The formation of orifice-generated vortex rings, at a Reynolds number of 5300 and for a tube-to-orifice diameter ratio of 2.0, is experimentally investigated for stroke-to-diameter ratios of 0.5(0.5)5.0. A significant increase is observed in the production of the total invariants of the ...
The formation, at tube and orifice openings, of vortex rings generated by a piston moving with velocity proportional to time to some power m, is considered. The expansion of the axisymmetric generating flow about the circular forming edge is used in conjunction with the similarity theory of edge...
The subsequent vortex cavitation with the formation of an axial reentrant jet is a reasonable explanation for the large penetration depth of the water jet. That snapping shrimp can reach with their claw-induced flow. Within such a cavitation process, an axial reentrant jet is generated in the ...
High spatial resolution PIV measurements using film recording have yielded detailed instantaneous 2-D velocity fields of the formation of orifice generated vortex rings. The resultant high spatial resolution vorticity distributions enable thelocation and magnitude of regions of both primary and secondary ...
High spatial resolution PIV measurements using film recording have yielded detailed instantaneous 2-D velocity fields of the formation of orifice generated vortex rings. The resultant high spatial resolution vorticity distributions enable the location and magnitude of regions of both primary and secondary ...
Heavier than air, CO2-loaded negative buoyant vortex rings are generated at an orifice opening of variable diameter using a piston-cylinder apparatus and are ejected vertically upwards into ambient atmosphere. Ring formation is investigated using a non-invasive Background-Oriented Schlieren (BOS) ...
A formula for calculating the translational velocity of a vortex ring, generated through an impulsive ejection of fluid from an orifice, is presented. Variation of the translational velocity as a function of the stroke ratio and the non-dimensional mean core radius is calculated. Application of ...
To evaluate the impact of vortex rings in trans-mitral left ventricular filling flows in a physiologically shaped, in-vitro model, we studied a precisely delivered pulsed flow through an orifice with the same dimensional characteristics as the mitral annulus, and with a fully opening bileaflet ...