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

Volumes:
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.v20.i1.60
pages 71-83

MODELING SUBGRID-SCALE MIXING OF VAPOR IN DIESEL SPRAYS USING JET THEORY

Neerav Abani
Reacting Gas Dynamics Laboratory
Rolf D. Reitz
Engine Research Center, University of Wisconsin-Madison, Rm 1018A, 1500 Engineering Drive, Madison, Wisconsin 53706, USA

ABSTRACT

It is widely known that mixing in reacting sprays is an important factor in the determination of the flame lift-off length, which is the location where the flame stabilizes. These details can be captured with computational techniques using computational fluid dynamics with a very fine mesh resolution. Use of a coarse resolution overpredicts mixing due to large numerical diffusion and thus reduces the predicted lift-off length. Even though a recently developed gas jet spray model improves the prediction of the spray structure with coarse mesh resolution, predictions of vapor mixing in evaporating sprays are still mesh-dependent. In this study, a subgrid-scale model based on classical jet theory is presented, where the vapor-air mixing is modeled with a combined Lagrangian and Eulerian approach. The vapor is transported as a Lagrangian particle consistent with jet mixing and transport theory until the jet mixing is resolved by the mesh scale. In this way, the results show improved predictions of vapor tip penetration and flame lift-off length using coarse-mesh resolutions. The new model offers a potential tool for investigating reacting sprays using coarser mesh resolution to save computational time for complete cycle simulations of internal combustion diesel engines.


Articles with similar content:

LARGE EDDY SIMULATION OF A TURBULENT NON-PREMIXED FLAME
TSFP DIGITAL LIBRARY ONLINE, Vol.3, 2003, issue
Marco Kupiainen, Christer Fureby
HIGH-FIDELITY SIMULATION OF FUEL ATOMIZATION IN A REALISTIC SWIRLING FLOW INJECTOR
Atomization and Sprays, Vol.23, 2013, issue 11
Marios Soteriou, Xiaoyi Li
EMBEDDED DNS CONCEPT FOR SIMULATING THE PRIMARY BREAKUP OF AN AIRBLAST ATOMIZER
Atomization and Sprays, Vol.26, 2016, issue 3
Johannes Janicka, Amsini Sadiki, Benjamin Sauer
NUMERICAL INVESTIGATION ON THE DISINTEGRATION OF ROUND TURBULENT LIQUID JETS USING LES/VOF TECHNIQUES
Atomization and Sprays, Vol.18, 2008, issue 7
Vedanth Srinivasan, Kozo Saito, Abraham J. Salazar
A COMPARATIVE RANS/LES STUDY OF TRANSIENT GAS JETS AND SPRAYS UNDER DIESEL CONDITIONS
Atomization and Sprays, Vol.17, 2007, issue 5
Xi Jiang, Hua Zhao, Mariafrancesca Valentino