Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Vladimir Shtern"'
Publikováno v:
ACS Engineering Au, Vol 2, Iss 5, Pp 406-420 (2022)
Externí odkaz:
https://doaj.org/article/f5985055b15d4263bfc39c42bff096f3
Autor:
Vladimir Shtern
A cell, whose spatial extent is small compared with a surrounding flow, can develop inside a vortex. Such cells, often referred to as vortex breakdown bubbles, provide stable and clean flame in combustion chambers; they also reduce the lift force of
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
Looking for an optimal flow shape for culture growth in vortex bioreactors, an intriguing and impressive structure has been observed that mimics the strong swirling flows in the atmosphere (tornado) and ocean (waterspout). To better understand the fl
Autor:
Sreekanth Pannala, Lei Chen, David West, Santosh J. Shanbhogue, Vladimir Shtern, Ahmed F. Ghoniem
Publikováno v:
Industrial & Engineering Chemistry Research. 60:7443-7453
A novel high-swirl reactor ANJEVOC-CP (annular jet vortex chamber for combustion pyrolysis) was designed for producing high-value chemicals such as alkynes and olefins from natural gas. In such a s...
Publikováno v:
Physics of Fluids. 35:031705
This experimental study reveals a striking nonlinear-physics phenomenon of fundamental and practical interest—changing conditions at the interface of two swirling immiscible fluids filling a vertical cylindrical container. To this end, we use a new
Autor:
Vladimir Shtern, Igor V. Naumov
Publikováno v:
Journal of Engineering Thermophysics. 30:19-39
This paper reviews counterflows, double counterflows, and circulation cells in vortex motion and argues that all these seemingly paradoxical phenomena can be caused by a common swirl-decay mechanism (SDM). It is shown that the SDM explains (a) the co
Publikováno v:
Journal of Engineering Thermophysics. 29:49-66
This experimental and numerical work explains why a vortex breakdown bubble first emerges and then disappears as the fluid rotation speeds up. To this end, we explore a flow in a sealed cylindrical container with one end disk rotating and all other w
Publikováno v:
AIChE Journal. 64:1859-1873
The hydrodynamics of secondary flow phenomena in a disc-shaped gas vortex unit (GVU) is investigated using experimentally validated numerical simulations. The simulation using ANSYS FLUENT® v.14a reveals the development of a backflow region along th
Publikováno v:
European Journal of Mechanics - B/Fluids. 67:377-384
This numerical study analyzes the stability of a steady axisymmetric air–water flow driven by a rotating top disk in a sealed semispherical container. A motivation is possible applications in aerial bioreactors. The centrifugal force pushes the air
Autor:
Arturo Gonzalez-Quiroga, Kevin Van Geem, Guy B. Marin, Laurien Vandewalle, Patrice Perreault, Vladimir Shtern
Publikováno v:
Chemical Engineering and Processing-Process Intensification
Chemical engineering and processing
Chemical engineering and processing
Vortex reactors take advantage of the synergy between enhanced heat and mass transfer rates and multifunctional phenomena at different temporal and spatial scales. Proof-of-concept experiments with our novel and innovative STAtor-Rotor VOrtex Chamber