Topic
Hartmann number
About: Hartmann number is a research topic. Over the lifetime, 2593 publications have been published within this topic receiving 61342 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the effect of a magnetic field on nanofluid natural convection in a porous annulus is simulated, and the influence of tilted angle and Darcy, Rayleigh and Hartmann numbers on the behavior of nanofluid hydrothermal behavior is taken into account.
Abstract: Purpose
The effect of a magnetic field on nanofluid natural convection in a porous annulus is simulated. Control volume-based finite element method (CVFEM) is applied to find the influence of tilted angle and Darcy, Rayleigh and Hartmann numbers on nanofluid hydrothermal behavior. Vorticity stream function formulation is taken into account. Also, Brownian motion effect on nanofluid thermal conductivity is considered. Results reveal that Hartmann number and tilted angle make changes in nanofluid flow style. Nusselt number enhances with augment of Darcy number and buoyancy forces but reduces with rise of tilted angle and Hartmann number.
Design/methodology/approach
The influence of adding CuO nanoparticles in water on the velocity and temperature distribution in an inclined half-annulus was studied considering constant heat flux. CVFEM is applied to the simulation procedure.
Findings
Influences of CuO volume fraction, inclination angle and Rayleigh number on hydrothermal manners are presented.
Originality/value
Results indicate that inclination angle makes changes in flow style. The temperature gradient enhances with rise of buoyancy forces, whereas it reduces with augment of inclination angle.
59 citations
TL;DR: In this article, the asymptotic behavior of the solution of an electrically conducting viscous incompressible fluid in a rotating system under the influence of a uniform transverse magnetic field is investigated when one of the plates is set into motion with the time dependent velocity in its own plane.
59 citations
TL;DR: In this article, the effects of pertinent parameters such as external Rayleigh number (between 104 and 106), internal rayleigh number, Hartmann number, elastic modulus of flexible wall (between 500 and 105), and inclination angle of the magnetic field (between 0° and 90°) on fluid flow and heat transfer characteristics were numerically investigated.
59 citations
TL;DR: In this paper, artificial neural networks back-propagated with Levenberg Marquardt scheme (ANN-BLMS) is presented to analyze the entropy generation of carbon nanotubes (CNTs) between two rotating stretching discs under the influence of thermal radiation and magneto-hydrodynamic nano-fluid flow model.
59 citations
TL;DR: In this article, the effect of uniform suction/blowing on steady two-dimensional laminar forced MHD Hiemenz flow against a flat plate with variable wall temperature in a porous medium is numerically analyzed.
Abstract: The effect of uniform suction/blowing on steady two-dimensional laminar forced MHD Hiemenz flow against a flat plate with variable wall temperature in a porous medium is numerically analyzed. The nonlinear boundary-layer equation were transformed and the resulting ordinary differential equations were solved by Keller box method. Numerical results for the dimensionless velocity profiles, the temperature profiles, the local friction coefficient and the local Nusselt number are presented for various values of Prandtl number Pr, the Hartmann number M, exponent of wall temperature λ, the permeability parameter Ω, and suction/blowing parameterf
w
. Generally, it has been found that the local friction coefficient and the local Nusselt number increase owing to suction of fluid and increasing Ω. This trend reversed for blowing of fluid and decreasing Ω. The type of flow is from pure fluid flow for Ω is very small changed into pure Darcy flow for Ω is very large.
59 citations