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For the first time, numerical simulations of mass transfer for real flow conditions have been made in a wavy liquid film falling down a vertical wall. Hydrodynamical parameters have been calculated by solving the Kapitsa-Shkadov system with a semi-parabolic velocity profile. Calculations have been performed with natural waves and forced waves. Optimal frequencies of forced inlet disturbances that enhance the mass transfer have been found along with the main mechanisms of the mass transfer. The calculated mass absorption has been compared with experimental data and a good agreement was obtained.

Optimal Regimes of Heat-Mass Transfer in a Falling Film