Published 12 issues per year
ISSN Print: 1044-5110
ISSN Online: 1936-2684
Indexed in
LINEAR INSTABILITY ANALYSIS OF THE VISCOUS LONGITUDINAL PERTURBATION ON AN AIR-BLASTED LIQUID SHEET
ABSTRACT
This article describes the evolution of sinusoidal waves propagating on a water sheet surrounded by two high-velocity co-flowing air streams. The analysis is based on linear instability theory and includes viscosity in both gas and liquid perturbations, while for the stationary velocity profiles the flows have been treated as inviscid. To discern the role of the gas dynamics, air and water velocities have been varied independently. Flow conditions have been selected to compare the numerical predictions with experimental measurements of oscillation frequencies, wavelengths, and growth rates. The dispersion diagrams show a broad viscosity-enhanced zone, a consequence of considering viscosity in the gas perturbation.
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