On the oscillatory nature of heat transfer in steady annular flow
Author(s)Su, Guanyu; D'Aleo, Francesco Paolo; Phillips, Bren Andrew; Streich, Robin Mark; Al-Safran, Eissa; Buongiorno, Jacopo; Prasser, Horst-Michael; ... Show more Show less
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Using a combination of high-speed infrared thermography and electrical-conductance sensors, we observe the surprisingly large effect of surface waves on the instantaneous heat transfer response at the heated wall in nominally-steady upward annular flow of steam-water mixtures. While the heat flux applied at the wall is constant, the passage of the waves causes significant periodic oscillations of the local heat transfer coefficient and wall superheat in the forced convective evaporation regime, with amplitudes and periods much higher than the fluctuations due to turbulent eddies. We discuss the physical mechanisms potentially responsible for the experimental observations.
DepartmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineering
International Communications in Heat and Mass Transfer
Su, Guan-Yu et al. "On the oscillatory nature of heat transfer in steady annular flow." International Communications in Heat and Mass Transfer 108 (November 2019): 104328 © 2019 Elsevier Ltd
Author's final manuscript