Temporal Instability of Swirling Annular Layer With Mass Transfer Through Porous Media

Awasthi, Mukesh Kumar; Devi, M. Ramya

doi:10.1615/specialtopicsrevporousmedia.2020030018

Cited by 4 publications

(2 citation statements)

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“…In Refs. [9][10][11], we investigated the stability dynamics of diverse interfaces experiencing heat/mass transfer in cylindrical geometries. Recently, the swirling effect on the instability of interfaces formed with Rivlin-Ericksen and Walter's B fluid inclusive of mass/heat transport was investigate [12,13].…”

Section: Introductionmentioning

confidence: 99%

Swirling Capillary Instability of Rivlin–Ericksen Liquid with Heat Transfer and Axial Electric Field

Yadav,

Awasthi,

Kumar

et al. 2024

Physics

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The mutual influences of the electric field, rotation, and heat transmission find applications in controlled drug delivery systems, precise microfluidic manipulation, and advanced materials’ processing techniques due to their ability to tailor fluid behavior and surface morphology with enhanced precision and efficiency. Capillary instability has widespread relevance in various natural and industrial processes, ranging from the breakup of liquid jets and the formation of droplets in inkjet printing to the dynamics of thin liquid films and the behavior of liquid bridges in microgravity environments. This study examines the swirling impact on the instability arising from the capillary effects at the boundary of Rivlin–Ericksen and viscous liquids, influenced by an axial electric field, heat, and mass transmission. Capillary instability arises when the cohesive forces at the interface between two fluids are disrupted by perturbations, leading to the formation of characteristic patterns such as waves or droplets. The influence of gravity and fluid flow velocity is disregarded in the context of capillary instability analyses. The annular region is formed by two cylinders: one containing a viscous fluid and the other a Rivlin–Ericksen viscoelastic fluid. The Rivlin–Ericksen model is pivotal for comprehending the characteristics of viscoelastic fluids, widely utilized in industrial and biological contexts. It precisely characterizes their rheological complexities, encompassing elasticity and viscosity, critical for forecasting flow dynamics in polymer processing, food production, and drug delivery. Moreover, its applications extend to biomedical engineering, offering insights crucial for medical device design and understanding biological phenomena like blood flow. The inside cylinder remains stationary, and the outside cylinder rotates at a steady pace. A numerically analyzed quadratic growth rate is obtained from perturbed equations using potential flow theory and the Rivlin–Ericksen fluid model. The findings demonstrate enhanced stability due to the heat and mass transfer and increased stability from swirling. Notably, the heat transfer stabilizes the interface, while the density ratio and centrifuge number also impact stability. An axial electric field exhibits a dual effect, with certain permittivity and conductivity ratios causing perturbation growth decay or expansion.

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Section: Introductionmentioning

confidence: 99%

Swirling Capillary Instability of Rivlin–Ericksen Liquid with Heat Transfer and Axial Electric Field

Yadav,

Awasthi,

Kumar

et al. 2024

Physics

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“…They observed that the system's instability is augmented when small Weber numbers are considered and gets suppressed at larger Weber numbers due to confinement. Lastly, Awasthi et al [13][14][15][16][17] scrutinized the stability of the various interfaces subject to heat and mass transfer between two concentric cylinders. They discovered that when the inner cylinder rotates, asymmetric disturbances destabilize the interface, whereas rotation of the outer cylinder induces stability.…”

Section: Introductionmentioning

confidence: 99%

Impact of swirling on capillary instability of Walter’s B viscoelastic fluid-viscous fluid interface with heat and mass transfer

Srija,

Singh,

Awasthi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The multifaceted applications of swirling interfaces featuring heat and mass transfer extend across diverse industries, encompassing energy, manufacturing, healthcare, and environmental protection. The present study is concerned with examining the swirling impact on the capillary instability occurring at the interface between a Walter’s B viscoelastic fluid and a viscous fluid, under the influence of heat and mass transfer. The setup consists of two rigid cylinders that form an annular region filled with viscous fluid on the inner side and Walter’s B viscoelastic fluid on the outer side. The outer cylinder rotates at a constant angular velocity, while the inner cylinder remains stationary. The study employs the Walter’s B viscoelastic model, which conforms to the potential flow theory for viscoelastic fluids. The proposed flow theory disregards tangential stresses and balances the difference in normal viscous stresses with the surface force at the free boundary. The perturbed equations yield a quadratic equation in growth rate, which is numerically analyzed. The results show that heat and mass transfer enhance the interface’s stability and swirling makes it more stable. Moreover, it is noteworthy that the Weber number exerts a stabilizing influence on the interface, while the density ratio also plays a role in promoting its stability. The centrifuge number exhibits a counteractive effect by impeding interface growth, thus contributing to its stabilization.

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Study of rotating liquid–vapor interface with mass transfer through porous media

Agarwal

Awasthi

Kumar

2021

Materials Today: Proceedings

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Temporal Instability of Swirling Annular Layer With Mass Transfer Through Porous Media

Cited by 4 publications

References 0 publications

Swirling Capillary Instability of Rivlin–Ericksen Liquid with Heat Transfer and Axial Electric Field

Swirling Capillary Instability of Rivlin–Ericksen Liquid with Heat Transfer and Axial Electric Field

Impact of swirling on capillary instability of Walter’s B viscoelastic fluid-viscous fluid interface with heat and mass transfer

Study of rotating liquid–vapor interface with mass transfer through porous media

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