円管内雪水二相流の流動モデル
1989 年 5 巻 2 号 p. 2-17
詳細
1989 年 5 巻 2 号 p. 2-17
In order to imitate the transport of snow in a pipe and to compare the calculated results of the pressure loss with the experimental results, some experiments were made by using the two kinds of polystyrene particles because the specific gravity of these particles was as same as the one of ice particles.
The test sections consisted of transparent acrylic pipes with 49.7mm i.d. and the pressure loss was measured by a manometer.
The coefficients of the pressure loss were calculated from Eq.(2). They showed the nega-tive values at high velocities even though the value of the specific gravity was larger than unity, and this result is the same as the one obtained by Shirakashi et al.
The results of the pressure loss were analyzed by three models, that is, Bingham flow model, Shook model and Moving bed flow model. The calculated values of the coefficients of the pressure loss by using these models were in good agreement with the experimental results.
However, these models have merits and demerits respectively, and they are listed in Table 2.
