Heat Source/Sink Effects on a Hybrid Nanofluid-Filled Porous Cavity

Gorla, Rama Subba Reddy; Siddiqa, Sadia; Mansour, M. A.; Rashad, A. M.; Salah, T.

doi:10.2514/1.t5085

Cited by 93 publications

(39 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here u and v are the velocity components of the hybrid nanofluid along he x-and y-axes, m hnf is the dynamic viscosity of the hybrid nanofluid, r hnf is the density of the hybrid nanofluid, k hnf is the thermal conductivity of the hybrid nanofluid, (r C p ) hnf is the heat capacity of the hybrid nanofluid, s hnf is the electrical conductivity of the hybrid nanofluid and U w (x) = ax, where a is a positive constant. Further, () hnf denotes the hybrid nanofluid quantities which are defined as follows (Devi and Devi, 2016b;Gorla et al, 2017):…”

Section: Mathematical Modelmentioning

confidence: 99%

MHD flow and heat transfer over a permeable stretching/shrinking sheet in a hybrid nanofluid with a convective boundary condition

Aly

Pop

2019

HFF

139

View full text Add to dashboard Cite

Purpose The purpose of this study is to present both effective analytic and numerical solutions to MHD flow and heat transfer past a permeable stretching/shrinking sheet in a hybrid nanofluid with suction/injection and convective boundary conditions. Water (base fluid) nanoparticles of alumina and copper were considered as a hybrid nanofluid. Design/methodology/approach Proper-similarity variables were applied to transform the system of partial differential equations into a system of ordinary (similarity) differential equations. Exact analytical solutions were then presented for the dimensionless stream and temperature functions. Further, the authors introduce a very nice analytic and numerical solutions for both small and large values of the magnetic parameter. Findings It was found that no/unique/two equal/dual physical solutions exist for the investigated boundary value problem. The physically realizable practice of these solutions depends on the range of the governing parameters. For a stretching/shrinking sheet, it was deduced that a hybrid nanofluid works as a cooler on increasing some of the investigated parameters. Moreover, in the case of a shrinking sheet, the first solutions of hybrid nanofluid are stable and physically realizable rather than the nanofluid, while those of the second solutions are not for both hybrid nanofluid and nanofluid. Originality/value The present results for the hybrid nanofluids are new and original, as they successfully extend (generalize) the problems previously considered by different authors for the case of nanofluids.

show abstract

Section: Mathematical Modelmentioning

confidence: 99%

MHD flow and heat transfer over a permeable stretching/shrinking sheet in a hybrid nanofluid with a convective boundary condition

Aly

Pop

2019

HFF

139

View full text Add to dashboard Cite

show abstract

“…The authors noticed that due to a rise in the convection parameter, the momentum boundary layer thickness was raised. Some other studies in the literature on the mixed convection, forced convection and free convection are given by Labib et al (2013), Wei et al (2013), Gorla et al (2017), Rostami et al (2018) and Jamaludin et al (2019).…”

mentioning

confidence: 99%

Hybrid nanofluid flow through an exponentially stretching/shrinking sheet with mixed convection and Joule heating

Yashkun

Zaimi

Ishak

et al. 2020

HFF

View full text Add to dashboard Cite

Purpose This study aims to investigate the flow and heat transfer of a hybrid nanofluid through an exponentially stretching/shrinking sheet along with mixed convection and Joule heating. The nanoparticles alumina (Al2O3) and copper (Cu) are suspended into a base fluid (water) to form a new kind of hybrid nanofluid (Al2O3-Cu/water). Also, the effects of constant mixed convection parameter and Joule heating are considered. Design/methodology/approach The governing partial differential equations are transformed into ordinary differential equations (ODEs) using appropriate similarity transformations. The transformed nonlinear ODEs are solves using the bvp4c solver available in MATLAB software. A comparison of the present results shows a good agreement with the published results. Findings Dual solutions for hybrid nanofluid flow obtained for a specific range of the stretching/shrinking parameter values. The values of the skin friction coefficient increases but the local Nusselt number decreases for the first solution with the increasing of the magnetic parameter. Enhancing copper volume fraction and Eckert number reduces the surface temperature, which intimates the decrement of heat transfer rate for the first and second solutions for the stretching/shrinking sheet. In detail, the first solution results show that when the Eckert number increases as 0.1, 0.4 and 0.7 at λ = 1.5, the temperature variations reduced to 10.686840, 10.671419 and 10.655996. While in the second solution, keeping the same parameters temperature variation reduced to 9.750777, 9.557349 and 9.364489, respectively. On the other hand, the results indicate that the skin friction coefficient increases with copper volume fraction. This study shows that the thermal boundary layer thickness rises due to the rise in the solid volume fraction. It is also observed that the magnetic parameter, copper volume fraction and Eckert number widen the range of the stretching/shrinking parameter for which the solution exists. Practical implications In practice, the investigation on the flow and heat transfer of a hybrid nanofluid past an exponentially stretching/shrinking sheet with mixed convection and Joule heating is crucial and useful. The problems related to hybrid nanofluid have numerous real-life and industrial applications, such as microelectronics, manufacturing, naval structures, nuclear system cooling, biomedical and drug reduction. Originality/value In specific, this study focuses on increasing thermal conductivity using a hybrid nanofluid mathematical model. The novelty of this study is the use of natural mixed convection and Joule heating in a hybrid nanofluid. This paper can obtain dual solutions. The authors declare that this study is new, and there is no previous published work similar to the present study.

show abstract

“…Babu et al 26 presented a review on hybrid nanoliquids. Few other momentous investigations on nanofluids have been carried out in the studies reported by References 27‐50 …”

Section: Introductionmentioning

confidence: 99%

Effects of internal heat generation and Lorentz force on unsteady hybrid nanoliquid flow and heat transfer along a moving plate with nonuniform temperature

2020

View full text Add to dashboard Cite

The aim of the study This study aims to explore the transient magnetohydrodynamics (MHD) boundary layer thermal convective flow of a hybrid nanoliquid past a moving vertical plate under the influence of internal heat generation and variable surface temperature. The research methodology The problem is modeled by coupled nonlinear partial differential equations with relevant boundary conditions. Formulated control equations are worked out using the robust implicit finite‐difference technique. The current work is validated with existing literature for special cases of the problem. The impact of important characteristics on hydrodynamic and thermal patterns, accompanied by skin friction parameter and Nusselt number, is scrutinized graphically. The major conclusion of the study Impacts of MHD, inner thermal generation, and variable surface temperature on nanoliquid circulation and energy transport are studied. It has been found that velocity, temperature, and skin friction coefficient increase with the increase in the heat generation parameter, whereas the Nusselt number reduces with such parameter. The significance of the study Obtained results can be used in different engineering devices, including heat exchangers, solar collectors, and chemical reactors.

show abstract

Heat Source/Sink Effects on a Hybrid Nanofluid-Filled Porous Cavity

Cited by 93 publications

References 38 publications

MHD flow and heat transfer over a permeable stretching/shrinking sheet in a hybrid nanofluid with a convective boundary condition

MHD flow and heat transfer over a permeable stretching/shrinking sheet in a hybrid nanofluid with a convective boundary condition

Hybrid nanofluid flow through an exponentially stretching/shrinking sheet with mixed convection and Joule heating

Effects of internal heat generation and Lorentz force on unsteady hybrid nanoliquid flow and heat transfer along a moving plate with nonuniform temperature

Contact Info

Product

Resources

About