ABSTRACT
Unlike the flow of a single phase liquid or gas, the carrier phase of a dispersed phase flow contains dispersed particles or droplets as shown in Figure 6.1. For purposes of analysis, the ideal situation would be to solve the governing conservation (continuity, momentum and energy) equations for the carrier phase by accounting for the boundary conditions imposed by each and every particle or droplet in the field together with the boundary condition at the wall. This would provide a complete description of the carrier phase throughout the mixture. For computation, this would require a grid dimension smaller than the smallest particle in the field. In addition, provision would have to be made for the continuous movement of the surfaces. Such a solution would be regarded as complete numerical simulation. An industrially relevant application may require the solution with trillions of particles or droplets. Such a solution is beyond current computer capability.
