THE TURBULENT FLUID SATURATED POROUS MEDIA

N. Rudraiah
National Research Institute for Applied Mathematics, 492/G, 7th Cross, 7th Block (West), Jayanagar, Bangalore 560 082, and UGC-DSA Centre in Fluid Mechanics, Department of Mathematics, Bangalore University, Bangalore 560 001, India
N. Devaraju
UGC-Center for Advanced Studies in Fluid Mechanics, Department of Mathematics, Bangalore University; National Research Institute for Applied Mathematics, 462/G, 7th Cross, 7th Block (West), Jayana-gar, Bangalore 560 070, India

Краткое описание

This paper describes the use of Taylor's analysis to study the dispersion of large size aerosols as the mixture of deformable agglomeration and coalescence of aerosols in the atmosphere. A proper theory is developed incorporating the resistance offered by sparsely packed aerosols following the Darcy-Brinkman model, including elastic deformation. Analytical solutions for velocity are obtained using a regular perturbation technique. Concentration distribution is determined using the advection of concentration by the atmospheric turbulent fluid in the presence of an irreversible first-order chemical reaction and a source in the boundary condition. It is shown that the aerosols are dispersed relative to a plane moving with the mean speed of atmospheric turbulent fluid as well as the mean speed of agglomeration of aerosol with a relative diffusion coefficient, D β, called the Taylor dispersion coefficient. This D β is numerically computed and the results reveal that D β increases with an increase in Re and Pe, but decreases with an increase in σρ, β1, and R1, where Re is the Reynolds number, σρ is the porous parameter, R1 is the deformation parameter, and β1 is the reaction rate parameter. This decrease in D β, with an increase in the porous parameter and an increase in the reaction rate parameter is favorable for the formation of clouds in the atmosphere.

Ключевые слова: dispersion, aerosols, deformation, atmosphere

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