Estimation of Tangential Velocity near Side Wall of Fully Turbulent Agitated Vessel without Baffles

Friction Factor Distribution at the Side Wall of a Turbulent Agitated Vessel with Baffles Using a MAXBLEND Impeller

“…The coefficient K depends on the impeller configuration, so many values have been proposed for various impellers. 8−10 Hiraoka et al 11 evaluated the heat transfer coefficient near the sidewall of the vessel according to the Chilton−Colburn analogy in the fully turbulent regime as follows:…”

“…Heat transfer in the agitated tank with helical coils has been experimentally and numerically studied with Newtonian and non-Newtonian fluids. − On the other hand, the heat transfer through the sidewall of the tank is often conducted in order to simplify the geometry of the tank and for the ease of cleaning. Heat transfer coefficients of the tank wall have been, therefore, investigated by many researchers. − One of the most common estimations of heat transfer in the turbulent regime is the semiempirical nondimensional equation (eq ) in the form of the Nusselt number. The coefficient K depends on the impeller configuration, so many values have been proposed for various impellers. − Hiraoka et al evaluated the heat transfer coefficient near the sidewall of the vessel according to the Chilton–Colburn analogy in the fully turbulent regime as follows: Shiobara et al studied the similarity of heat and momentum transfer at the sidewall of the unbaffled vessel and proposed the following correlation equation in the form of the j -factor. Equations and indicate that the agitated vessel has a certain analogy between thermal boundary layers at the sidewall, and the heat transfer coefficient there can be estimated by the friction factor calculated by the power consumption of the impeller.…”