Centrifugal instability of nanofluids with radial temperature and concentration non-uniformity between co-axial rotating cylinders

Авраменко, А. А.; Tyrinov, A. I.; Shevchuk, Igor V.; Dmitrenko, N.P.

doi:10.1016/j.euromechflu.2016.08.001

Cited by 10 publications

(4 citation statements)

References 44 publications

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“…Fig. 2 Relationship between the wave amplification and the wavenumber at different n and B, when Z = 0.01, Re = 1 000, St = 1, and Kn = 1 [15] Avramenko et al [17] studied the instability of Taylor-Couette flows with an inner cylinder rotating in a curved channel between two concentric cylinders. Based on the derived differential equations, they used the collocation method to determine the critical Taylor number related to flow instability, and then analyzed the effects of Sc, P r, the distance between the concave and convex walls, the nanoparticle density, and the thermophoretic and Brownian diffusion on the critical Taylor number.…”

Section: Hydrodynamic Instabilitymentioning

confidence: 99%

A review on the flow instability of nanofluids

Lin

Yang

2019

Appl. Math. Mech.-Engl. Ed.

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Nanofluid flow occurs in extensive applications, and hence has received widespread attention. The transition of nanofluids from laminar to turbulent flow is an important issue because of the differences in pressure drop and heat transfer between laminar and turbulent flow. Nanofluids will become unstable when they depart from the thermal equilibrium or dynamic equilibrium state. This paper conducts a brief review of research on the flow instability of nanofluids, including hydrodynamic instability and thermal instability. Some open questions on the subject are also identified.

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Section: Hydrodynamic Instabilitymentioning

confidence: 99%

A review on the flow instability of nanofluids

Lin

Yang

2019

Appl. Math. Mech.-Engl. Ed.

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“…Ryzhkov (2006) solved the equations of double diffusive convection in a binary mixture with Soret effect and investigated the influence of Soret effect and layer thickness on the flow type is investigated. Avramenko et al (2016) focused on a theoretical study of instability of Taylor–Couette flows of nanofluids in a curved channel formed by concentric cylindrical surfaces. Their results obtained that understanding of the mechanisms of centrifugal instability in nanofluids and thereby optimise the functionality of centrifugal devices used to prepare nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Natural convection process endorsed in coaxial duct with Soret/Dufour effect

Shah

Öztop

Haq

et al. 2022

HFF

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Purpose The purpose of this paper is to analyse the buoyancy flow, mass and heat transfer in coaxial duct under Soret and Dufour effect. The combined effects of the thermal-diffusion and diffusion-thermo coefficients, as well as the Schmidt number, on natural convection in a heated lower coaxial curve were explored using the proposed physical model. The Dufour and Soret effects are taken into consideration in the energy and concentration equations, respectively. Design/methodology/approach The dominating mathematical models are converted into a set of non-linear coupled partial differential equations, which are solved using a numerical approach. The controlling non-linear boundary value problem is numerically solved using the penalty finite element method with Galerkin’s weighted residual scheme over the entire variety of essential parameters. Findings It was observed that different parameters were tested such as heat generation or absorption coefficient, buoyancy ratio, Soret coefficient, Dufour coefficient, Lewis number and Rayleigh number. Effect of Rayleigh number, absorption/generation and Dufour coefficient on isotherm are significantly reported. For greater values of Lewis number, maximum mass transfer in duct in the form of molecular particles is produced. Buoyancy ratio parameter decreases the average rate of heat flow and increases its mass transfer. Originality/value The main originality of this work is to make an application of Soret and Dufour effects in a coaxial duct in the presence of source sink.

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“…In [12], Tagawa and others studied Couette -Taylor flow in the presence of a magnetic field using numerical method, it was discovered that the radial and azimuthal velocity can be stabilized by a vertical uniform magnetic field and that the critical Reynolds number for the flow transition increases with increase in the Hartmann number. A research on Centrifugal instability of nanofluid with radial temperature and concentration non-uniformity between coaxial rotating cylinders showed that negative temperature gradients stabilize flow, whereas positive temperature gradients destabilize it [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on effect of magnetic field on flow dynamics of iron (III) oxide (Fe2O3) - water based nanofluid using Taylor Couette flow apparatus

Muritala¹,

Adio²,

Luqman³

et al. 2022

Nig. J. Tech.

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Experimental investigation of magnetic field effect on Fe3O4-Water based nanofluid undergoing Taylor Couette flow is of great importance since some lubricating systems are replicas of Taylor Couette flow. In this study several experiments were carried out to investigate the influence of nanoparticle concentration on the vortex dynamics of a water based Newtonian nanofluid formulated from Fe2O3 in the presence and absence of magnetic field. Flow dynamics was studied in relation to flow transition, stability, hysteresis and effect of magnetism on these properties. Flow regimes covered in this study include Circular Couette flow, Taylor vortex flow, wavy Vortex flow and Modulated Wavy vortex flow. Bifurcation parameters are nanoparticle volume fraction, inner cylinder rotating frequency and Reynolds number. Experiments were performed on distilled water and Fe3O4-Water based nanofluid to understand its behavior in Taylor Couette apparatus. Critical Reynolds number, Azimuthal wavenumber and travelling waves frequency was recorded for each nanoparticle volume fraction. Power Spectral Analysis of nanofluid flow was carried out using video data from the experiment. It was observed that critical frequency for various transitions decrease with nanoparticle volume fraction for nanofluid in the presence of magnetic field but an inconsistent pattern was observed for nanofluid in the absence of magnetic field. These results show that magnetic field and nanoparticle volume fraction greatly influence the behavior of the flow.

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Centrifugal instability of nanofluids with radial temperature and concentration non-uniformity between co-axial rotating cylinders

Cited by 10 publications

References 44 publications

A review on the flow instability of nanofluids

A review on the flow instability of nanofluids

Natural convection process endorsed in coaxial duct with Soret/Dufour effect

Experimental study on effect of magnetic field on flow dynamics of iron (III) oxide (Fe2O3) - water based nanofluid using Taylor Couette flow apparatus

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