Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Atomization and Sprays
Factor de Impacto: 1.262 Factor de Impacto de 5 años: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimir: 1044-5110
ISSN En Línea: 1936-2684

Volumen 29, 2019 Volumen 28, 2018 Volumen 27, 2017 Volumen 26, 2016 Volumen 25, 2015 Volumen 24, 2014 Volumen 23, 2013 Volumen 22, 2012 Volumen 21, 2011 Volumen 20, 2010 Volumen 19, 2009 Volumen 18, 2008 Volumen 17, 2007 Volumen 16, 2006 Volumen 15, 2005 Volumen 14, 2004 Volumen 13, 2003 Volumen 12, 2002 Volumen 11, 2001 Volumen 10, 2000 Volumen 9, 1999 Volumen 8, 1998 Volumen 7, 1997 Volumen 6, 1996 Volumen 5, 1995 Volumen 4, 1994 Volumen 3, 1993 Volumen 2, 1992 Volumen 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v4.i2.60
pages 223-236


Suresh Aggarwal
Department of Mechanical and Industrial Engineering University of Illinois at Chicago
Y. Xiao
Department of Mechanical Engineering, University of Illinois at Chicago, Chicago, Illinois 60680
J. Uthuppan
Department of Mechanical Engineering, University of Illinois at Chicago, Chicago, Illinois 60680


Numerical results are presented to characterize the dependence of particle dispersion on the Stokes number, and to identify the appropriate particle response time and flow time scales used in defining the Stokes number. Two particle-laden shear flows considered for illustrating these scales are a planar shear layer and an axisymmetric jet. Two-dimensional large-scale features of these flows are computed by using the flux-corrected transport (FCT), time step-splitting algorithm. Particles of different sizes are injected into the shear layer and their dispersion behavior is quantified by using a global dispersion function. Results indicate that the particle dispersion maximizes at a certain value of the Stokes number, defined as a ratio of the particle aerodynamic response time to the characteristic flow time. It is argued, however, that a correct flow time can be based on the dominant frequencies associated with the large-scale organized structures, and not just the global velocity and length scales. Results from the present simulation and several experimental studies on particle dispersion are used to support the argument. In addition, the validity of the Stokes drag law in defining the particle response time in realistic two-phase flow is examined.