Mixed Convection Boundary Layer Flow Embedded in a Thermally Stratified Porous Medium Saturated by a Nanofluid

Yasin, Mohd Hafizi Mat; Arifin, Norihan Md; Ismail, Fudziah; Pop, Ioan

doi:10.1155/2013/121943

Cited by 23 publications

(12 citation statements)

References 39 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%

“…Ibrahim and Makinde [45] analyzed the natural convection and stable doubly stratified flow with the presence of nanoparticles. Mat Yasin et al [46] dealt with the mixed convective flow in a thermally stratified porous medium saturated by a nanofluid using Tiwari and Das model. The impact of double stratification and mixed convective flow of the non-Newtonian fluids with the appearance of nanoparticles have been studied by Hussain et al [47] and Abbasi et al [48] using Maxwell and Jeffrey nanofluid models.…”

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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“…Ibrahim and Makinde [28] considered the natural convection of a thermally and solutally stratified viscous flow with the presence of nanoparticles. Mat Yasin et al [29] applied Tiwari and Das model to solve the mixed convection flow of a thermally stratified nanofluid in a porous medium. The coupled effects of mixed convection and double stratifications for Maxwell and Jeffrey nanofluid models were examined by Hussain et al [30] and Abbasi et al [31], respectively.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamics (MHD) Flow and Heat Transfer of a Doubly Stratified Nanofluid Using Cattaneo-Christov Model

Khashi’ie¹,

Arifin²,

Hafidzuddin³

et al. 2019

ujme

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The present study utilized Cattaneo-Christov heat flux model for solving nanofluid flow and heat transfer towards a vertical stretching sheet with the presence of magnetic field and double stratification. Thermal and solutal buoyancy forces are also examined to deal with the double stratification effects. Buongiorno's model of nanofluid is used to incorporate the effects of Brownian motion and thermophoresis. The boundary layer with non-Fourier energy equations are reduced into a system of nonlinear ordinary (similarity) differential equations using suitable transformations and then numerically solved using bvp4c solver in MATLAB software. The local Nusselt and Sherwood numbers of few limited cases are tabulated and compared with the earlier published works. It showed that a positive agreement was found with the previous study and thus, validated the present method. Numerical solutions are graphically demonstrated for several parameters namely magnetic, thermal relaxation, stratifications (thermal and solutal), thermophoresis and Brownian motion on the velocity, temperature and nanoparticles volume fraction profiles. An upsurge of the heat transfer rate was observed with the imposition of the thermal relaxation parameter (Cattaneo-Christov model) whereas the accretion of thermal and solutal stratification parameters reduced the temperature and nanoparticles concentration profiles, respectively.

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“…Permeable media by giving high surface territory contact will enhance heat transmit speed in channels. Regular convection of periphery layer of a permeable medium nano flows issues were made by ( [3] & [4]). Over a decades ago, various works have detailed [5] on the thermal conductivity of nano flows than that of customary heat transmit liquids with the reason of arbitrary movement of nano particles.…”

Section: Introductionmentioning

confidence: 99%

Chemical Reaction Effect on Magnetite Nano Fluid through Permeable Surface

Vedavathi¹,

DHARMAIAH²,

BALAMURUGAN³

et al. 2019

IJITEE

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The transient MHD stream of a Fe3O4 water based nano flow fluid past moving vertical holey semi-infinite holey surface and convective in the company of chemical reaction, thermophoresis and consistent heat basis in a turning casing of orientation is examined. The platter is considered to waver in moment with steady recurrence. The impacts of parameters entering into the problem inside the periphery layer for the stream, temperature and concentration are analyzed for magnetite water based nanofluid through diagrams.

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Mixed Convection Boundary Layer Flow Embedded in a Thermally Stratified Porous Medium Saturated by a Nanofluid

Cited by 23 publications

References 39 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

Magnetohydrodynamics (MHD) Flow and Heat Transfer of a Doubly Stratified Nanofluid Using Cattaneo-Christov Model

Chemical Reaction Effect on Magnetite Nano Fluid through Permeable Surface

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