RT Journal Article ID 52a3343237f0f337 A1 Yoon, I. A1 Ma, Hongbin A1 Winholtz, R. A. T1 STUDY OF THE EFFECTS OF LIQUID FRACTION AND VAPOR VOLUME ON THE FLUCTUATING TEMPERATURE IN AN OSCILLATING HEAT PIPE USING NEUTRON IMAGING JF Heat Transfer Research JO HTR YR 2013 FD 2013-02-21 VO 44 IS 1 SP 43 OP 57 K1 oscillating heat pipe K1 neutron imaging AB This paper presents an experimental study of the correlation between liquid motion and temperature change in an oscillating heat pipe (OHP). The images of the liquid motion were made using the neutron imaging technique. An algorithm to calculate the vapor and liquid fractions at each position of the OHP from the images has been developed. By comparing the average liquid fractions and the temperature data in the evaporator, it is shown that a quick liquid motion is synchronized with a quick temperature change. By comparing the distance from the two-phase interface to the edge of the evaporator with the vapor portion length and temperature, this study concludes that the vapor volume changes are directly related to those of temperature. A decrease in the temperature was observed before it increased due to the liquid motion. This temperature drop could also be due to thin film evaporation. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,7b4796742ab8f489,52a3343237f0f337.html