Liang Zhang, Wanshou Xu, Yilin Kong, Hedong Xing, Ning Liu, Huilin Zhang, Hongfa Liu, Jiabai Song
Efficient energy utilization is a core challenge faced by modern thermal systems. This study aims to investigate the synergistic effects of magnetic fields and pulsating flow fields on the fluid flow and heat transfer characteristics of Fe 3 O 4 -H 2 O nanofluids in wavy-walled tubes. Using numerical simulation methods, this study conducted a comparative analysis of the flow field variations under this dual enhancement strategy. The results show that the synergistic interaction can effectively enhance fluid turbulence, generate radial velocity components, disrupt the boundary layer, and promote fluid mixing, thereby improving heat transfer efficiency. Analysis of the heat transfer characteristics indicates that the heat transfer enhancement coefficient E h increases with the amplitude of pulsation A m , suggesting that increasing A m can strengthen the synergistic enhancement effect of the magnetic field and pulsating flow field; additionally, E h also increases with the Reynolds number Re , albeit at a gradually decreasing rate. Compared with a single magnetic field, the synergy of the magnetic field and pulsation can increase E h by up to 6.2%.