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 combined effect of wall electrical conductivity and direction of the magnetic field on the buoyancy-induced flow of gallium was investigated numerically, and the validation of the numerical method was achieved by comparison with both experimental and analytical data found in the literature.
24 citations
TL;DR: In this paper, the influence of magnetic forces on migration of nanomaterial through a permeable zone via an innovative method is investigated, and the results reveal that Nusselt number is in direct relation with radiation term, convective mechanism becomes stronger with improve of shape effect, and temperature gradient goes up as the Hartmann number drops or Rayleigh number augments.
Abstract: In present article, influence of magnetic forces on migration of nanomaterial through a permeable zone via an innovative method is investigated. The porous cavity packed with CuO-water nanofluid, a magneto-hydrodynamic effect is imposed, and the numerical simulation method is CVFEM. The investigations include various radiation terms, Hartmann and Rayleigh numbers and the nanomaterial shape factor and their corresponding effects on thermal properties of nanomaterial. The results reveal that Nusselt number is in direct relation with radiation term, convective mechanism becomes stronger with improve of shape effect, and temperature gradient goes up as the Hartmann number drops or Rayleigh number augments. Finally, established on derived outputs, a precise formula for Nuave as a function of the aforementioned parameters is developed.
24 citations
TL;DR: In this article , the authors examined the magneto-convection flow in the cavity problem driven by the lid using computational fluid dynamics (CFD) techniques, and the results indicated that the magnetic field orientation strongly affects the hybrid nanofluid flow and temperature distribution.
24 citations
TL;DR: In this article, the problem of transient, laminar, three-dimensional natural convection flow over an inclined permeable surface in the presence of a magnetic field and heat generation or absorption effects is considered.
24 citations
TL;DR: In this article, the second law of thermodynamics over a stretching permeable surface in the presence of the uniform vertical magnetic field in the slip nano-fluid regime was studied.
Abstract: The main purpose of the present article is to study the second law of thermodynamics over a stretching permeable surface in the presence of the uniform vertical magnetic field in the slip nano-fluid regime. In this study, four types of nanoparticles; i.e., Copper Cu, Copper oxide CuO, Aluminum oxide Al2O3, and Titanium dioxide TiO2 and also water as the base fluid are considered. Entropy generation equations, for the first time in this problem, are derived as a function of velocity and temperature gradients. Velocity profile as well as temperature distribution and averaged entropy generation are obtained using optimal homotopy analysis method (OHAM). An excellent agreement exists between the present result and the other researchers’ result. The obtained result of present study presents that by decreasing magnetic parameter, nanoparticle volume fraction parameter, suction parameter, Reynolds number, Brinkman number, and Hartmann number as well as increasing the slip velocity parameter, the generated entropy reduces.
24 citations