TY - JOUR
T1 - Transition from boiling to free convection in supercritical fluid
AU - Tamba, Jun
AU - Takahashi, Toshio
AU - Ohara, Taku
AU - Aihara, Toshio
N1 - Funding Information:
The authors express thanks to JSPS Research Fellowship awarded to J. Tamba. This work is a part of the study supported by Grants in Aid for Scientific Research (No. 06452179 and No. 0239) for the Ministry of Education, Science and Culture of Japan.
PY - 1998/7
Y1 - 1998/7
N2 - Observations of abnormal convection similar to boiling in supercritical fluids have been reported for many years. Recently, a molecular dynamics study performed by the authors clarified that even at the supercritical pressure, an interface accompanied with interfacial tension exists in fluids under a temperature gradient. Such findings have led us to think that the abnormal convection observed slightly above the critical point, which has been called the boiling-like phenomenon, is nothing but a boiling phenomenon. Here we report from this point of view, an experimental observation of the transition from boiling at subcritical pressure to ordinary free convection far above the critical pressure. Visual observation and measurement of the critical heat flux shows that with pressure elevation the phenomenon changes gradually and continuously from boiling to free convection with no drastic changes. The point at which boiling characteristics disappear lies slightly above the critical pressure.
AB - Observations of abnormal convection similar to boiling in supercritical fluids have been reported for many years. Recently, a molecular dynamics study performed by the authors clarified that even at the supercritical pressure, an interface accompanied with interfacial tension exists in fluids under a temperature gradient. Such findings have led us to think that the abnormal convection observed slightly above the critical point, which has been called the boiling-like phenomenon, is nothing but a boiling phenomenon. Here we report from this point of view, an experimental observation of the transition from boiling at subcritical pressure to ordinary free convection far above the critical pressure. Visual observation and measurement of the critical heat flux shows that with pressure elevation the phenomenon changes gradually and continuously from boiling to free convection with no drastic changes. The point at which boiling characteristics disappear lies slightly above the critical pressure.
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U2 - 10.1016/S0894-1777(97)10062-0
DO - 10.1016/S0894-1777(97)10062-0
M3 - Article
AN - SCOPUS:0032124363
VL - 17
SP - 248
EP - 255
JO - Experimental Thermal and Fluid Science
JF - Experimental Thermal and Fluid Science
SN - 0894-1777
IS - 3
ER -