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Author Sahu, K. C. ♦ Govindarajan, R.
Source IIT Hyderabad
Content type Text
Publisher Cambridge University Press
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Chemical engineering
Subject Keyword Chemical engineering
Abstract The stability of a mixing layer made up of two miscible fluids, with a viscosity-stratified layer between them, is studied. The two fluids are of the same density. It is shown that unlike other viscosity-stratified shear flows, where species diffusivity is a dominant factor determining stability, species diffusivity variations over orders of magnitude do not change the answer to any noticeable degree in this case. Viscosity stratification, however, does matter, and can stabilize or destabilize the flow, depending on whether the layer of varying velocity is located within the less or more viscous fluid. By making an inviscid model flow with a slope change across the 'viscosity' interface, we show that viscous and inviscid results are in qualitative agreement. The absolute instability of the flow can also be significantly altered by viscosity stratification.
ISSN 00221120
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-01-01
Page Count 23
Starting Page 626
Ending Page 648