Ahlam Aljabali, Abdul Rahman Mohd Kasim, Nurul Amira Zainal, Najiyah Safwa Khashi’ie, Iskandar Waini, Noor Amalina Nisa Ariffin, Adeshina Taofeeq Adeosun
ABSTRACT Hybrid nanofluids offer improved heat transfer performance, making them attractive for advanced thermal management systems. This study examines the Eyring–Powell Cu–Al 2 O 3 /water hybrid nanofluid flow over a vertically permeable stretching/shrinking cylinder in the presence of magnetic fields and Joule heating. The governing model is reduced to a system of nonlinear equations and solved numerically using MATLAB's bvp4c solver. Results show the occurrence of dual solutions, with stability analysis indicating that only the stable branch is physically realizable. Heat transfer is suppressed by increasing Eckert numbers and curvature parameters, while suction effects, nanoparticle selection, and boundary conditions strongly influence both flow characteristics and thermal response.