Numerical study of enhancing heat transfer by pulsating flow

A numerical study is presented for the enhancement of heat transfer from the not blocks by pulsating flow. Comprehensive studies are carried out to investigate the influence of several parameters, including Renolds number based on the mean flow, Re, Strouhal number, St, pulsation amplitude, A, et al. The results obtained indicate that the flow disturbance and mixing are enhanced due to the flow pulsation, which leads to the enhancement of heat exchange between the hot fluid and the cool fluid in the grooved channel and the augmentation of heat dissipation from the hot blocks. The enhancement of heat dissipation from the blocks is increased with the increase in Re and A, and there exists an optimal Strouhal number for this model. The results also show that the transient pressure drop varies sinusoidally, but periodic averaged pressure drop is close to the steady case.