Numerical investigation of radiative magneto-micropolar flow and heat transfer in a channel with dual cylinders

This study presents a finite element investigation of radiative magneto-micropolar flow and heat transfer in a channel containing two circular cylinders in tandem configuration. The novelty lies in the coupled analysis of microrotation–vorticity interaction, magnetic field effects, and thermal radiation in a confined multi-body geometry. The governing equations for mass, momentum, angular momentum, and energy are solved using a Taylor–Hood finite element scheme and validated against the Turek-Schäfer benchmark. A systematic parametric study is conducted for R e = 100 -400, K = 0 . 001 -0.1, and relevant thermal and magnetic parameters. Results show that increasing Reynolds number enhances flow separation and heat transfer, reducing thermal boundary layer thickness by up to 35%. The micropolar parameter significantly intensifies microrotation in wake regions, while magnetic effects suppress vortex structures and stabilize the flow. Thermal radiation increases fluid temperature levels and contributes to heat transfer enhancement. A maximum heat transfer enhancement of approximately 40% is achieved under combined effects. The study provides new insights into multiphysics coupling mechanisms and offers design guidelines for advanced thermal systems involving complex fluids.

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