Thermo-magnetic convection of paramagnetic fluids with non-instantaneous heating

Saha, Suvash C. & Gu, YuanTong (2012) Thermo-magnetic convection of paramagnetic fluids with non-instantaneous heating. In Brandner, P.A. & Pearce, B.W. (Eds.) Proceedings of the 18th Australasian Fluid Mechanics Conference, Australasian Fluid Mechanics Society, University of Tasmania, Launceston, TAS.

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Abstract

The unsteady boundary-layer development for thermomagnetic convection of paramagnetic fluids inside a square cavity has been considered in this study. The cavity is placed in a microgravity condition (no gravitation acceleration) and under a uniform magnetic field which acts vertically. A ramp temperature boundary condition is applied on left vertical side wall of the cavity where the temperature initially increases with time up to some specific time and maintain constant thereafter. A distinct magnetic convection boundary layer is developed adjacent to the left vertical wall due to the effect of the magnetic body force generated on the paramagnetic fluid. An improved scaling analysis has been performed using triple-layer integral method and verified by numerical simulations. The Prandtl number has been chosen greater than unity varied over 5-100. Moreover, the effect of various values of the magnetic parameter and magnetic Rayleigh number on the fluid flow and heat transfer has been shown.

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ID Code: 57211
Item Type: Conference Paper
Refereed: Yes
Keywords: Thermo-magnetic convection, paramagnetic fluids, non-instantaneous heating, Scaling analysis
ISBN: 978-0-646-58373-0
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Australasian Fluid Mechanics Society.
Deposited On: 13 Feb 2013 06:38
Last Modified: 14 Feb 2013 18:20

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