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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.


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TL;DR: In this article, the influence of a magnetic field on the nanofluid hydrothermal behavior in a porous curved enclosure is examined, and a new numerical approach is applied, namely the Control Volume-based Finite Element Method (CVFEM).
Abstract: The influence of a magnetic field on the nanofluid hydrothermal behavior in a porous curved enclosure is examined. A constant heat flux condition is considered for the inner wall. A new numerical approach is applied, namely the Control Volume-based Finite Element Method (CVFEM). Impacts of Darcy (Da) , Rayleigh (Ra) , Hartmann (Ha) numbers and volume fraction of Fe3O4 ( $ \phi$ ) on the hydrothermal treatment are graphically depicted in figures. Results reveal that the thermal boundary thickness increases with increasing Ha while it decreases with increasing Ra , $ \phi$ , Da . Nanofluid motion decreases with increasing the Hartmann number but it increases with increasing the Darcy number. At low Darcy and high Hartmann numbers, impact of adding Fe3O4 is more effective.

163 citations

Journal ArticleDOI
TL;DR: In this paper, the stability of two-dimensional laminar motion of an electrically conducting fluid under a transverse magnetic field was investigated and it was found that the dominating factor is the change in shape of the undisturbed velocity profile caused by the magnetic field, which depends only on the Hartmann number M.
Abstract: The stability under small disturbances is investigated of the two-dimensional laminar motion of an electrically conducting fluid under a transverse magnetic field. It is found that the dominating factor is the change in shape of the undisturbed velocity profile caused by the magnetic field, which depends only on the Hartmann number M . Curves of wave number against Reynolds number for neutral stability are calculated for a range of values of M ; for large values of M the calculations are similar to those which determine the stability of ordinary boundary-layer flow. The critical Reynolds number is found to rise very rapidly with increasing M , so that a transverse magnetic field has a powerful stabilizing influence on this type of flow.

161 citations

Journal ArticleDOI
TL;DR: In this paper, a mixed convection of CuO-water nanofluid filled lid driven cavity having its upper and lower triangular domains under the influence of inclined magnetic fields is numerically investigated.

159 citations

Journal ArticleDOI
TL;DR: In this paper, the authors have analyzed the effect of additive nanoparticles on heat transfer and entropy generation on laminar natural convection of non-Newtonian nanofluids in the presence of an external horizontal magnetic field in a square cavity.

156 citations

Journal ArticleDOI
TL;DR: In this article, the effect of magnetic field on Ag-MgO nanofluid forced convection and heat transfer in a channel with active heaters and coolers is analyzed.

153 citations


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