Next Article in Journal
A Symmetry of the Einstein–Friedmann Equations for Spatially Flat, Perfect Fluid, Universes
Next Article in Special Issue
Numerical Analysis of Fluid Forces for Flow Past a Square Rod with Detached Dual Control Rods at Various Gap Spacing
Previous Article in Journal
Mechanical Chirality of Rotaxanes: Synthesis and Function
Previous Article in Special Issue
Numerical Analysis with Keller-Box Scheme for Stagnation Point Effect on Flow of Micropolar Nanofluid over an Inclined Surface
Open AccessArticle

Micromagnetorotation of MHD Micropolar Flows

1
Department of Mechanical Engineering, University of West Attica, 12244 Athens, Greece
2
Institute for Bio-Economy and Agri-Technology (IBO), Centre for Research & Technology Hellas (CERTH), 38333 Volos, Greece
3
Fluid Dynamics and Turbomachinery Laboratory, Department of Mechanical Engineering, University of the Peloponnese, 26334 Patras, Greece
*
Author to whom correspondence should be addressed.
Symmetry 2020, 12(1), 148; https://doi.org/10.3390/sym12010148 (registering DOI)
Received: 12 December 2019 / Revised: 8 January 2020 / Accepted: 9 January 2020 / Published: 10 January 2020
(This article belongs to the Special Issue Fluid Mechanics Physical Problems and Symmetry)
The studies dealing with micropolar magnetohydrodynamic (MHD) flows usually ignore the micromagnetorotation (MMR) effect, by assuming that magnetization and magnetic field vectors are parallel. The main objective of the present investigation is to measure the effect of MMR and the possible differences encountered by ignoring it. The MHD planar Couette micropolar flow is solved analytically considering and by ignoring the MMR effect. Subsequently, the influence of MMR on the velocity and microrotation fields as well as skin friction coefficient, is evaluated for various micropolar size and electric effect parameters and Hartmann numbers. It is concluded that depending on the parameters’ combination, as MMR varies, the fluid flow may accelerate, decelerate, or even excite a mixed pattern along the channel height. Thus, the MMR term is a side mechanism, other than the Lorentz force, that transfers or dissipates magnetic energy in the flow direct through microrotation. Acceleration or deceleration of the velocity from 4% to even up to 45% and almost 15% deviation of the skin friction were measured when MMR was considered. The crucial effect of the micromagnetorotation term, which is usually ignored, should be considered for the future design of industrial and bioengineering applications. View Full-Text
Keywords: micropolar fluid; micromagnetorotation effect; couette flow; magnetohydrodynamics micropolar fluid; micromagnetorotation effect; couette flow; magnetohydrodynamics
Show Figures

Figure 1

MDPI and ACS Style

Aslani, K.-E.; Benos, L.; Tzirtzilakis, E.; Sarris, I.E. Micromagnetorotation of MHD Micropolar Flows. Symmetry 2020, 12, 148.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop