Surface‑Catalyzed Hybrid Nanofluid Flow Over a Stretching Cylinder and a Flat Surface: A Comparison

ABSTRACT

Surface‐catalyzed reactions and hybrid nanofluids are widely used to improve transport and thermal performance in engineering systems. This study examines stagnation‐point flow of an alumina‐silver/kerosene oil hybrid nanofluid over a stretching cylinder and compares the results with a flat surface. The model includes homogeneous‐heterogeneous and surface‐catalyzed reactions, Hall current, magnetic field effects, velocity and thermal slip, variable thermal conductivity, modified Fourier heat flux, and non‐uniform heat generation or absorption. The governing equations are transformed into dimensionless form and solved with MATLAB bvp4c. Results show that surface curvature significantly affects velocity, temperature, and concentration distributions. Magnetic forces suppress velocity, whereas Hall current enhances it. Smaller chemical time constants strengthen reaction rates. Heat source and sink parameters produce opposite thermal responses. Slip modifies the momentum boundary layer.