Topic
Hartmann number
About: Hartmann number is a research topic. Over the lifetime, 2593 publications have been published within this topic receiving 61342 citations.
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TL;DR: In this paper, a conductive L-shaped obstacle is used to control flow field and a Galerkin weighted residual finite element method is used for the solution of the governing equations.
33 citations
TL;DR: In this paper, the influence of thermal radiation on MHD free convection flow of Jeffrey fluid over a vertical plate with ramped wall temperature is studied using the Laplace transform technique.
Abstract: Influence of thermal radiation on unsteady magnetohydrodynamic (MHD) free convection flow of Jeffrey fluid over a vertical plate with ramped wall temperature is studied. The Laplace transform technique is used to obtain the analytical solutions. Expressions for skin friction and Nusselt number are also obtained. Results of velocity and temperature distributions are shown graphically for embedded parameters such as Jeffrey fluid parameter , Prandtl number , Grashof number , Hartmann number , radiation parameter , and dimensionless time . It is observed that the amplitude of velocity and temperature profile for isothermal are always higher than ramped wall temperature.
33 citations
TL;DR: In this article, the effect of hybrid nanoparticles on the thermal efficiency of nano-structured nanoparticles (micropolar fluid) by using the Cattaneo-Christov heat flux model was investigated.
Abstract: Review of literature reveals that hybrid nanofluids are more effective for heat transmission as compared to the conventional fluids. Nevertheless, the knowledge of developed techniques for the enhancement of heat transmission in hybrid nanofluids has many gaps and, subsequently, an extensive study for such fluids is vital. In this article, the author investigates the effect of hybrid nanoparticles on the thermal efficiency of nano-structured nanoparticles (micropolar fluid) by using the Cattaneo-Christov heat flux model. The magnetic field is pragmatic normal to the hybrid nanofluid flow direction. In order to investigate the influence of physical parameters, the proposed model has been converted to a set of ordinary differential equations (ODEs) by means of involved variables. Furthermore, the analytical and numerical approaches are compared by using different techniques to comprehend the significance of this research. It is found that macro-velocity field reduces with micropolar factor and Hartmann number. A significant result is found in micro-velocity field for the cases when $$n = 0.5$$
and $$n = 0$$
. Also an escalating conduct in thermal field is observed against the increasing estimations of Hartmann number, micropolar parameter, Eckert number, and material parameter.
33 citations
TL;DR: In this article, the impact of different influencing parameters such as Richardson number (between 005 and 50), Hartmann number, rotational speed of the cones (between −5000 and 5000), size of the cone (between 0 and 0075H), and aspect ratio (between 04 and 2) on the flow and heat transfer in a 3D U-shaped porous channel is analyzed with finite element method.
32 citations
TL;DR: The theory of the motion of a finitely conducting, viscous liquid between long, concentric, rotating cylinders under a radial magnetic field in the case of high Hartmann number was given in this paper.
Abstract: This paper gives the theory of the motion of a finitely conducting, viscous liquid between long, concentric, rotating cylinders under a radial magnetic field in the case of high Hartmann number. Because the current and vorticity contents of a Hartmann layer are related, it is easy to predict the behaviour in both steady and unsteady states. Experiments with mercury which confirm the theory closely are described. As these were developed for an educational film on magnetohydrodynamics, they have the attraction that the results are immediately obvious to the observer.
32 citations