MHD stagnation point flow of viscoelastic nanofluid with non-linear radiation effects

Abstract. Our attention here in this research is on scrutinizing the nonlinear convection characteristics in a flow induced by a slendering surface. Flow expression is developed through electrically conducting Williamson nanomaterial. Nonlinear forms of stretching and free stream velocities are imposed. Consideration of nonlinear thermal radiation, non-uniform heat generation/absorption, Joule and convective heating aspects describe the phenomenon of heat transfer. The zero-mass condition for concentration is also considered. The compatible transformations produce strong nonlinear differential systems. The problems are computed analytically utilizing the bvp4c procedure. Heat transfer rate and drag force are also explained for various physical variables. Our analysis reveals that the heat transfer rate augments via larger radiation parameter and Biot number. Moreover, larger Brownian motion and thermophoresis parameters have opposite characteristics on concentration field. For the verification of the present findings, the results of the presented analysis have been compared with the available works in particular situations and reasonable agreement is noted.

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“…A number of articles on magneto nanofluids are available in the literature and some are given in refs. [16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear thermal radiation in flow induced by a slendering surface accounting thermophoresis and Brownian diffusion

et al. 2017

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“…Impact of non-linear thermal radiation in MHD stagnation point flow of viscoelastic nanofluid is reported by Farooq et al [28]. Recently, Salahuddin et al [27] examined the squeezed flow of MHD Carreau-Yasuda fluid past a sensor surface. They found that an enhancement in the Weissenberg number diminishes the velocity profiles and boundary layer thickness.…”

Section: Introductionmentioning

confidence: 95%

Unsteady heat and mass transfer mechanisms in MHD Carreau nanofluid flow

Khan

Azam

2017

Journal of Molecular Liquids

135

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“…Also, Brownian motion (Nb) and thermophoresis (Nt) cause the enhancement of thermal boundary layer thickness and reduction of Nusselt number. Farooq et al by using homotopy method studied the two‐dimensional flow of viscoelastic nanofluid with the effects of magnetic field and nonlinear radiation on an extended plate. He concluded that by increasing Brownian motion (Nb) the concentration of nanoparticles reduces and by increasing thermofrost parameter (Nt) the thickness of thermal and concentration boundary layer enhances and heat transfer rate reduces.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of turbulent natural convection of nanofluid with thermal radiation inside a tall enclosure under the influence of magnetohydrodynamic

Rahmati

Sepehrnia

Motamedian

2018

Heat Trans. Asian Res.

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In the present study, the natural convective heat transfer in the turbulent flow of water/CuO nanofluid with volumetric radiation and magnetic field inside a tall enclosure has been numerically investigated. The thermophysical properties of nanofluid have been considered variable with temperature and the effects of Brownian motion of nanoparticles have been considered. The main objective of this work is an investigation of the effect of using water/CuO nanofluid and presence of magnetic field on turbulent natural convection in three types of enclosures (vertical, inclined, and horizontal) by considering the volumetric radiation. The governing equations on turbulent flow domain under the influence of the magnetic field and by considering the combination of volumetric radiation and natural convection have been solved by a coupled algorithm. For validating the present research, a comparison has been carried out with the laminar natural convection flow under the influence of the magnetic field and radiation effects and also, the natural turbulent convection flow of previous studies and a proper coincidence has been achieved. The results indicated that by increasing volume fraction and Hartmann number the average Nusselt number enhances and reduces, respectively. By adding 1% CuO nanoparticles to the base fluid, heat transfer improves from 10.59% to 17.05%. However, by increasing the volume fraction from 1% to 4%, heat transfer improves from 1.35% to 4.90%. By increasing Hartmann number from 0 to 600, heat transfer reduces from 9.29% to 22.07%. Also, the results show that the ratio of deviation angle of the enclosure to the horizontal surface has considerable effects on heat transfer performance. Therefore, in similar conditions, the inclined enclosure with a deviation angle of 45° compared to the vertical and horizontal enclosure has better thermal performance.

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MHD stagnation point flow of viscoelastic nanofluid with non-linear radiation effects

Cited by 297 publications

References 54 publications

Nonlinear thermal radiation in flow induced by a slendering surface accounting thermophoresis and Brownian diffusion

Nonlinear thermal radiation in flow induced by a slendering surface accounting thermophoresis and Brownian diffusion

Unsteady heat and mass transfer mechanisms in MHD Carreau nanofluid flow

Numerical simulation of turbulent natural convection of nanofluid with thermal radiation inside a tall enclosure under the influence of magnetohydrodynamic

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