Journal of Thermal Analysis and Calorimetry, Journal Year: 2024, Volume and Issue: 149(12), P. 6433 - 6457

Published: May 30, 2024

Abstract This numerical research study focuses on impacts of using twisted rib geometry the hydrothermal performance and entropy generation characteristics biologically synthesized Ag/water nanofluid flowing in heat sink ‌minichannels. To this end, twelve different geometries (Case 1 to 12) were designed where double-row ribs at bottom top portions with twist angles between − 45° + 45°. elucidate cooling comprehensively, four Reynolds numbers (Re = 500, 1000, 1500, 2000) nanoparticle concentrations ( $$ \varphi \hspace{0.17em}$$ φ 0%, 0.1%, 0.5%, 1%) included computations. Results revealed that significantly smoothen fluid flow reduces pressure drop remarkably depending angles, nevertheless, it deteriorates performance. In Case 12, convective transfer coefficient by up 15.8% Re 2000 \varphi$$ =1%, compared base case. However, pumping power requirement is decreased 43.9% Nanoparticle incorporation contributes enhancement 13.5% lowest Re. Frictional considerably decreases (up 31%) when are utilized. thermal can increase 36%, due ineffective ribs. work be regarded as a first field concerning effects nanofluid-cooled mini-channel sinks.

Language: Английский