Unsteady mixed convective stagnation point flow of hybrid nanofluid in porous medium

Wahid, Nur Syahirah; Arifin, Norihan Md; Khashi’ie, Najiyah Safwa; Pop, Ioan; Bachok, Norfifah; Hafidzuddin, Mohd Ezad Hafidz

doi:10.1007/s00521-022-07323-0

Cited by 7 publications

(3 citation statements)

References 77 publications

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“…Initial approximations for the solutions are essential to be supplied in order to generate the possible solutions, thus, several trial-and-error processes are performed. For the present study, the validity of the findings was established by comparing them with the data that had been previously published by: Khashi'ie et al [59], Wahid et al [60], Ishak et al [61], Roşca et al [62], and Ramachandran et al [63]. In this regard, Tables 3-6 validate the values for certain limiting cases, and the comparison proves an excellent level of agreement between them.…”

Section: Resultssupporting

confidence: 75%

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

et al. 2022

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The widespread application of hybrid nanofluid in real applications has been accompanied by a large increase in computational and experimental research. Due to the unique characteristics of hybrid nanofluid, this study aspires to examine the steady two-dimensional mixed convection stagnation point flow of a hybrid nanofluid past a vertical plate with radiation, Dufour, and Soret effects, numerically. The formulations of the specific flow model are presented in this study. The model of fluid flow that is expressed in the form of partial differential equations is simplified into ordinary differential equations via the transformation of similarity, and then solved numerically by using the boundary value problem solver known as bvp4c in MATLAB, which implements the finite difference scheme with the Lobatto IIIa formula. Two possible numerical solutions can be executed, but only the first solution is stable and meaningful from a physical perspective when being evaluated via a stability analysis. According to the findings, it is sufficient to prevent the boundary layer separation by using 2% copper nanoparticles and considering the lesser amount of Dufour and Soret effects. The heat transfer rate was effectively upgraded by minimizing the volume fraction of copper and diminishing the Dufour effect. Stronger mixed convection would lead to maximum skin friction, mass transfer, and heat transfer rates. This important preliminary research will give engineers and scientists the insight to properly control the flow of fluids in optimizing the related complicated systems.

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Section: Resultssupporting

confidence: 75%

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

et al. 2022

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“…Their analysis showed that the permeability of the HFF 34,5 medium controlled mixed convection. Wahid et al (2022) showed that the inclusion of copper nanoparticles in mixed delayed the transition in flow. Khan (2019) numerically investigated by the homotopy analysis method the mixed convection of non-Newtonian nanofluid in a porous medium containing gyrotatic microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Linear stability analysis of MHD mixed convection flow of a radiating nanofluid in porous channel in presence of viscous dissipation

Njingang Ketchate,

Makinde,

Tiam Kapen

et al. 2024

HFF

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Purpose This paper aims to investigate the hydrodynamic instability properties of a mixed convection flow of nanofluid in a porous channel. Design/methodology/approach The treated single-phase nanofluid is a suspension consisting of water as the working fluid and alumina as a nanoparticle. The anisotropy of the porous medium and the effects of the inclination of the magnetic field are highlighted. The effects of viscous dissipation and thermal radiation are incorporated into the energy equation. The eigenvalue equation system resulting from the stability analysis is processed numerically by the spectral collocation method. Findings Analysis of the results in terms of growth rate reveals that increasing the volume fraction of nanoparticles increases the critical Reynolds number. Parameters such as the mechanical anisotropy parameter and Richardson number have a destabilizing effect. The Hartmann number, permeability parameter, magnetic field inclination, Prandtl number, wave number and thermal radiation parameter showed a stabilizing effect. The Eckert number has a negligible effect on the growth rate of the disturbances. Originality/value Linear stability analysis of Magnetohydrodynamics (MHD) mixed convection flow of a radiating nanofluid in porous channel in presence of viscous dissipation.

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“…This result was obtained from the study of the buoyancy effect on the stagnation-point flow of a hybrid nanofluid toward a vertical plate in a saturated porous medium. A research paper by Wahid et al [19] studied the unsteady mixed convective stagnation-point flow of hybrid nanofluid in a porous medium, they discovered that the higher value of the first and second resistant parameters due to porous media concludes that these parameters aid in improving the heat transfer and skin friction rates. This investigation has proven the hybrid nanofluid's ability to reinforce heat transfer with the embedment of a porous medium.…”

Section: Introductionmentioning

confidence: 99%

Stagnation-point flow and heat transfer over an exponentially shrinking/stretching sheet in porous medium with heat generation

Hakim,

Rosali,

Johari

2023

Math. Model. Comput.

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This study seeks to examine the fluid flow at the stagnation point over an exponentially shrinking and stretching sheet in a porous medium. This study also investigates the heat transfer rate in the presence of heat generation. By using the appropriate similarity transformation, we obtained ordinary differential equations (ODEs) that are reduced from the governing system of partial differential equations (PDEs). These resulting equations are subjected to new boundary conditions and solved numerically by using BVP4C in MATLAB software. The effects of the parameters involved in this study are summarized and thoroughly discussed: the skin friction coefficient, local Nusselt number, velocity profile, and temperature profile obtained. The analysis is done by using graphical and tabular data. The observed parameters are the permeability parameter K and the heat generation parameter Q towards shrinking/stretching parameter λ. It is found that a dual solution exists for λ<0 (shrinking case), whereas the solution is unique for λ>0 (stretching case). The analysis reveals that with heat generation being increased, the skin friction coefficient is constant. However, it increases when permeability increases. The local Nusselt number decreases with heat generation being increased. However, it increases when the permeability increases.

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Unsteady mixed convective stagnation point flow of hybrid nanofluid in porous medium

Cited by 7 publications

References 77 publications

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

Linear stability analysis of MHD mixed convection flow of a radiating nanofluid in porous channel in presence of viscous dissipation

Stagnation-point flow and heat transfer over an exponentially shrinking/stretching sheet in porous medium with heat generation

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