充填層の対流伝熱係数におよぼす粒子近傍の空間分布の影響
1998 年 84 巻 6 号 p. 399-404
詳細
1998 年 84 巻 6 号 p. 399-404
Convective heat transfer coefficient between a spherical particle and a liquid in packed beds were measured for the range of 77≤Re≤2000. The convective heat transfer coefficients measured by this work were quite smaller than the values obtained by the empirical equations proposed previously. Therefore, flow visualization was carried out to investigate the water flow around the particle in the packed beds. Temperature distribution and velocity of water in packed beds were also investigated by the numerical simulation.
It was found that the space around the particle, especially the space at the flank of the particle causes decrease of convective heat transfer coefficient between a spherical particle and a liquid in packed beds.
