Agitation. Heat and Mass Transfer Coefficients in Liquid-Solid Systems

Abstract

An equation is derived, expressing the rate of melting of the solid in a two-phase, single-component, liquid-solid system, based on the rate of heat transfer at the liquid-solid interface. This equation resembles the approximate, integrated form of the cube root law, and the surface coefficient of heat transfer, h, is comparable to the dissolution constant, K.The equation correlating heat transfer data for several liquids in a series of geometrically similar agitators is similar in form to the expression correlating data on mass transfer in the same equipment, and an analogy between heat and mass transfer in liquid-solid agitation systems is indi-INDUSTRIAL AND ENGINEERING CHEMISTRY Vol. 33, No. 11 "K.dp

Heat Transfer to vertical tubes in a mixing vessel

“…Table II is a summary of the data for the 16-inch-diameter 6-blade and the 12-inch-diameter 4-blade turbines. Heat transfer data in mixing as in other operations can be correlated by means of dimensionless groups such as the Reynolds number (8,4). The Reynolds number for mixing is -~p• Values of U for both heating and cooling pipes are designated as ' ,,.,, and f.'c0oi.…”

“…Tees were provided for thermocouple measurements of temperature at the points marked t in each bank. For all the runs reported a liquid depth of 4 feet was used, and the area of heating surface exposed to the mixing liquid for each bank of pipes was 5.22 square feet.…”