Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Atomization and Sprays
IF: 1.262 5-Year IF: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Print: 1044-5110
ISSN Online: 1936-2684

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

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2017017448
pages 303-317


Moritz Ertl
Institute of Aerospace Thermodynamics, University of Stuttgart, 70569 Stuttgart, Germany
Bernhard Weigand
Universität Stuttgart


The goal of this work is to improve our understanding of the primary breakup of jets from shear-thinning non-Newtonian liquids. We use direct numerical simulations (DNS) with the volume of fluid method for tracking of the liquid phase and piecewise linear interface calculations for a sharp interface reconstruction. We calculate the shear-thinning viscosity with the Carreau-Yasuda model. We use the inflow velocity profile as well as the shear-thinning properties as varying parameters for different simulations. Different methods of investigation are presented and applied to the simulations. We visualize and describe the influence of shear-thinning viscosity on the breakup process. We quantify the breakup over the liquid surface area and show the influence of different inflow velocities and different shear-thinning viscosities on the breakup. The investigation is refined by analyzing quantities, which define the deformation of the jet surface. A new visualization method is used to track the temporal development of liquid mass. With these methods for analysis we lay a foundation to quantitatively compare different destabilizing parameters and to estimate droplet sizes resulting from the breakup. The combination of these analysis helps to provide a better understanding of shear-thinning breakup in general and brings us closer to predicting resulting droplet sizes.