Couette flows between various bounding substrates

Mirantsev, L. V.; Abramyan, A. K.

doi:10.1016/j.physleta.2019.126181

Cited by 4 publications

(3 citation statements)

References 43 publications

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“…can be obtained. As a kind of viscous flow, Couette flow is of great significance in engineering, and accurate analytical solutions can be obtained under some conditions [32].…”

Section: Couette Flowmentioning

confidence: 99%

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Yang

et al. 2022

Chin. J. Mech. Eng.

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The research on surface texture is developing from single macro-texture to composite micro-nano texture. The current research on the anti-friction mechanism and theoretical models of textures is relatively weak. Studying the characteristics of different types of surface textures and determining the applicable working conditions of each texture is the focus of current research. In this paper, a mathematical model of hydrodynamic lubrication is established based on Navier–Stokes equations. The FLUENT software is used to simulate and analyze the four texture models, explore the dynamic pressure lubrication characteristics of different texture types, and provide data support for texture optimization. The key variable values required by the mathematical model are obtained through the simulation data. The friction coefficient of the texture under different working conditions was measured through friction and wear experiments, and the mathematical model was verified by the experimental results. The research results show that circular texture is suitable for low to medium speed and high load conditions, chevron texture is suitable for medium to high speed and medium to high load conditions, groove texture is suitable for high speed and low load conditions, and composite texture is suitable for high speed and medium to high load conditions. Comparing the experimental results with the results obtained by the mathematical model, it is found that the two are basically the same in the ranking of the anti-friction performance of different textures, and there is an error of 10%−40% in the friction coefficient value. In this study, a mathematical model of hydrodynamic lubrication was proposed, and the solution method of the optimal surface texture model was determined.

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“…can be obtained. As a kind of viscous flow, Couette flow is of great significance in engineering, and accurate analytical solutions can be obtained under some conditions [32].…”

Section: Couette Flowmentioning

confidence: 99%

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Yang

et al. 2022

Chin. J. Mech. Eng.

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“…But when the flow boundary is relatively simple and the flow parameters are mostly constant, the solution of the flow can be obtained. As a kind of viscous flow, Couette flow is of great significance in engineering, and accurate analytical solutions can be obtained under some conditions [27].…”

Section: Couette Flowmentioning

confidence: 99%

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Yang

et al. 2020

Preprint

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This paper established a mathematical model of hydrodynamic lubrication through theoretical analysis, solved the key variables of the mathematical model through simulation and validated the mathematical model using the experimental results. The purpose is to summarize a set of surface texture theory and optimal selection equations for complex working conditions. After comparing the experimental results with the results obtained by the mathematical model, it is found that the two are basically the same in the ranking of the anti-friction properties of different textures, and there is an error of 10%-40% in the friction coefficient value.

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“…Couette flow is driven by virtue of viscous drag force acting on the fluid, but it may additionally be motivated by an applied pressure gradient in the flow direction. The classical Couette flow problem under various conditions has been widely investigated [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Formation and Topology of vortices in Couette Flow over open cavities

et al. 2020

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The present study investigates the planar Couette flow problem for low Reynolds numbers inside a rectangular duct with a morphing cavity serving as a vortex formation promoter. A finite element code implemented in COMSOL Multiphysics is employed to analyze the effects of the cavity aspect ratio and variations of the Reynolds number on formation and topology of the vortices within the embedded cavity. The obtained results indicate that the cavity height is influential in the number of vortices. It is shown by increasing the Reynolds number, a single vortex tends to move towards the outlet. In addition, streamlines demonstrate that small vortices in vicinity of the cavity corner tend to be enlarged with increase of the Reynolds number. The developed numerical model can be extended to the flow structure of natural systems such as an embayment subjected to parallel-to-shore currents.

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Couette flows between various bounding substrates

Cited by 4 publications

References 43 publications

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Formation and Topology of vortices in Couette Flow over open cavities

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