ドリームパイプ効果に及ぼす振幅と周波数の影響

抄録

Oscillatory flow through pipe can be an important cause in improving the heat transfer of fluids in a variety of engineering fields’ applications. For instance, improvement of cooling performance of electronic equipment is a highly desired problem. In this study, investigations of fluid dynamics of oscillatory flow at three values of low range frequencies (0.10 [Hz], 0.15 [Hz], 0.20 [Hz]) with three different oscillation amplitudes (39.9 [mm], 55.9 [mm], 89.9 [mm]) over narrow horizontal pipe is carried out experimentally. The purpose of this research is to investigate the effective thermal conductivity of the oscillatory flow in the horizontal pipe between the heat source and heat sink. Here, the heat transport performance produced inside the smooth pipes or so called dream pipes is calculated. At higher frequencies with great amplitudes, effective thermal conductivity usually enhances. In general, the increment and decrement in the heat transfer depended chiefly on the oscillation amplitude, oscillation frequency and temperature difference.