Effect of particle size on modulating turbulent intensity

Gas-solid flows are important to many industrial processes such as pulverized coal combustors and fluidized beds. In these and other processes, gas-particle interactions have a dominating influence on heat and mass transfer. While gas-solid flows have been the focus of extensive research for many years there does not yet exist a consensus on the effect of particles on changing the turbulent intensity of the carrier phase. This paper brings together the work of various researchers and proposes a simple physical model to explain the increase or decrease of turbulent intensity caused by the addition of particles.