Numerical simulation of magnetohydrodynamic flow in a toroidal duct of square cross-section

S. Vantieghem, B. Knaepen

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We present numerical simulation results of the quasi-static magnetohydrodynamic (MHD) flow in a toroidal duct of square cross-section with insulating Hartmann walls and conducting side walls. Both laminar and turbulent flows are considered. In the case of steady flows, we present a comprehensive analysis of the secondary flow. It consists of two counter-rotating vortex cells, with additional side wall vortices emerging at sufficiently high Hartmann number. Our results agree well with existing asymptotic analysis. In the turbulent regime, we make a comparison between hydrodynamic and MHD flows. We find that the curvature induces an asymmetry between the inner and outer side of the duct, with higher turbulence intensities occurring at the outer side wall. The magnetic field is seen to stabilize the flow so that only the outer side layer remains unstable. These features are illustrated both by a study of statistically averaged quantities and by a visualization of (instantaneous) coherent vortices.

Original languageEnglish
Pages (from-to)1120-1128
Number of pages9
JournalInternational Journal of Heat and Fluid Flow
Volume32
Issue number6
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

Keywords

  • Curved duct
  • Hartmann layer
  • Magnetohydrodynamics

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

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