Two-phase nanofluid over rotating disk with exponential variable thickness

Liu, Chunyan; Ding, Yuping; Zheng, Liancun; Lin, Ping; Li, Ruilin

doi:10.1108/hff-07-2018-0347

Cited by 6 publications

(4 citation statements)

References 35 publications

(42 reference statements)

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“…They accompanied that thermophoretic effect is important in the enhancement of concentration field. Liu et al [21] expressed the importance of nanofluid in steady-state flow generated by a revolving disk of exponential variable thickness. They established that temperature rises with the large Brownian movement force.…”

Section: Introductionmentioning

confidence: 99%

Regression analysis of horizontal magnetic field in thermophysical convective flow of nanofluid

Rauf,

Aslam,

Mushtaq

et al. 2024

Z Angew Math Mech

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The existence of magnetic field is beneficial to stabilize the fluid flow patterns in modern era industrial implications and engineering problems. A constant horizontal magnetized field is implemented to stabilize the swirl viscous fluid flow created by disk rotation. The heat transmission equation is expressed by the variable fluid property that the thermal conductivity is dependent on temperature. Buongiorno nanofluid model is applied to express the role of thermophoresis and Brownian movement. The flow governing equations are normalized through the von Kármán classical similarity variables. The impacts of magnetic and other physical parameters on velocity, thermal and concentration fields are investigated in numerical way using RKF‐45 (Runge–Kutta–Fehlberg) built‐in procedure. The critical part of horizontal magnetic field and dimensionless parameters onto physical quantities such as wall shears, thermal rate, and concentration rate are highlighted. Regression analysis is also performed to evaluate the impact of obtained numerical values of such physical quantities on flow rates. Unlike the familiar impacts of a uniformly applied transverse magnetic field that concerns the velocity field stabilizing and decreasing the thermal rate, it is established that the horizontal magnetized field is valuable for stabilizing/destabilizing the flow phenomenon. The results also matched with the published work in limiting case.

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Section: Introductionmentioning

confidence: 99%

Regression analysis of horizontal magnetic field in thermophysical convective flow of nanofluid

Rauf,

Aslam,

Mushtaq

et al. 2024

Z Angew Math Mech

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“…In our study, we have taken care of this observation and have kept nanoparticle concentration less than 4%. Further readings on the rotating disk phenomenon and associated processes can be found in the literature as Liu et al (2019), Khan et al (2019), Rashid and Liang (2020), Reddy et al (2021) and Javed et al (2021).…”

Section: Introductionmentioning

confidence: 99%

Entropy generation in water conveying nanoparticles flow over a vertically moving rotating surface: Keller box analysis

Kumar,

Sharma,

Makinde

et al. 2023

HFF

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Purpose The purpose of this study is to investigate the entropy generation in different nanofluids flow over a vertically moving rotating disk. Unlike the classical Karman flow, water-based nanofluids have various suspended nanoparticles, namely, Cu, Ag, Al2O3 and TiO2, and the disk is also moving vertically with time-dependent velocity. Design/methodology/approach The Keller box technique numerically solves the governing equations after reduction by suitable similarity transformations. The shear stress and heat transport features, along with flow and temperature fields, are numerically computed for different concentrations of the nanoparticles. Findings This study is done comparatively in between different nanofluids and for the cases of vertical movement of the disk. It is found that heat transfer characteristics rely not only on considered nanofluid but also on disk movement. Moreover, the upward movement of the disk diminishes the heat-transfer characteristics of the fluid for considered nanoparticles. In addition, for the same group of nanoparticles, an entropy generation study is also performed, and an increasing trend is found for all nanoparticles, with alumina nanoparticles dominating the others. Originality/value This research is a novel work on a vertically moving rotating surface for the water-conveying nanoparticle fluid flow with entropy generation analysis. The results were found to be in good agreement in the case of pure fluid.

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“…According to the power function, Hayat et al (2016) and Hayat et al (2017) discussed the flow of nanofluid over a stretching sheet with variable thickness. Under the influence of exponential variable thickness, Liu et al (2019) investigated the three-dimensional flow of a nanofluid on a rotating disk. In addition, Liu et al (2018) used space fractional derivatives to investigate the flow and heat transfer of complex fluid on the stretching sheet with variable thickness and formulated novel governing equations subject to irregular regions.…”

Section: Introductionmentioning

confidence: 99%

Two dimensional MHD nanofluid flow analysis of fractional dual-phase-lag heat conduction between inclined cylinders with variable thickness

Jiang

Zhao

Zhang

2022

HFF

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Purpose This study aims to investigate the two-dimensional magnetohydrodynamic flow and heat transfer of a fractional Maxwell nanofluid between inclined cylinders with variable thickness. Considering the cylindrical coordinate system, the constitutive relation of the fractional viscoelastic fluid and the fractional dual-phase-lag (DPL) heat conduction model, the boundary layer governing equations are first formulated and derived. Design/methodology/approach The newly developed finite difference scheme combined with the L1 algorithm is used to numerically solve nonlinear fractional differential equations. Furthermore, the effectiveness of the algorithm is verified by a numerical example. Findings Based on numerical analysis, the effects of parameters on velocity and temperature are revealed. Specifically, the velocity decreases with the increase of the fractional derivative parameter α owing to memory characteristics. The temperature increase with the increase of fractional derivative parameter ß due to a decrease in thermal resistance. From a physical perspective, the phase lag of the heat flux vector and temperature gradients τq and τT exhibit opposite trends to the temperature. The ratio τT/τq plays an important role in controlling different heat conduction behaviors. Increasing the inclination angle θ, the types and volume fractions of nanoparticles Φ can increase velocity and temperature, respectively. Originality/value Fractional Maxwell nanofluid flows from a fixed-thickness pipe to an inclined variable-thickness pipe, and the fractional DPL heat conduction model based on materials is considered, which provides a basis for the safe and efficient transportation of high-viscosity and condensable fluids in industrial production.

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Two-phase nanofluid over rotating disk with exponential variable thickness

Cited by 6 publications

References 35 publications

Regression analysis of horizontal magnetic field in thermophysical convective flow of nanofluid

Regression analysis of horizontal magnetic field in thermophysical convective flow of nanofluid

Entropy generation in water conveying nanoparticles flow over a vertically moving rotating surface: Keller box analysis

Two dimensional MHD nanofluid flow analysis of fractional dual-phase-lag heat conduction between inclined cylinders with variable thickness

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