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Title: On the interaction between the external magnetic field and nanofluid inside a vertical square duct

In this paper, we numerically study how the external magnetic field influences the flow and thermal characteristics of nanofluid inside a vertical square duct. The flow is considered to be laminar and hydrodynamically as well as thermally developed, whereas the thermal boundary condition of constant heat flux per unit axial length with constant peripheral temperature at any cross section, is assumed. The governing equations are solved using the spectral method and the finite difference method. Excellent comparison is noted in the numerical results given by the two methods but the spectral method is found to be superior in terms of both efficiency and accuracy. We have noted that the flow reversal due to high Raleigh number may be controlled by applying an external magnetic field of suitable strength. Moreover, the Nusselt number is found to be almost a linear function of the nanoparticle volume fraction parameter, for different values of the Raleigh number and the magnetic parameter.
Authors:
; ; ; ;  [1]
  1. Centre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan (Postal Code: 60800) (Pakistan)
Publication Date:
OSTI Identifier:
22492131
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; ACCURACY; BOUNDARY CONDITIONS; COMPARATIVE EVALUATIONS; DUCTS; EFFICIENCY; FINITE DIFFERENCE METHOD; HEAT FLUX; LAMINAR FLOW; MAGNETIC FIELDS; NANOFLUIDS; NANOPARTICLES; NUMERICAL ANALYSIS; NUSSELT NUMBER; RAYLEIGH NUMBER