Год выпуска: 2013 Автор: Ghobad Amini Издательство: LAP Lambert Academic Publishing Страниц: 160 ISBN: 9783659337727
Описание
The motion of liquid jets ejected from elliptical orifices is studied theoretically and experimentally. In the theoretical part of the study, the linear evolution of initially small disturbances on the inviscid jets is investigated using a three-dimensional analysis. In addition, to study the viscous free-surface flows, an approach based on the Cosserat theory is used. Temporal and spatial analyses are performed and the dispersion equations of waves on the jet column are derived to show the growth rate of disturbances for different modes under various conditions. An equation for the jet profile is suggested which describes the axis-switching phenomenon and breakup for various conditions. The equations are approximated for small and large ellipticities, and well-known dispersion relations of circular and planar jets are retrieved. Experiments are performed to validate the linear results and to investigate the jet velocity profile. Several nozzles with different ellipticities and length...
