Numerical analysis of the onset of longitudinal convective rolls in a porous medium saturated by an electrically conducting nanofluid in the presence of an external magnetic field

Wakif, Abderrahim; Boulahia, Zoubair; Sehaqui, Rachid

doi:10.1016/j.rinp.2017.06.003

Cited by 75 publications

(25 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In future, one may explore to generalized Buongiorno model considering the effects of viscous and magnetic dissipation with Corciones experimental correlations for the effective viscosity and thermal conductivity of squeezing nanofluid flows (see) by employing an improved numerical paradigm, such as generalized differential quadrature method (see), collocation based spectral quasi linearization method (see) for the superior numerical treatment of the current fluidic model.…”

Section: Resultsmentioning

confidence: 99%

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Thumma¹,

Magagula

2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

This article addresses transient electromagnetohydrodynamic radiative squeezing flow due to convectively heated electromagnetic actuator. The transport analysis of heat and mass is explored considering the heat generation/ absorption and destructive species homogeneous reaction. Suitable transformations are applied on the mathematical model developed to convert governing partial differential equations to ordinary differential equations (ODEs). Spectral local linearization method (SLLM) is employed on the resultant nonlinear coupled ODEs to compute the numerical results. Influence of sundry physical quantities on heat mass transfer of squeezing flow characteristics are determined using graphs and tabular results. SLLM results exhibit that momentum and temperature improved with rise in squeezing and heat source parameters correspondingly. Momentum enhances at lower plate and detracts with rise in modified Hartmann number. For improved heat source parameter, the rate of heat transfer diminishes and is more significant for higher Prandtl number values.This investigation has relevance in disk style magnetic clutches, rolling elements, food processing, bearings, squeezing film pressure sensors, and flow rheostats. K E Y W O R D S convective conditions, electromagnetohydrodynamic, heat source/ sink, riga plate, SLLM, squeezing flow

show abstract

Section: Resultsmentioning

confidence: 99%

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Thumma¹,

Magagula

2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

show abstract

“…Qasim et al (2018) conducted an innovative numerical simulation of MHD peristaltic flow with variable electrical conductivity and joule dissipation by utilizing Generalized Differential Quadrature Method (GDQM). On the other hand, a comprehensive survey was done by Wakif et al (2017a) on the thermo-magneto-hydrodynamic stability of nanofluids saturating porous mediums by means of Chebyshev-Gauss-Lobatto Spectral Method (CGLSM). Similarly, Rana et al (2017) studied the onset of thermomagneto-hydrodynamic instability in a rotating viscoelastic nanofluid layer under the influence of an internal heat source with the help of Galerkin Weighted Residuals Technique (GWRT).…”

Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Magneto-Convection of Alumina - Water Nanofluid Within Thin Horizontal Layers Using the Revised Generalized Buongiorno's Model

Wakif¹,

Boulahia²,

Amine³

et al. 2018

Frontiers in Heat and Mass Transfer

View full text Add to dashboard Cite

The significance of an externally applied magnetic field and an imposed negative temperature gradient on the onset of natural convection in a thin horizontal layer of alumina-water nanofluid for various sizes of spherical alumina nanoparticles (e.g., 30 , 35 , 40 , 45) and volumetric fractions (e.g., 0.01, 0.02, 0.03, 0.04) is explored and analyzed numerically in this paper. The generalized Buongiorno's mathematical model with the simplified Maxwell's equations and the Oberbeck-Boussinesq approximation were adopted to simulate the two-phase transport phenomena, in which the Brownian motion and thermophoresis aspects are taken into account. Moreover, the rheological behavior of alumina-water nanofluid and related flow are assumed to be Newtonian, incompressible and laminar. Based on the linear stability theory, the perturbed partial differential equations (PDEs) of magnetohydrodynamic convective nanofluid flow are firstly simplified formally using the normal mode analysis technique and secondly converted to a generalized eigenvalue problem considering more realistic boundary conditions, in which the thermal Rayleigh number is the associated eigenvalue. Additionally, the resulting eigenvalue problem was solved numerically using powerful collocation methods, like Chebyshev-Gauss-Lobatto Spectral Method (CGLSM) and Generalized Differential Quadrature Method (GDQM). Furthermore, the thermo-magneto-hydrodynamic stability of the nanofluidic system and the critical size of convection cells are highlighted graphically in terms of the critical thermal Rayleigh and wave numbers, for various values of the magnetic Chandrasekhar number, the volumetric fraction and the diameter of alumina nanoparticles.

show abstract

“…Hsiao [4] studied the radiative EMHD Carreau nano uid with activation energy. Wakif et al [5] reported the numerical analysis of the longitudinal convective rolls in a porous medium. The study was conducted in the presence of the magnetic eld, and the medium was lled with nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal radiation on MHD micropolar Carreau nanofluid with viscous dissipation, Joule heating and internal heating

2019

View full text Add to dashboard Cite

The aim of the present study is to analyze the magnetohydrodynamic micropolar Carreau nano uid ow past a stretching sheet. Viscous dissipation, internal heating, Joule heating, and linear thermal radiation e ects are also incorporated into the energy equation. The system of governing PDEs is transformed into the ODEs by invoking the similarity transformation. The shooting method is implemented to solve the system of ODEs. The in uence of pertinent parameters on ow distributions is analyzed graphically and discussed in detail. The uid motion upsurges for the larger values of the Weissenberg number and the material parameter, while the reverse situation is studied in the thermal and concentration pro les.

show abstract

Numerical analysis of the onset of longitudinal convective rolls in a porous medium saturated by an electrically conducting nanofluid in the presence of an external magnetic field

Cited by 75 publications

References 21 publications

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Magneto-Convection of Alumina - Water Nanofluid Within Thin Horizontal Layers Using the Revised Generalized Buongiorno's Model

Effect of thermal radiation on MHD micropolar Carreau nanofluid with viscous dissipation, Joule heating and internal heating

Contact Info

Product

Resources

About