Abstract
An efficient model of studying heat and mass transfer to the surface of two contacting unequal balls with arbitrary thermal conductivity is presented. The axisymmetric thermodiffusion problem is solved in a quasistationary approximation at small Peclet numbers using three-dimensional Laplace equations with linearized boundary conditions. Solutions that can be obtained using the proposed model for problems that are similar in mathematical formulation to the studied one can be used for designing chemical engineering unit operations dealing with evaporation or condensation, adsorption or desorption, combustion or chemical reactions at the interfaces in a disperse system.
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