Impact factor: 0.644
ISSN Print: 1044-5110
You have access to: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
ABSOLUTE AND CONVECTIVE INSTABILITY OF ANNULAR VISCOUS LIQUID JETS IN GAS STREAMS
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, Canada
Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada This article reports the absolute and convective instability of an annular viscous liquid jet with its inner and outer surfaces exposed to inviscid gas streams of unequal velocities. The effects of geometric and various flow parameters are investigated. It is found that both absolute and convective instability exist for para-sinuous and -varicose modes under certain flow conditions. For para-sinuous mode, the annular liquid jet, with an inner gas moving at relatively small velocities, can have either convective or absolute instability, depending on specific flow conditions. However, the jet is of only absolute instability if the inner gas is stationary or moves at sufficiently large velocities. Para-sinuous unstable waves outgrow para-varicose waves and hence dominate the jet instability process, according to both absolute and convective instability analyses. The liquid viscosity has a stabilizing effect on the jet instability, but the gas inertial force shows a fairly complex influence on the absolute instability. The convective growth rates for various inner gas velocities indicate that not only the velocity difference between, but also the absolute velocity of the liquid and gas, determine the jet breakup process.
|Home||Begell Digital Library||eBooks||Journals||References & Proceedings||Research Collections|