A novel approach to antimicrobial strategies using heat transfer rate micropolar nanofluids with angular momentum and Lorentz force‐enhanced

Abstract The Arrhenius activation energy concept is a fundamental principle in thermal engineering, providing insights into chemical reactions, material degradation, and heat transfer processes at elevated temperatures. This principle is crucial for designing efficient heat transfer systems and fluid‐based applications where precise viscosity control is essential. A study focusing on a three‐dimensional Casson nanofluid flow across an extended porous surface was conducted using the Navier‐Stokes theory and MATLAB to implement a novel numerical approach based on the three‐stage Lobatto IIIA technique. This study offers valuable insights into how various parameters influence the flow characteristics of Casson nanofluids, with significant implications across multiple engineering disciplines. Increasing the magnetic parameter introduces a Lorentz force that reduces flow velocity and elevates temperature, which is particularly relevant for systems employing magnetohydrodynamic flow control. Elevating the Eckert number enhances temperature and velocity profiles while diminishing heat transfer and shear stress, crucial for designing systems where viscous dissipation plays a significant role. A comprehensive understanding of nanofluid behavior is essential in microfluidics for developing lab‐on‐a‐chip devices and micro‐scale heat exchangers, where precise thermal management is vital. The findings can inform the design of artificial organs and drug delivery systems in biomedical engineering, where controlling fluid dynamics and thermal properties is crucial for functionality and patient safety. Insights into fluid behavior under varying thermal conditions can aid in optimizing energy systems, including solar thermal collectors, geothermal units, and advanced nuclear reactors, leading to improved efficiency and performance. Understanding temperature‐dependent flow behavior benefits processes like metal casting and polymer extrusion, ensuring product quality and consistency in the material processing industry. By integrating these findings, engineers and industry professionals can develop more efficient and effective systems across these applications, leveraging the unique properties of nanofluids to address complex thermal and flow challenges. The application of Arrhenius activation energy concepts to Casson nanofluid flow represents a powerful tool in thermal engineering, providing a framework for precise modeling of complex flow behaviors.