Effect of sudden constriction of a flat duct on forced convection in a turbulent droplet-laden mist flow

Numerical modeling of the flow structure and heat transfer in a gas-droplet turbulent duct with forward-facing step is carried out. The two-dimensional RANS equations are used numerical solution. Eulerian two-fluid approach for describing dynamics gaseous dispersed phases. turbulence carrier phase described using an elliptical Reynolds stress model taking presence phase. It shown that finely-dispersed droplets involved separation recirculation motion gas addition evaporating to single-phase leads significant intensification (more than 2 times) compared air flow, all other parameters being equal. This effect enhanced increase initial mass fraction water droplets. Keywords: simulation, transport model, step, droplet evaporation, turbulence, enhancement.