Abstract
The article analyzes convective heat and mass transfer in the flow passages of tube-fin exchangers, adopting a simplified two-dimensional approach. The flow structure on the airside of these devices is spatially periodic, with fully developed conditions prevailing a short distance from the entrance. In numerical simulations, symmetric and/or antisymmetric periodicity in pressure, velocity components, temperature, and mass concentration of the water vapour are taken into account to reduce the computational domain. Using a finite-element discretization velocity, temperature and mass concentration fields are computed within wavy, offset-strip, and louver fin surfaces. Quantitative results are also obtained for friction factors, Nusselt numbers, and Colburn factors for heat and mass transfer.
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