Temporal instability analysis of a confined non-Newtonian liquid jet with heat and mass transfer

Wang, Xintao; Ning, Zhi; Lü, Ming

doi:10.1016/j.euromechflu.2020.07.005

Cited by 13 publications

(2 citation statements)

References 22 publications

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“…Although, confined jets have been thoroughly studied in literature (Rajaratnam, 1976 ; Rehab et al, 1997 ; Kandakure et al, 2008 ) and still is a highly active field of research for various applications (Wang et al, 2020 ; Pathikonda et al, 2021 ), studies on highly confined jets such as a cannula inserted in a vessel are few. Moreover, commonly the co-flow in previous studies have been larger than the jet flow (for example flame stabilization), and not focusing on a situation where the co-flow is slower than the jet flow as may occur for cannula flows.…”

Section: Introductionmentioning

confidence: 99%

Flow Dynamics and Mixing in Extracorporeal Support: A Study of the Return Cannula

Lemétayer

Broman

Wittberg

2021

Front. Bioeng. Biotechnol.

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Cannulation strategies in medical treatment such as in extracorporeal life support along with the associated cannula position, orientation and design, affects the mixing and the mechanical shear stress appearing in the flow field. This in turn influences platelet activation state and blood cell destruction. In this study, a co-flowing confined jet similar to a return cannula flow configuration found in extracorporeal membrane oxygenation was investigated experimentally. Cannula diameters, flow rate ratios between the jet and the co-flow and cannula position were studied using Particle Image Velocimetry and Planar Laser Induced Fluorescence. The jet was turbulent for all but two cases, in which a transitional regime was observed. The mixing, governed by flow entrainment, shear layer induced vortices and a backflow along the vessel wall, was found to require 9–12 cannula diameters to reach a fully homogeneous mixture. This can be compared to the 22–30 cannula diameters needed to obtain a fully developed flow. Although not significantly affecting mixing characteristics, cannula position altered the development of the flow structures, and hence the shear stress characteristics.

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Section: Introductionmentioning

confidence: 99%

Flow Dynamics and Mixing in Extracorporeal Support: A Study of the Return Cannula

Lemétayer

Broman

Wittberg

2021

Front. Bioeng. Biotechnol.

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“…29 These conditions were extensively used by Nayak and Chakraborty, 30 Lee, 31 Fu et al 32 for inviscid fluids and Kim et al, 33 Awasthi, [34][35][36] Jia et al, 37 Fu et al 38 for viscous/viscoelastic fluids. Some authors [39][40] considered the power-law viscoelastic fluid but in these cases second fluid was inviscid.…”

Section: Introductionmentioning

confidence: 99%

Stability characteristics of Walter’s B viscoelastic fluid in a cylindrical configuration with heat transfer

Awasthi

Dharamendra

Yadav

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The stability characteristics of the viscous fluid–viscoelastic fluid interface are investigated in a region confined by two rigid cylindrical surfaces. Walter’s B viscoelastic fluid is taken for the analysis and the fluid phases are transferring heat along with mass from one phase to the other. The gravitational acceleration effect is neglected and therefore, the interface is unstable due to surface tension. Using the linear stability analysis, the implicit expression for the critical wave number is derived analytically in terms of associated physical parameters and solved through the Newton–Raphson method. The various plots are made in terms of perturbations growth rate and critical wave number showing the behavior of flow variables. It is found that the instability of the interface decreases if the transfer of heat is increased. Walter’s B viscoelastic fluid interface is more unstable than the equivalent Newtonian fluid interface. The density of Walter’s B fluid resists the perturbation’s growth while viscoelasticity has an inverse effect.

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Impact of heat and mass transport on Rayleigh–Taylor instability of Walter’s B viscoelastic fluid layer

Shukla

Awasthi

singh

2023

Microgravity Sci. Technol.

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Temporal instability analysis of a confined non-Newtonian liquid jet with heat and mass transfer

Cited by 13 publications

References 22 publications

Flow Dynamics and Mixing in Extracorporeal Support: A Study of the Return Cannula

Flow Dynamics and Mixing in Extracorporeal Support: A Study of the Return Cannula

Stability characteristics of Walter’s B viscoelastic fluid in a cylindrical configuration with heat transfer

Impact of heat and mass transport on Rayleigh–Taylor instability of Walter’s B viscoelastic fluid layer

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