ABSTRACT
In this chapter, chemically reacting flows are presented and discussed. Concepts of mixture properties, reaction rates, and governing conservation equations are outlined. Common types of chemical reactors are described, including a batch reactor, continuous stirred tank, plug flow reactor, and packed bed. Diffusive transport phenomena in both heterogeneous and homogeneous reactions, as well as reactions in a porous catalyst, are presented. Coupled heat and fluid flow with chemical reactions is formulated. Fundamentals of fuels and combustion are introduced, including the combustion process, burning of fuel droplets, and radiation exchange. For multiphase reacting mixtures, two common modeling techniques – shrinking core and progressive conversion models – are presented. Fluidized beds are also briefly introduced, including hydrodynamics, heat and mass transfer, reaction rates, and non-catalytic gas–solid reaction models.
