NDLI: Two-layer viscous instability in a rotating couette device

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Two-layer viscous instability in a rotating couette device

Content Provider	NASA Technical Reports Server (NTRS)
Author	Leighton, David T. Kropnewicki, Tom Gallagher, Christopher McCready, Mark J.
Copyright Year	1994
Description	A novel experiment to study the interfacial shear instability between two liquids is described. Density-matched immiscible liquids are confined between concentric cylinders such that the interface is parallel to the cylinder walls. Interfacial waves that develop because of viscosity differences between the shearing fluids are studied as a function of rotation rate and depth ratio using optical techniques. Conditions neutral stability and the most unstable wavenumber agree reasonably well with predictions from linear stability analysis of the Navier-Stokes equations. Illumination using laser sheets allows precise measurement of the interface shape. Future experiments will verify the correctness of weakly nonlinear theories that describe energy transfer and saturation of wave growth by nonlinear effects. Measurements of solitary wave shapes, that occur far above neutral stability, will be compared to similar measurements for systems that have gravity as an important force to determine how gravity effects large disturbances. These results will be used to interpret slug and annular flow data that have been obtained in other mu g studies.
File Size	833688
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950008152
Archival Resource Key	ark:/13960/t26b22k2t
Language	English
Publisher Date	1994-08-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Navier-stokes Equation Viscosity Stability Tests Confinement Gravitation Nonlinearity Couette Flow Concentric Cylinders Rotation Energy Transfer Annular Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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