Two-fluid modeling of aerosol transport in laminar and turbulent flows

The two-fluid model has been adapted to dilute dispersions of dense inclusions (i.e. particles) carried by laminar or turbulent hows where an exchange of momentum takes place between particles and fluid. It is assumed that the medium is isothermal and free of phase change. The model is used to simulate different experimental applications and the simulations are compared to the experimental data. Examples of validation are given along the paper. In the laminar regime, the flow and deposition of particles around a bent pipe are studied experimentally, with a theory and numerically as well. In the turbulent regime, a new experiment called AEROJET which is a turbulent axisymmetric two-phase jet lair-glass beads) has been performed in order to provide original data, On the other hand, the average and fluctuating velocities of the air and of the glass beads are predicted by the model. In particular, the influence of the inclusions on the carrier gas is underscored. The agreement between the experimental and numerical results is very good This validates our two-fluid modeling both in the laminar and in the turbulent regimes and proves its ability to calculate various complicated diphasic hows involving aerosols transport. (C) 1998 Elsevier Science Ltd. All rights reserved.