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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

The effects of boundary roughness on the MHD duct flow with slip hydrodynamic condition


Authors: Igor Pažanin and Marcone Corrêa Pereira
Journal: Quart. Appl. Math.
MSC (2020): Primary 35B25, 35B40, 76W05
DOI: https://doi.org/10.1090/qam/1686
Published electronically: January 31, 2024
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Abstract: In this paper we present the analytical study of the magnetohydrodynamic (MHD) flow through a rectangular duct driven by the pressure gradient and under the action of the transverse magnetic field. Motivated by various MHD applications in which hydrodynamic slip naturally occur, we prescribe the slipping boundary condition on the upper boundary which contains irregularities as well. Depending on the period of the boundary roughness, we derive three different limit problems by using rigorous analysis in the appropriate functional setting. This approach also enables us to determine the relative contribution of the MHD effect and the slip itself in the governing coupled system satisfied by the velocity and induced magnetic field.


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Additional Information

Igor Pažanin
Affiliation: Department of Mathematics, Faculty of Science, University of Zagreb, Bijenička cesta 30, 10000 Zagreb, Croatia
ORCID: 0000-0003-3384-5184
Email: pazanin@math.hr

Marcone Corrêa Pereira
Affiliation: Department of Applied Mathematics, Instituto de Matemática e Estatística, Universidade de São Paulo, Rua do Matão, 1010, São Paulo, SP, Brazil
MR Author ID: 710820
Email: marcone@ime.usp.br

Keywords: MHD duct flow, rough boundary, hydrodynamic slip, analytical results
Received by editor(s): October 17, 2023
Received by editor(s) in revised form: December 29, 2023
Published electronically: January 31, 2024
Additional Notes: The authors were supported by the Croatian Science Foundation under the project Multiscale problems in fluid mechanics - MultiFM (IP-2019-04-1140). Also, the second author was partially supported by CNPq 308950/2020-8, FAPESP 2020/04813-0 and 2020/14075-6 (Brazil).
Igor Pažanin is the corresponding author
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