NUMERICAL SIMULATION OF MIXED CONVECTION HEAT TRANSFER AND RESULTING ENTROPY USING TWO VIBRATING CYLINDERS INSIDE A CLOSED CAVITY FILLED WITH Cu-AL2O3-WATER HYBRID NANOFLUID. (2026). THE IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING, 25(1), 131-158. https://doi.org/10.32852/d26szn68