Abstract
A flow of silicon fluid in the gap between eccentric cylinders was studied experimentally. The condition of gaseous cavitation inception during the rotation of internal cylinder was considered. It was shown that at reduction of the gap between cylinders Saffman–Taylor instability appeared on surface of the internal cylinder and then gaseous cavitation was observed. Possibility of one uniform gas formation appearance under this type of instability was demonstrated.
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Abbreviations
- H:
-
The line of minimum gap between cylinders
- H :
-
The value for minimum gap
- H K :
-
The limit value of the gap between the cylinders, above which gaseous cavitation does not occur with increasing Ω
- K:
-
Cavitation bubbles
- L :
-
Depth of gas bubble deformation
- O1, O2 :
-
Circulation zones
- R 1 :
-
Radius of inner cylinder
- R 2 :
-
Radius of outer cylinder
- Re :
-
Reynolds number
- S:
-
Instability “fingers”
- Ω:
-
Inner cylinder rotation speed
- ΩKP :
-
Inner cylinder rotation speed at gaseous cavitation inception
- δ :
-
Eccentricity
- λ :
-
Perturbation wavelength
- v :
-
Kinematic viscosity
- ω :
-
Outer cylinder rotation speed
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Nikolay BUKHARIN. He is a mechanical engineering consultant at Thermofluid Solutions Ltd. (Calgary, Canada). He graduated from Moscow State University, Russia, in 2002 with a MSc degree in applied mathematics and in 2011 from University of Calgary, Canada, with a Ph.D. degree in mechanical engineering. He was working in the laboratory of general aerodynamics (Institute of Mechanics, Moscow State University, Russia), several R&D companies and held two postdoctoral fellowships. He was involved as instrumentation engineer and research scientist in many R&D projects related to heat and mass transfer and experimental fluid mechanics (Binary Fluid Ejector, Bluff Body Aerodynamics and Active Wake Control, Waste Heat, Cavitating Jets, Double-Diffusive Convection, Wind Tunnel Testing of Civil Structures, etc.). Despite many projects were commercial and results could not be disclosed, Dr. BUKHARIN was also involved in fundamental research activities and published several papers collaborating with research groups in France, Saudi Arabia, Canada, and Russia.
Anatoliy MONAKHOV. He defended his Ph.D. thesis at Department of Mechanics and Mathematics, Moscow State University, Russia, in 1986. He is an author and co-author of more than 70 papers in the field of fluid mechanics and an author of 18 patents. He did a significant contribution to hydrodynamic lubrication theory as well as in many other fields of fluid dynamics and is holding several major awards for his scientific achievements.
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Monakhov, A.A., Bukharin, N. Saffman–Taylor instability in eccentric cylinders at gaseous cavitation. Friction 12, 356–362 (2024). https://doi.org/10.1007/s40544-023-0787-x
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DOI: https://doi.org/10.1007/s40544-023-0787-x