f8cb84a0-83c4-4a30-bbdb-4fc34bfee72a20230727093240923wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER1790-50442224-34611790-504410.37394/232012http://wseas.org/wseas/cms.action?id=40412720232720231810.37394/232012.2023.18https://wseas.com/journals/hmt/2023.phpAbderrahimMokhefiMechanics, Modeling and Experimentation Laboratory L2ME, Faculty of Technology, Bechar University, B.P.417, 08000, Bechar, ALGERIAEugenia RossiDi SchioDepartment of Industrial Engineering DIN, Alma Mater Studiorum – University of Bologna, Viale Risorgimento 2, 40136, Bologna, ITALYPaoloValdiserriDepartment of Industrial Engineering DIN, Alma Mater Studiorum – University of Bologna, Viale Risorgimento 2, 40136, Bologna, ITALYCesareBiserniDepartment of Industrial Engineering DIN, Alma Mater Studiorum – University of Bologna, Viale Risorgimento 2, 40136, Bologna, ITALYIn the present paper, an investigation of the effect of a magnetic field and nanoparticles suspended in pure water on the forced flow in a duct containing an elastic rectangular fin is performed. The nanofluid, i.e., CuO nanoparticles suspended in water, flow in the duct with an inlet fully developed velocity profile and a cold temperature. The lower boundary of the duct is kept at a hot temperature, while the upper boundary is adiabatic. According to the ALE formulation, numerical simulations of the laminar flow are carried out, by employing the software package Comsol Multiphysics, to solve the governing equation system: mass, momentum, energy, and deformation. The behavior of the Nusselt number, of the temperature and velocity fields as well as of the stress profiles are presented and interpreted. As a result, the addition of CuO nanoparticles to pure water improves the local and global heat transfer rate by up to 21.33% compared to pure water. 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