Experimental observation of turbulent exchange between vortex ring and surrounding medium of different density

AbstractThe turbulent exchange between a vortex ring and the environment was observed using shadowgraph imaging of the process when the density of the fluid inside and outside of the vortex is different. The characteristic distance of turbulent exchange traversed by the vortex is determined, and the dependence of this distance on the vortex velocity and the related Reynolds number is established.

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Shadowgraph Visualization of Turbulent Exchange between a Vortex Ring and the Environment at Different Densities of the Fluid in the Vortex Interior and Exterior

Technical Physics Letters ◽

10.1134/s1063785019040114 ◽

2019 ◽

Vol 45 (4) ◽

pp. 314-316 ◽

Cited By ~ 1

Author(s):

V. V. Nikulin

Keyword(s):

Vortex Ring ◽

Turbulent Exchange

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Experimental observation of the straining field responsible for vortex ring instability

Comptes Rendus Mécanique ◽

10.1016/j.crme.2003.12.008 ◽

2004 ◽

Vol 332 (3) ◽

pp. 231-236 ◽

Cited By ~ 3

Author(s):

Antoine Dazin ◽

Patrick Dupont ◽

Michel Stanislas

Keyword(s):

Vortex Ring ◽

Experimental Observation

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The Fine Structure of Rat Granulosa Cell Cultures Correlated with Progestin Secretion

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100073209 ◽

1973 ◽

Vol 31 ◽

pp. 552-553

Author(s):

T. M. Crisp ◽

F.R. Denys

Keyword(s):

Fine Structure ◽

Granulosa Cell ◽

Cell Cultures ◽

Single Injection ◽

Surrounding Medium ◽

Petri Dish ◽

Female Rats ◽

Vaginal Smear ◽

Immature Female ◽

Serum Gonadotropin

The purpose of this paper is to present observations on the fine structure of rat granulosa cell cultures grown in the presence of an adenohypophyseal explant and to correlate the morphology of these cells with progestin secretion. Twenty-six day old immature female rats were given a single injection of 5 IU pregnant mares serum gonadotropin (PMS) in order to obtain ovaries with large vesicular follicles. At 66 hrs. post-PMS administration (estrus indicated by vaginal smear cytology), the ovaries were removed and placed in a petri dish containing medium 199 and 100 U penicillin/streptomycin (P/S)/ml. Under a 20X magnification dissecting microscope, some 5-8 vesicular follicles/ovary were punctured and the granulosa cells were expressed into the surrounding medium. The cells were transferred to centrifuge tubes and spun down at 1000 rpm for 5 mins.

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