On convection-diffusion in non-Newtonian fluid flow in an annulus with wall oscillations

Sebastian, B. T.; Nagarani, P.

doi:10.1140/epjst/e2019-900071-7

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…It was also observed that the inclination angle of a magnetic field and wall parameters have a significant effect on this investigation. Sebastian and Nagarani [13] examined the dispersion of a solute in a Casson fluid flow in an annulus subject to the flow unsteadiness due to the pulsatile pressure gradient and wall oscillations. Results indicate that both qualitative and quantitative changes are seen in mean concentrations in the case of wall movement compared with the case of no wall oscillations.…”

Section: Rheological and Tribological Properties Of Fluidsmentioning

confidence: 99%

Transport properties of nanofluids and applications

Banerjee

Kumar

2019

Eur. Phys. J. Spec. Top.

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Over the past few decades, several researchers have produced a variety of nanofluids that are used as heat transfer fluids in many engineering and technological processes. A nanofluid is a kind of heat transfer fluid, containing nanoparticles (1-100 nm) that are uniformly and stably distributed in a base fluid. Nanoparticles can be metallic/intermetallic compounds, such as Ag, Cu, Ni, Au, Fe, and ceramic compounds such as oxides, sulfides and carbides. Liquids such as water, ethylene glycol, a mixture of water and ethylene glycol, diethylene glycol, polyethylene glycol, engine oil, vegetable oil, paraffin, coconut oil, gear oil, kerosene, and pump oil are used as base fluids. A wide range of applications for nanofluids in different areas have been reported in the literature. These include biomedical applications, lubrication, surface coating, petroleum processing, environmental remediation, and cooling systems for electronics.

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Section: Rheological and Tribological Properties Of Fluidsmentioning

confidence: 99%

Transport properties of nanofluids and applications

Banerjee

Kumar

2019

Eur. Phys. J. Spec. Top.

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“…Rana and Murthy [32] conducted a comparative study of solute dispersion among single and two-phase fluid models using GDM. Other researchers applied GDM to study the dispersion of a solute in non-Newtonian fluid flow [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Herschel-Bulkley Model of Blood Flow through an Asymmetric Stenosed Artery on Unsteady Reactive Solute Dispersion

Zainul Abidin,

Jaafar,

Ismail

2022

MATEMATIKA

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This study examined the effects of chemical reaction, stenosis shape parameter and non-Newtonian behaviour on solute dispersion in blood flow via an asymmetric stenosed artery using the generalised dispersion model (GDM). The Herschel–Bulkley (H-B) fluid model, which consists of a yield stress and power-law index, is used to represent the non-Newtonian characteristics of blood in a narrow artery at a low shear rate. The impact of stenosis shape parameter, chemical reaction, power-law index and plug flow radius on the dispersion coefficient and effective axial diffusion of solute is shown. The findings showed that the aforementioned parameters significantly impact the overall process of the chemically reactive solute in a bulk flow. The dispersion coefficient and effective axial diffusion decreases with an increase in the chemical reaction rate, stenosis shape parameter and power-law index. As time passes, the dispersion process slows and becomes almost constant implying a steady state of diffusion. In short, this study provides further insights into the physiological processes involved in the dispersion of drugs and nutrients in the circulatory system.

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“…With the generalized dispersion model as a tool, Nagarani et al [23] analysed the wall penetration and its consequences on dispersion for Casson fluid flow in a pipe plus in a channel. Sebastian and Nagarani [34], making use of the aforesaid model, treated solutal dispersion in a pulsating annulus in Casson flow in the presence of vibrating walls. Rana et al [28] employed the generalized dispersion model to examine solute movement in unstable blood flow in permeable as well as impermeable miniature arteries drawing on a double-phase Casson model.…”

Section: Introductionmentioning

confidence: 99%

Effect of External Body Acceleration on Solute Dispersion in Unsteady Non-Newtonian Fluid Flow-the Generalized Dispersion Model Approach

Ausaru

Nagarani

2021

Int. J. Appl. Comput. Math

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With a motivation to better understand several transport phenomena in the human body, an attempt was made to theoretically consider the solute dispersion in Casson fluid flow in a tube when impacted by external body acceleration. Under the assumption of a small Womersley number, the equations characterizing the flow are resolved via the perturbation technique. The generalized dispersion method was employed to bring out non-Newtonian rheology effects coupled with pulsatile flow and external body acceleration impact upon the dispersion process. With this method, the mean concentration is expressed with regard to the convection and dispersion coefficients. First, these two transport coefficients are evaluated analytically and hence the mean concentration. The effect of several parameters manifesting within the flow on the dispersion coefficient and the mean concentration is discussed with the help of graphs. This model predicts that an increase in the Womersley as well as the body acceleration frequency parameters will result in a corresponding increase (though not very large) in the dispersion rate. The fluctuations along with the sizeableness of the dispersion coefficient are observed to be increasing with the magnitude of the external body acceleration, the pressure amplitude, and the frequency parameters. The apogee of the mean concentration is found to be decreasing relative to the amplitude of the body acceleration. Additionally, there is also a detected shift of the peak towards the left as the magnitude of the body acceleration increases. This model can be exploited to investigate solute dispersion in blood flow such as measuring the dispersion rate of drugs and the transport of nutrients in blood flow, and can also be applied in indicator dilution technique, etc.

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On convection-diffusion in non-Newtonian fluid flow in an annulus with wall oscillations

Cited by 7 publications

References 34 publications

Transport properties of nanofluids and applications

Transport properties of nanofluids and applications

Herschel-Bulkley Model of Blood Flow through an Asymmetric Stenosed Artery on Unsteady Reactive Solute Dispersion

Effect of External Body Acceleration on Solute Dispersion in Unsteady Non-Newtonian Fluid Flow-the Generalized Dispersion Model Approach

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