抄録
Motion of swarms of particles falling through a stagnant as well as flowing water are investigated experimentally. A series of laboratory experiments is conducted, chainging size as well as amount of dumping particles and the magnitude of ambient flow velocity. Such main flow characteristics of suspension thermals as geometry constants, entrainment funtions, main flow characteristics (half-width, mean buoyancy force and falling velocity), and others are examined and several important empirical relationships to adequetly describe characteristics of the flows are proposed. In addition, the transitional condition from the suspension thermal-like phase the free settling-like phase is roughly estimated.
