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Hartmann number

About: Hartmann number is a research topic. Over the lifetime, 2593 publications have been published within this topic receiving 61342 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the effects of Brownian motion and thermophoresis have been included in the model of nanofluid and the governing equations are solved via homotopy perturbation method.
Abstract: In this study, two phase simulation of nanofluid flow and heat transfer between parallel plates is investigated. The important effects of Brownian motion and thermophoresis have been included in the model of nanofluid. The governing equations are solved via homotopy perturbation method. According to comparison with previous works, this method has good accuracy to solve this problem. The semi analytical investigation is carried out for different governing parameters namely; the squeeze number, Hartmann number, Schmidt number and Eckert number. The results indicate that absolute skin friction coefficient decreases with increase of Hartmann number and squeeze number. Also it can be found that that Nusselt number is an increasing function of Hartmann number, Eckert number and Schmidt number but it is a decreasing function of squeeze number.

103 citations

Journal ArticleDOI
TL;DR: In this paper, a model and simulations of the natural convective Fe 3 O 4 -water nanoliquid flow in an annulus between a triangle and a rhombus enclosures are presented.

103 citations

Journal ArticleDOI
TL;DR: In this paper, the influence of magnetic field on nanofluid transportation inside a porous cavity by means of two-temperature model was reported via Control volume based finite element method (CVFEM).

101 citations

Journal ArticleDOI
TL;DR: In this article, a simple two-dimensional model is developed for the perpendicular flow dynamics of boundary layers located on closed magnetic field lines in the equatorial magnetosphere, where nonlocal dissipation associated with the closure of fieldaligned currents in the ionosphere and field-aligned potential drops is included.
Abstract: A simple two-dimensional model is developed for the perpendicular flow dynamics of boundary layers located on closed magnetic field lines in the equatorial magnetosphere. In addition to viscous damping in the equatorial region, nonlocal dissipation associated with the closure of field-aligned currents in the ionosphere and field-aligned potential drops is included and is shown to have two consequences: (1) coupling to the ionosphere causes large-scale disturbances to decay anisotropically and (2) field-aligned potential drops promote long-lived fluctuations at scale lengths that can be comparable to the inverted V scale but which vary with the local Hartmann number (a measure of the ratio of ionospheric resistive friction to magnetospheric viscous friction). Depending on the degree of anisotropy, the combined effect is a tendency for the two-dimensional flow to organize into either relatively isotropic eddies or essentially one-dimensional flow to organize into either relatively isotropic eddies or essentially one-dimensional striations. The limiting case of a one-dimensional flow is considered with applications to the low-latitude boundary layer and internal magnetospheric shear layers. A particular boundary layer equilibrium state is compared with observations of an ionospheric boundary layer region and is found to be in fair agreement with the observed properties for reasonable valuesmore » of the model parameters. It is also shown, under certain conditions, that a monotonically varying internal shear layer can form paired oscillations in the electric field, which are characteristic of the so-called V shocks that occur in and above the auroral acceleration region.« less

101 citations

Journal ArticleDOI
TL;DR: In this article, the authors applied the Buongiorno model to the investigation of nanofluid flow over a stretching plate in the presence of a magnetic field, and the Runge-Kutta method was selected in order to solve the ODEs which are obtained from similarity transformations.

100 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023122
2022234
2021236
2020219
2019231
2018176