Characterization of Rayleigh–Taylor Instability at the Fluid–Fluid Interface

Raj, Nihal; Karthick, S.

doi:10.1007/978-981-15-4488-0_35

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…When the interface of two liquids with different densities is subjected to an external force, the interface is disturbed and instability occurs. Interface instability can be categorized as Rayleigh-Taylor, Richmyer-Meshkov, or KH instability, which are caused by gravity fields [11], shock waves [12,13], and speed differences [14], respectively. When the magnetic liquid rotates and seals, the rotation of the main shaft drives the rotation of the liquid in the sealed cavity; the speed difference between the magnetic liquid and liquid in the sealed cavity causes KH instability.…”

Section: Introductionmentioning

confidence: 99%

Turbulence Intensity Characteristics of a Magnetoliquid Seal Interface in a Liquid Environment

Wang

et al. 2021

Coatings

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In a liquid environment, the turbulence intensity of the interfacial layer between the magnetic and sealing medium fluids in magnetic liquid seals directly affects the layer stability. Reducing the maximum turbulence intensity of the fluid interface layer effectively improves the stability of the magnetic fluid rotary seal. In this study, we simulated magnetic fluid sealing devices with different structures in liquid environments using the FLUENT software. The simulation results were verified through experimental analyses of the turbulence intensity at the sealing interface. The maximum turbulence intensity of the liquid interface layer increased with increasing shaft speed. At the same speed, the turbulence intensity was maximized at the shaft interface before gradually decreasing in a multistage linear pattern along the radial direction. A magnetic liquid seal with an optimized structure (OS) in the liquid environment was designed based on these results. The maximum turbulence intensity of the liquid interface layer in the OS was independent of the rotation speed and was more than 20% lower than that that in the traditional structure. These results provide a reference for designing magnetic liquid sealing devices.

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Section: Introductionmentioning

confidence: 99%

Turbulence Intensity Characteristics of a Magnetoliquid Seal Interface in a Liquid Environment

Wang

et al. 2021

Coatings

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“…When the interface of two liquids with different densities is subjected to external force, the interface is disturbed and instability occurs. Interface instability is divided into Rayleigh-Taylor (RT) instability caused by gravity fields [11] , Richmyer-Meshkov (RM) instability caused by shock waves [12 -13] , and KH instability caused by speed differences [14] . When the magnetic liquid rotates and seals, the rotation of the main shaft drives the rotation of the liquid in the sealed cavity; the speed difference between the magnetic liquid and the liquid in the sealed cavity causes KH instability.…”

Section: Introductionmentioning

confidence: 99%

Effect of turbulence intensity of fluid medium interface layer on magnetic liquid seal in liquid environment

Cheng

et al. 2021

Preprint

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In a liquid environment, the instability of the interface layer of the rotating fluid medium is one of the main causes for the failure of magnetic liquid seals. The turbulence intensity of the interfacial layer between the magnetic and the sealing medium fluids in magnetic liquid seals directly affects the layer stability. Reducing the maximum turbulence intensity is an effective way to improve the stability of the magnetic fluid rotating seal. In this study, we simulated magnetic fluid sealing devices with different structures in liquid environments using FLUENT software. The simulation results are verified through experimental analyses and the turbulence intensity at the sealing interface is analyzed. We simulated the magnetic circuit using Maxwell software, and compared the difference between the optimized and traditional structures. The results show that the maximum turbulence intensity of the liquid interface layer increases with the increasing shaft speed. At the same speed, the turbulence intensity is maximized at the shaft interface before gradually decreasing in a multistage linear pattern along the radial direction. The turbulence intensity at the interface of the spindle is relatively large, which seriously affects the stability of the interface. Based on these results, the optimized structure (OS) of the magnetic liquid seal in the liquid environment is designed. The maximum turbulence intensity of the liquid interface layer in the OS is more than 20% lower than that in the traditional structure (TS), and it is independent of the rotation speed. The optimized and the traditional structures have the same magnetic induction intensity distribution at the sealing clearance. The maximum magnetic induction intensity of the OS is 6.25% higher than that of the traditional one. These results provide a reference for designing magnetic liquid sealing devices.

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Theoretical Characterisation of Standing Waves Responsible for Sloshing in Stored and Moving Liquid Containers

Karthick¹,

Satish²,

Kailash³

et al. 2022

Recent Advances in Energy Technologies

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Characterization of Rayleigh–Taylor Instability at the Fluid–Fluid Interface

Cited by 3 publications

References 11 publications

Turbulence Intensity Characteristics of a Magnetoliquid Seal Interface in a Liquid Environment

Turbulence Intensity Characteristics of a Magnetoliquid Seal Interface in a Liquid Environment

Effect of turbulence intensity of fluid medium interface layer on magnetic liquid seal in liquid environment

Theoretical Characterisation of Standing Waves Responsible for Sloshing in Stored and Moving Liquid Containers

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