Transport of heat and mass between liquids and spherical particles in an agitated tank

Abstract

Abstract Data are reported for heat transfer from water to melting ice spheres and for mass transfer in the case of dissolving spheres of pivalic acid suspended in water agitated in a stirred vessel. The transport coefficients are found to depend on agitator power input but not on agitator design, in agreement with the Kolmogoroff theory. These experimental results are used with others in the literature to develop a correlation involving Nusselt and Prandtl or Schmidt numbers together with a dimensionless group involving agitation power. The correlation is essentially independent of solid‐liquid density ratio in the range 0.8 to 1.25, and in this range the gravity group also appears to be unimportant.