Thermal Rectification Enhancement of Coalescence – Jumping Phase Transition Thermal Diodes using Cu‐Al 2 O 3 Hybrid Nanofluids

Herein, a novel coalescence–jumping phase transition thermal diode using hybrid nanofluids, an emerging fluid with proven supreme properties, is first proposed and investigated. The rectification enhancement mechanism investigated by the evaporation performances of working fluid-filled superhydrophilic porous tank. Furthermore, developed mathematical model well-matched experimental results in terms heat transfer performance diodes nanofluids. It worth noting that increasing volume fraction nanofluids does not necessarily improve due to aggregative nanoparticle deposition on surface. In addition, there need balance conductivity (higher copper proportion) stability alumina used for long-term operation. show Cu-Al2O3 nanofluid can be increased 637.4, showing nearly 300% improvement compared water. Overall, remarkable this study promote applications studies various engineering systems management.