Dissertation/Thesis Abstract

Numerical Study of Plateau-Rayleigh Instability
by James, Matthew, M.S., Southern Illinois University at Edwardsville, 2014, 64; 1556739
Abstract (Summary)

The Plateau-Rayleigh instability is the breakup of a cylindrical water jet into droplets. This paper examined the general computational behavior of a laminar water jet at low Weber numbers. Due to computer computational limitations, the following was assumed: two dimensional, axisymmetric, and constant surface tension flow. Gambit was used to create the computational domain while FLUENT was used to solve for the flow field variables. A literature review yielded that the previous assumptions were acceptable to sufficiently analyze the problem.

This paper provides significant insight into the various qualitative aspects of a jet undergoing Plateau-Rayleigh instability. Contour plots for phase, gauge pressure, velocity magnitude, and vorticity are discussed and displayed. Data plots were created along the central and radial axis of the jet for various times to show the spatial and temporal dependencies on the flow field variables.

Basic statistics was applied to provide a piecewise-linear fit for both the nondimensional jet length and standard deviation of the non-dimensional jet length. The fit was compared to experimental results at two points and the percent error for the mean jet length was less than 16%. The fits should provide individuals with a reasonable estimate for the jet length of a naturally disturbed low viscous fluid at low Weber numbers.

Indexing (document details)
Advisor: Molki, Majid
Commitee: Darabi, Jeff, Yan, Terry
School: Southern Illinois University at Edwardsville
Department: Mechanical and Industrial Engineering
School Location: United States -- Illinois
Source: MAI 53/01M(E), Masters Abstracts International
Subjects: Mechanical engineering
Keywords: Capillary instability, Cfd, Numerical analysis
Publication Number: 1556739
ISBN: 9781303927348
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