Optimal-Order Switching-Aware Time Integration for Switched Process Models Governed by Semilinear Parabolic Equations Mouloud Aoudia Irreversibility Analysis of a Radiated Oldroyd-B Hybrid Nanofluid with Viscous Dissipation Effects Akhtar Ali, Manzoor Ishaq , Sami Ullah Khan 2025, Volume VI, Issue 2