Enhancing thermal management in channels with sinusoidal elastic obstacles and pulsating nano-jet impingement: A new model

This study presents a new model for effective thermal management of a channel with elastic sinusoidal obstacles and pulsating multiple nano-jet impingements. The channel was cooled by alumina Al2O3 in various forms (platelets, blades, cylinders, and bricks) and water as a basic fluid. A hybrid nanofluid (multi-wall carbon nanotube-Fe3O4) was also used. The governing equations were solved using the finite volume method. Results were recorded for Reynolds numbers (Re = 350), Strouhal numbers (St = 0.01-1), pulse amplitude (A = 0.25-1), and the number of slots (Nj = 1-13). The results showed that the cooling efficiency was improved by using pulsating flow by 24.383%. It was also noted that using sinusoidal elastic obstacles improved the heat transfer rate by 8.344%. In addition, the number of slots affected the heat transfer rate, increasing it to 259.983%. The results obtained from this study demonstrate the effectiveness of the proposed design, which incorporates elastic sinusoidal obstacles and pulsating multiple nano-jet impingements, in significantly improving thermal management performance and reliability. These advancements hold great importance in various industrial and consumer applications.