A flow laden with particles is characterized by coupling between phases, e.g., thermal coupling, momentum coupling and mass coupling. These coupling mechanisms complicate the analysis of gas-particle flows. Analytical methods to this phenomena are categorized as two-fluid eqn. model and trajectory model. A gas-particle venturi flow is analysed by using a quasi-one dimensional trajectroy model (CONVAS model).
The particle loading and Stokes number found to be very important parameters which influence pressure drop in the venturi. It is also found that smaller particles cause more pressure drop and that the ratio of pressure drops is linearly proportional to the particle loading. A drawback of the present method is that the pressure drop due to the skin friction and the heat transfer through the pipe wall can not be adequately predicted.
