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 article, the authors investigated the effect of magneto-hydrodynamic (MHD) on entropy and heat transfer in a square inclined cavity and found that the contribution of heat transfer entropy generation into the total entropy generation rate is determined using the Bejan number.
63 citations
TL;DR: In this article, numerical analysis using finite difference approach with line method is performed on the laminar magneto-hydrodynamic natural convection in a square enclosure filled with a porous medium to investigate the effects of viscous dissipation and radiation.
62 citations
TL;DR: In this article, the effects of Nusselt number, Hartmann number arising from MHD, buoyancy ratio number and Lewis number on the flow and heat transfer characteristics of nanofluid in the presence of variable magnetic field were investigated.
Abstract: In this paper, heat and mass transfer of nanofluid in presence of variable magnetic field is investigated. The effects of Brownian motion and thermophoresis are taken into account. Control Volume-based Finite Element Method is applied to solve the governing equations in which both effect of ferrohydrodynamic and magnetohydrodynamic are considered. The effects of Rayleigh number, Hartmann number arising from MHD, buoyancy ratio number and Lewis number on the flow and heat transfer characteristics have been examined. Results are presented in the form of streamline, isotherm, isoconcentration and heatline plots. Results show that Nusselt number has direct relationship with Rayleigh number, buoyancy ratio number and Lewis number while it has reverse relationship with Hartmann number.
62 citations
TL;DR: In this paper, the authors presented the two-dimensional flow of MHD hyperbolic tangent fluid with nanoparticles towards a stretching surface, where the mathematical modelling of current flow analysis yields the nonlinear set of partial differential equations which then are reduce to ordinary differential equations by using suitable scaling transforms.
Abstract: This article presents the two-dimensional flow of MHD hyperbolic tangent fluid with nanoparticles towards a stretching surface. The mathematical modelling of current flow analysis yields the nonlinear set of partial differential equations which then are reduce to ordinary differential equations by using suitable scaling transforms. Then resulting equations are solved by using shooting technique. The behaviour of the involved physical parameters (Weissenberg number We , Hartmann number M , Prandtl number Pr , Brownian motion parameter Nb , Lewis number Le and thermophoresis number Nt ) on velocity, temperature and concentration are interpreted in detail. Additionally, local skin friction, local Nusselt number and local Sherwood number are computed and analyzed. It has been explored that Weissenberg number and Hartmann number are decelerate fluid motion. Brownian motion and thermophoresis both enhance the fluid temperature. Local Sherwood number is increasing function whereas Nusselt number is reducing function for increasing values of Brownian motion parameter Nb , Prandtl number Pr , thermophoresis parameter Nt and Lewis number Le . Additionally, computed results are compared with existing literature to validate the accuracy of solution, one can see that present results have quite resemblance with reported data.
62 citations
TL;DR: In this article, the authors examined the natural convection in a square enclosure filled with a water-Al2O3 nanofluid in the presence of magnetic field and uniform heat generation/absorption.
62 citations