Fully coupled two-phase numerical model for falling film absorption in a vertical parallel plate channel
Abstract A two-phase numerical simulation is performed to investigate the absorption of water vapour into an aqueous lithium bromide solution inside a parallel plate vertical channel. The liquid film and vapour phase interactions and concurrent heat and mass interchange is modelled using a two-dimensional steady laminar flow model and a fully-coupled marching numerical scheme. The capability of this new model is examined by comparisons to the previous numerical results for a liquid film flowing over a cold wall. The numerical predictions are examined for the effect of the following operating parameters: the liquid film Reynolds number, the inlet mass fraction, and the wall temperature. New results are provided on the impact of the gas phase Reynolds number variation from 1000 to 3000 on the liquid film development along the channel.