0
research-article

Numerical study of the buoyancy effect on Magnetohydrodynamic three-dimensional LiPb flow in a rectangular duct

[+] Author and Article Information
Tigrine Zahia

Faculty of Physics, Thermodynamics and Energetic Systems Laboratory, University of Sciences and Technology Houari Boumediéne (USTHB), B.P32 El Alia, 16111 Bab Ezzouar, Algiers, AlgeriaUnité de Développement des Equipements Solaires, UDES/Centre de Développement des Energies Renouvelables, CDER, Bou-Ismail 42415, Tipaza, Alegria
phyzahia@yahoo.fr

Mokhtari Faiza

Faculty of Physics, Thermodynamics and Energetic Systems Laboratory, University of Sciences and Technology Houari Boumediéne (USTHB), B.P32 El Alia, 16111 Bab Ezzouar, Algiers, Algeria
faiza_mokhtari@yahoo.fr

Bouabdallah Ahcène

Faculty of Physics, Thermodynamics and Energetic Systems Laboratory, University of Sciences and Technology Houari Boumediéne (USTHB), B.P32 El Alia, 16111 Bab Ezzouar, Algiers, Algeria
abbouab2002@yahoo.fr

Merah Abdelkrim

Faculty of Physics, Thermodynamics and Energetic Systems Laboratory, University of Sciences and Technology Houari Boumediéne (USTHB), B.P32 El Alia, 16111 Bab Ez-zouar, Algiers, Algeria
karim_merah@yahoo.fr

Kharicha Abdellah

Department of Metallurgy, Montauniversität Leoben, Franz-Josef-Str. 18, A - 8700 Leo-ben, Austria
abdellah.kharicha@unileoben.ac.at

1Corresponding author.

ASME doi:10.1115/1.4035636 History: Received July 08, 2016; Revised December 18, 2016

Abstract

In this paper, the effect of transverse magnetic field on a laminar liquid lead lithium flow in an insulating rectangular duct is numerically solved with three-dimensional simulations. Cases with and without buoyancy force are examined. The stability of the buoyant flow is studied for different values of the Hartmann number from 0 to 120. We focus on the combined influence of the Hartmann number and buoyancy on flow field, flow structure in the vicinity of walls and its stability. Velocity and temperature distributions are presented for different magnetic field strengths. It is shown that the magnetic field damps the velocity and leads to flow stabilization in the core fluid and generates MHD boundary layers at the walls, which become the main source of instabilities. The buoyant force is responsible of the generation of vortices and enhances the veloci-ties in the core region. It can act together with the MHD forces to intensify the flow near the Hartmann layers. Two critical Hartmann numbers (Hac1=63, Hac2=120) are found. Hac1 is corresponding to the separation of two MHD regimes; the first one is characterized by a core flow maximum velocity whereas the second regime is featured by a maximum layer velocity and a pronounced buoyancy effect. Hac2 is a threshold value of electromagnetic force indicating the onset of MHD instability through the generation of small vortices close to the side layers.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In