图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
雾化与喷雾
影响因子: 1.737 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

卷:
卷 30, 2020 卷 29, 2019 卷 28, 2018 卷 27, 2017 卷 26, 2016 卷 25, 2015 卷 24, 2014 卷 23, 2013 卷 22, 2012 卷 21, 2011 卷 20, 2010 卷 19, 2009 卷 18, 2008 卷 17, 2007 卷 16, 2006 卷 15, 2005 卷 14, 2004 卷 13, 2003 卷 12, 2002 卷 11, 2001 卷 10, 2000 卷 9, 1999 卷 8, 1998 卷 7, 1997 卷 6, 1996 卷 5, 1995 卷 4, 1994 卷 3, 1993 卷 2, 1992 卷 1, 1991

雾化与喷雾

DOI: 10.1615/AtomizSpr.v16.i7.50
pages 777-790

QUANTIFYING AIR ATOMIZATION OF VISCOELASTIC FLUIDS THROUGH FLUID RELAXATION TIMES

Yenny Christanti
Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
Lynn M. Walker
Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

ABSTRACT

The industrial need to control the atomization of non-Newtonian fluids necessitates an understanding of the influence of fluid rheology and different viscoelastic properties on this complex process. Previous studies of atomization of a pertinent class of non-Newtonian fluids—polymer solutions—provide a wealth of qualitative observations of the effects of viscoelasticity but are often hindered by the inability to decouple different types of non-Newtonian behavior. Here we use a series of well-characterized polymer solutions whose non-Newtonian behavior are dominated by extensional hardening and utilize a fluid relaxation time τ—the key viscoelastic parameter characterizing the onset of extensional hardening—to quantify the atomization process. The model fluids are sprayed via an air atomizer, and the drop size distributions are measured using a diffraction-based size analyzer. The atomization study shows that viscoelasticity increases the mean drop diameter and broadens the size distribution. We incorporate fluid relaxation time into a drop size correlation that predicts the Sauter mean diameter.


Articles with similar content:

STEADY AND TRANSIENT DROPLET DISPERSION IN AN AIR-ASSIST INTERNALLY MIXING CONE ATOMIZER
Atomization and Sprays, Vol.21, 2011, issue 12
Kelly W. J. Lim, Steven N. Rogak, Sheldon I. Green, Amir Abbas Aliabadi
MEASUREMENT OF EXTENSIONAL VISCOSITY OF POLYMER SOLUTIONS AND ITS EFFECTS ON ATOMIZATION FROM A SPRAY NOZZLE
Atomization and Sprays, Vol.6, 1996, issue 2
R. W. Dexter
FUNDAMENTAL CONSIDERATIONS FOR COAL SLURRY ATOMIZATION
Atomization and Sprays, Vol.15, 2005, issue 5
John P. Dooher
ATOMIZATION OF VISCOELASTIC FLUIDS WITH AN IMPINGING JET INJECTOR: MORPHOLOGY AND PHYSICAL MECHANISM OF THREAD FORMATION
Atomization and Sprays, Vol.27, 2017, issue 4
Michele Negri, Helmut K. Ciezki
PREDICTION OF JET BREAKUP LENGTH IN LIQUID-LIQUID SYSTEMS USING THE RAYLEIGH-TOMOTIKA ANALYSIS
Atomization and Sprays, Vol.7, 1997, issue 5
Tapas K. Das