Magnetoconvection in fluids with suspended particles under 1g and μg

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Siddheshwar, P.G. and Pranesh, S. (2002) Magnetoconvection in fluids with suspended particles under 1g and μg. Aerospace Science and Technology, 6 (2). pp. 105-114. ISSN 12709638

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Official URL: https://dx.doi.org/10.1016/S1270-9638(01)01144-0

Abstract

The role of magnetic field in the inhibition of natural convection driven by combined buoyancy and surface tension forces in a horizontal layer of an electrically conducting Boussinesq fluid with suspended particles confined between an upper free/adiabatic and a lower rigid/isothermal boundary is considered in 1g and μg situations. The inhibition of convection is caused by a stationary and uniform magnetic field parallel to the gravity field. The magnetically-inert suspended particles are not directly influenced by the magnetic field but are influenced indirectly by the magnetically responding carrier fluid in which they are suspended. A linear stability analysis of the system is performed. The Rayleigh–Ritz technique is used to obtain the eigenvalues. The influence of various parameters on the onset of convection has been analysed. Six different reference steady-state temperature profiles are considered and their comparative influence on onset is discussed. Treating Marangoni number as the critical parameter it is shown that any particular infinitesimal disturbance can be stabilized with a sufficiently strong magnetic field. It is observed that the electrically conducting fluid layer with suspended particles heated from below is more stable compared to the classical electrically conducting fluid layer without suspended particles. The critical wave number is found to be insensitive to the changes in the suspension parameters but sensitive to the changes in the Chandrasekhar number. The problem has possible space applications.

Item Type: Article
Additional Information: cited By 20
Uncontrolled Keywords: Buoyancy; Crystal growth; Eigenvalues and eigenfunctions; Electric conductivity; Electric currents; Heat conduction; Liquid crystals; Magnetic field effects; Maxwell equations; Parameter estimation; Particles (particulate matter); Space applications; Surface tension; Suspensions (fluids); Viscosity of liquids, Magnetoconvection; Micropolar fluids; Suspended particles, Natural convection
Subjects: Faculty of Science > Pure Sciences > Mathematics
Divisions: Jnana Bharathi / Central College Campus > Department of Mathematics
Depositing User: Mr. Kirana Kumar D
Date Deposited: 10 Feb 2016 09:30
Last Modified: 02 Mar 2016 09:52
URI: http://eprints-bangaloreuniversity.in/id/eprint/969

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