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Title: Transport and deposition of neutral particles in magnetohydrodynamic turbulent channel flows at low magnetic Reynolds numbers
Authors: Δριτσέλης, Χρήστος Δ.
Σαρρής, Ιωάννης Ε.
Φείδαρος, Δημήτρης Κ.
Βλάχος, Νικόλας Σ.
Item type: Journal article
Keywords: MHD;Turbulent channel flow;Particle transport;Deposition;Μεταφορά σωματιδίων;Εναπόθεση;Τυρβώδους ροής κανάλι
Subjects: Technology
Issue Date: 7-May-2015
Date of availability: 7-May-2015
Publisher: Elsevier
Abstract: The effect of Lorentz force on particle transport and deposition is studied by using direct numerical simulation of turbulent channel flow of electrically conducting fluids combined with discrete particle simulation of the trajectories of uncharged, spherical particles. The magnetohydrodynamic equations for fluid flows at low magnetic Reynolds numbers are adopted. The particle motion is determined by the drag, added mass, and pressure gradient forces. Results are obtained for flows with particle ensembles of various densities and diameters in the presence of streamwise, wall-normal or spanwise magnetic fields. It is found that the particle dispersion in the wall-normal and spanwise directions is decreased due to the changes of the underlying fluid turbulence by the Lorentz force, while it is increased in the streamwise direction. The particle accumulation in the near-wall region is diminished in the magnetohydrodynamic flows. In addition, the tendency of small inertia particles to concentrate preferentially in the low-speed streaks near the walls is strengthened with increasing Hartmann number. The particle transport by turbophoretic drift and turbulent diffusion is damped by the magnetic field and, consequently, particle deposition is reduced.
Language: English
Citation: DRITSELIS, C.D., SARRIS, I.E., FIDAROS, D.K. & VLACHOS, N.S. (2011). Transport and deposition of neutral particles in magnetohydrodynamic turbulent channel flows at low magnetic Reynolds numbers. International Journal of Heat and Fluid Flow. [Online] 32 (2). p.365–377. Available from:[Accessed 01/02/2011]
Journal: International Journal of Heat and Fluid Flow
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
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