Nonlinear spacial instability of a fluid sheetThe mechanism of nonlinear distortion of a fluid sheet leading to atomization is investigated numerically with the use of vortex dynamics and experimentally by means of holography. The configuration investigated consists of a planar fluid sheet emerging from a rectangular slit with and without coflowing air. The numerical model is two-dimensional, inviscid, and includes surface tension effects. The experimental results indicate the existence of well-defined three-dimensional structures. These are formed mainly by the nonlinear interaction of transverse and streamwise disturbances. The transverse disturbances are associated with the Kelvin-Helmholtz instability while the streamwise disturbances appear related to streamwise vortices possibly originating inside the nozzle.
Document ID
19900032637
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rangel, R. H. (California, University Irvine, United States)
Hess, C. F. (MetroLaser Irvine, CA, United States)