Stagnation-point flow of an aqueous titania-copper hybrid nanofluid toward a wavy cylinder

Yousefi, Mohammad; Dinarvand, Saeed; Yazdi, Mohammad Eftekhari; Pop, Ioan

doi:10.1108/hff-01-2018-0009

Cited by 147 publications

(91 citation statements)

References 55 publications

(67 reference statements)

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“…In the present model, 0.1 volume fraction of silica (ϕ 1 ) is included to the host liquid (H 2 O) and accordingly molybdenum disulphide (ϕ 2 ) is introduced with numerous concentrations to obtain MoS 2 -SiO 2 /water hybrid nanosuspension. By considering the different combination of nanoparticles, the similar approach has been investigated by many researchers [46,49,50]. The surface roughness is modeled in terms of large frequency and low amplitude sinusoidal waves.…”

Section: Resultsmentioning

confidence: 99%

Mixed Convection of Silica–Molybdenum Disulphide/Water Hybrid Nanoliquid over a Rough Sphere

2021

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A steady combined convective motion over a rough sphere with hybrid nanoparticles is analyzed. We have considered silica (SiO2) and molybdenum disulphide (MoS2) nanoadditives which are added in H2O to form MoS2–SiO2/H2O hybrid nanoliquid. The partial differential equations describing the boundary layer flow characteristics are reduced into non-dimensional form with appropriate non-similar reduction. It should be noted that the governing equations have been written using the conservation laws of mass, momentum and energy. These considered equations allow simulating the analyzed phenomenon using numerical techniques. Implicit finite difference approximation and technique of Quasilinearization are utilized to work out the dimensionless control equations. The influence of various physical characteristics included in this challenge, such as the velocity fields and temperature patterns, is investigated. The study of border gradients is performed, which deals with the skin friction and energy transport strength. The plots of computational outcomes are considered, which ascertain that velocity distribution reduces, whilst coefficient of friction at the surface, energy transport strength and temperature distribution augment for enhancing values of hybrid nanofluid. For enhancing magnitude of combined convection parameter, dimensionless velocity distribution, surface drag coefficient and energy transport strength enhance, while temperature distribution diminishes. High impact of hybrid nanofluid on energy transport strength and the surface friction compared to the host liquid and mono nanofluid in presence/absence of surface roughness is shown. Velocity distribution enhances for rising values of velocity ratio parameter. Enhancing values of frequency parameter rise the friction at the surface and energy transport strength. It is also examined that the hybrid nanofluid has a maximum temperature for the blade-shaped nanoparticles and has a low temperature for the spherical-shaped nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Mixed Convection of Silica–Molybdenum Disulphide/Water Hybrid Nanoliquid over a Rough Sphere

2021

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“…[24–33] examined the hybrid nanofluid flow's dual solutions. Similar problems were continuously studied by several researchers [34–43] with various physical conditions. Additionally, nanofluid [44–46] and hybrid nanofluid [47–52] review papers can be found in the literature for further reading.…”

Section: Introductionmentioning

confidence: 97%

Unsteady hybrid nanofluid flow on a stagnation point of a permeable rigid surface

2020

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This study investigates the unsteady flow of Al2O3‐Cu/water hybrid nanofluid on a stagnation point of a permeable rigid surface. The similarity equations are obtained using similarity variables and then solved using the bvp4c solver. The outcomes show that dual solutions exist for the negative unsteadiness and some mass flux parameters. Besides, the heat transfer rate is intensified with the hybrid nanoparticles. Moreover, the increasing of the mass flux parameter tends to increase the heat transfer rate and the skin friction on the surface. Also, the reduction of the skin friction coefficient is observed, and a higher heat transfer rate is achieved for smaller values of the unsteadiness parameter. Finally, by a temporal stability analysis, it is found that the first solution is stable and reliable as time evolves.

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“…Hayat et al 14 inspected the rotating flow problem of hybrid nanofluids. The aqueous Titania-copper hybrid nanofluid stagnation point flow towards the stretching tube was explored by Yousefi et al 15 . Subhani and Nadeem 16 studied the behavior of (hybrid nanofluid) over the stretching surface.…”

Section: Introductionmentioning

confidence: 99%

Mixed convection stagnation point flow of the blood based hybrid nanofluid around a rotating sphere

Gul

Ali

Alghamdi

et al. 2021

Sci Rep

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In this new world of fluid technologies, hybrid nanofluid has become a productive subject of research among scientists for its potential thermal features and abilities, which provides an excellent result as compared to nanofluids in growing the rate of heat transport. Our purpose here is to introduce the substantial influences of magnetic field on 2D, time-dependent and stagnation point inviscid flow of couple stress hybrid nanofluid around a rotating sphere with base fluid is pure blood, $${\text{TiO}}_{2} \,\,{\text{and}}\,\,{\text{Ag}}$$ TiO 2 and Ag as the nanoparticles. To translate the governing system of partial differential equations and the boundary conditions relevant for computation, some suitable transformations are implemented. To obtain the analytical estimations for the corresponding system of differential expression, the innovative Optimal Homotopy Analysis Method is used. The characteristics of hybrid nanofluid flow patterns, including temperature, velocity and concentration profiles are simulated and analyzed in detail due to the variation in the evolving variables. Detailed research is also performed to investigate the influences of relevant constraints on the rates, momentum and heat transport for both $${\text{TiO}}_{2} + {\text{Ag}} + Blood$$ TiO 2 + Ag + B l o o d and $${\text{TiO}}_{2} + Blood$$ TiO 2 + B l o o d . One of the many outcomes of this analysis, it is observed that increasing the magnetic factor will decelerate the hybrid nanofluid flow velocity and improve the temperature profile. It may also be demonstrated that by increasing the Brownian motion factor, significant improvement can be made in the concentration field of hybrid nanofluid. The increase in the nanoparticle volume fraction from 0.01 to 0.02 in the case of the hybrid nanofluid enhances the thermal conductivity from 5.8 to 11.947% and for the same value of the nanoparticle volume fraction in the case of nanofluid enhance the thermal conductivity from 2.576 to 5.197%.

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Stagnation-point flow of an aqueous titania-copper hybrid nanofluid toward a wavy cylinder

Cited by 147 publications

References 55 publications

Mixed Convection of Silica–Molybdenum Disulphide/Water Hybrid Nanoliquid over a Rough Sphere

Mixed Convection of Silica–Molybdenum Disulphide/Water Hybrid Nanoliquid over a Rough Sphere

Unsteady hybrid nanofluid flow on a stagnation point of a permeable rigid surface

Mixed convection stagnation point flow of the blood based hybrid nanofluid around a rotating sphere

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