Abstract
The article is devoted to the generalization of the results of pulse experiments performed under conditions of powerful heat release in supercritical-pressure liquids. The characteristic heating time was changed from 10–3 to 10–2 s, while the heat flux density through the probe surface was increased up to 10 MW/m2. The parameters of the discussion are the values of the speed of crossing the vicinity of the critical temperature and pressure reduced to the critical one. These results obtained for “heater-probe/supercritical fluid” system and based solely on comparison of the primary data indicate a threshold decrease in the intensity of heat transfer near the critical temperature. The purpose of this summary is to suggest a relatively simple approach to reconciling the pulse heating results with the peaks of thermophysical properties derived from experiments in stationary conditions. It is assumed that the action of gradient in temperature and the presence of heat-transfer surface can serve as factors that suppress large-scale fluctuations in pulse heated system, leading to a “smoothing” the critical enhancement of the properties.
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ACKNOWLEDGMENTS
We gratefully acknowledge Jan V. Sengers, Distinguished Research Professor, University of Maryland, for his helpful consultations.
Funding
This study was supported by the Russian Science Foundation (project no. 19-19-00115).
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Rutin, S., Skripov, P. Heat Transfer in Supercritical Fluids: Reconciling the Results of Pulse and Stationary Experiments. High Temp 59, 245–252 (2021). https://doi.org/10.1134/S0018151X21010120
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DOI: https://doi.org/10.1134/S0018151X21010120