撹拌に関する―考察
変動流によって散逸するエネルギー(櫂型撹拌羽根)
1957 年 21 巻 3 号 p. 139-146
詳細
1957 年 21 巻 3 号 p. 139-146
Power delivered be impeller into liquid in a mixing tank is dissipated, in due course, into irreversible form of heat energy by the shearing force of liquid. Broadly speaking, the mechanism of energy dissipation is first found in velocity gradient of the stationary flow (principal contribution is seen in the boundary film along the tank wall, bottom and so on) and secondly, in velocity fluctuations superposed on the former. Since the energy lost by the latter mechanism is considered to be intrinsic in mixing, the quantitative estimation of this energy (temporarily defined as the effective mixing energy) was carried out, following the flow pattern studies reported by the author in the previous papers.1).2)
