Occurrence of a Swirling Vortex without an Intake

In this study, mechanisms that cause the occurrence of a swirling vortex without an intake are explained. There more than one different reasons which may air-core or swirling-vortex flow filament within ambient fluid. An can also occur in fluid media provided coaxial subsurface depressions and thereby imaginary spherical sink surface sectors hydraulically developed by any means (such as rotation mass sector-form, impinging penetrating jet flow, continuously entering solid body string etc.). Although studies related to case be found available literature, there currently no explains detail. it is showed causes for but main mechanism development identical all cases.