Thermal and solutal stratification on MHD nanofluid flow over a porous vertical plate

Kandasamy, R.; Dharmalingam, R.; Prabhu, K. K. Sivagnana

doi:10.1016/j.aej.2016.02.029

Cited by 42 publications

(16 citation statements)

References 35 publications

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“…From the engineering perspective, many applications utilize the concept of double stratification, such as heat rejection from environment, thermal energy storage systems and solar energy because the better stratification corresponds to the higher energy performance. There are a few studies focused on mathematical analysis for the convective flow of nanofluids with the presence of stratification [45][46][47][48][49][50][51][52][53]. Ibrahim and Makinde [45] analyzed the natural convection and stable doubly stratified flow with the presence of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…Daniel et al [50,51] considered the effects of viscous dissipation and Joule heating on both steady and unsteady MHD mixed convection of doubly stratified nanofluid. Kandasamy et al [52] investigated the effect of double stratification on MHD nanofluid over a porous vertical plate. The previously published results showed that the temperature and concentration distribution are decreased with the intensity of thermal and solutal stratification, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Dual Stratified Nanofluid Flow Past a Permeable Shrinking/Stretching Sheet Using a Non-Fourier Energy Model

et al. 2019

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The present study emphasizes the combined effects of double stratification and buoyancy forces on nanofluid flow past a shrinking/stretching surface. A permeable sheet is used to give way for possible wall fluid suction while the magnetic field is imposed normal to the sheet. The governing boundary layer with non-Fourier energy equations (partial differential equations (PDEs)) are converted into a set of nonlinear ordinary differential equations (ODEs) using similarity transformations. The approximate relative error between present results (using the boundary value problem with fourth order accuracy (bvp4c) function) and previous studies in few limiting cases is sufficiently small (0% to 0.3694%). Numerical solutions are graphically displayed for several physical parameters namely suction, magnetic, thermal relaxation, thermal and solutal stratifications on the velocity, temperature and nanoparticles volume fraction profiles. The non-Fourier energy equation gives a different estimation of heat and mass transfer rates as compared to the classical energy equation. The heat transfer rate approximately elevates 5.83% to 12.13% when the thermal relaxation parameter is added for both shrinking and stretching cases. Adversely, the mass transfer rate declines within the range of 1.02% to 2.42%. It is also evident in the present work that the augmentation of suitable wall mass suction will generate dual solutions. The existence of two solutions (first and second) are noticed in all the profiles as well as the local skin friction, Nusselt number and Sherwood number graphs within the considerable range of parameters. The implementation of stability analysis asserts that the first solution is the real solution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual Stratified Nanofluid Flow Past a Permeable Shrinking/Stretching Sheet Using a Non-Fourier Energy Model

et al. 2019

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“…The nanofluid model considered was the idea of Buongiorno that adapted the Brownian motion and thermophoresis diffusion parameters. Several attempts concerning this fluid model may also be found from the works [7][8][9] and many investigations in that.…”

Section: Introductionmentioning

confidence: 99%

Suspended nanoparticles on mixed convection flow of a Jeffrey fluid due to a horizontal circular cylinder with viscous dissipation

et al. 2020

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The non-Newtonian Jeffrey fluid model describes the viscoelastic property that elucidates the dual components of relaxation and retardation times. Nonetheless, there has been considerable attention on its unsatisfactory thermal performance. The model of nanofluid is contemporarily in the limelight due to its superior thermal performance compared to the conventional fluid. The proposed study herein aims to examine the Jeffrey nanofluid model over a horizontal circular cylinder with mixed convection flow. The flow analysis is performed based on the Buongiorno model with the integration of Brownian motion and thermophoresis diffusion parameters. The influence of frictional heat is also accounted. The nondimensional and non-similarity transformation variables are utilized to reduce the dimensional governing equations into three non-dimensional partial differential equations (PDEs). Subsequently, the obtained PDEs are tackled numerically through the Keller-box method. Certain continent parameters are investigated with regards to the identified distributions. A comparative study is executed based on previous studies, which indicates good agreement with results of the current study. The findings specify that the transition of boundary layer from laminar to turbulent flows happens for dissimilar values of mixed convection parameter, Deborah number, Brownian motion and Eckert number. In particular, the boundary layer separates from cylinder for positive (heated cylinder) and negative (cooled cylinder) values of mixed convection parameter. Heating the cylinder defers the separation of boundary layer, while cooling the cylinder carries the separation point close to the lower stagnation point.

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“…He concluded that with an increase in the magnetic number, the velocity of the fluid is decreased. Kandasamy et al 35 studied the effect of MHD on the nanofluid past over a vertical sheet. They concluded that the temperaturepute as well as the concentration profile decreases with a rise in the thermal and solutal stratification.…”

Section: Introductionmentioning

confidence: 99%

Numerical study focusing on the entropy analysis of MHD squeezing flow of a nanofluid model using Cattaneo–Christov theory

2018

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The present study gives an account of the heat transfer characteristics of the squeezing flow of a nanofluid between two flat plates with upper plate moving vertically and the lower in the horizontal direction. Tiwari and Das nanofluid model has been utilized to give a comparative analysis of the heat transfer in the Cu-water and Al 2 O 3 -water nanofluids with entropy generation. The modeling is carried out with the consideration of Lorentz forces to observe the effect of magnetic field on the flow. The Joule heating effect is included to discuss the heat dissipation in the fluid and its effect on the entropy of the system. The nondimensional ordinary differential equations are solved using the Keller box method to assess the numerical results which are presented by the graphs and tables. An interesting observation is that the entropy is generated more near the lower plate as compared with that at the upper plate. Also, the heat transfer rate is found to be higher for the

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Thermal and solutal stratification on MHD nanofluid flow over a porous vertical plate

Cited by 42 publications

References 35 publications

Dual Stratified Nanofluid Flow Past a Permeable Shrinking/Stretching Sheet Using a Non-Fourier Energy Model

Dual Stratified Nanofluid Flow Past a Permeable Shrinking/Stretching Sheet Using a Non-Fourier Energy Model

Suspended nanoparticles on mixed convection flow of a Jeffrey fluid due to a horizontal circular cylinder with viscous dissipation

Numerical study focusing on the entropy analysis of MHD squeezing flow of a nanofluid model using Cattaneo–Christov theory

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