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, the effects of magnetic field on flow and heat transfer during a two-dimensional convection melting of solid gallium in a rectangular cavity are investigated. And the results show that the magnetic field with an inclination angle has a significant impact on the flow transfer in the melting process.
Abstract: A numerical study is presented for two-dimensional convection melting of solid gallium in a rectangular cavity. The bottom wall of the cavity is uniformly heated and a uniform magnetic field is applied separately in both horizontal and vertical directions. The lattice Boltzmann (LB) method considering the magnetic field force is employed to solve the governing equations. The effects of magnetic field on flow and heat transfer during melting are presented and discussed at Rayleigh number Ra = 1 × 105 and Hartmann number Ha = 0, 15, and 30. The results show that the magnetic field with an inclination angle has a significant impact on the flow and heat transfer in the melting process. For a small Hartmann number, similar melting characteristics are observed for both horizontally applied and vertically applied magnetic fields. For a high value of Hartmann number, it is found that in the earlier stage of melting process, the flow retardation effect caused by the horizontally applied magnetic field is l...
29 citations
TL;DR: It is proved that augmenting the porousness factor can increase the Nusselt number, but converse performance is conveyed for Lorentz forces.
Abstract: This research paper deals with the study of hybrid nanofluid flow with free convection in a permeable media using CVFEM. Hybrid nanoparticle (Fe3O4 + MWCNT) with base fluid H2O has been assumed. The magnetic effect is applied on hybrid nanofluid. In addition, the Non-Darcy model is used and the source term of radiation influence has designated for innumerable forms of nanofluids. Flow design was described for wide range of examined parameters. It proved that augmenting the porousness factor can increase the Nusselt number, but converse performance is conveyed for Lorentz forces. The convective nanomaterials flow intensity enhances with increase of penetrability and stronger thermal effect. Augmented magnetic field produces feebler convective flow and inferior temperature gradient. As temperature of heat source reduces with rise of Hartmann number, Nuave decreases and greater exergy loss occurs.
29 citations
TL;DR: In this article, the peristaltic transport of a MHD dusty three-dimensional biorheological (Casson) fluid in a duct is investigated, where the governing flow problem is based on the continuity and momentum equations, and the exact solution has been obtained for the resulting partial differential equation by means of the eigenfunction expansion method.
29 citations
TL;DR: In this article, mixed convection of a fluid in the fully developed region in a horizontal concentric cylindrical annulus with different uniform wall temperatures, is numerically investigated in both steady and unsteady states in the presence of radial MHD force, as well as in consideration of heat generation due to viscous dissipation.
29 citations
TL;DR: In this paper, the steady two-dimensional oblique stagnation point flow of an electrically conducting micropolar fluid in the presence of a uniform external electromagnetic field (E0, H0) is analyzed and some physical situations are examined.
29 citations