Laminar Entrained Flow Reactor

Within the context of a study aimed at the determination of the pyrolysis kinetics of polymers using a laminar entrained flow reactor (LEFR), Westerhout et al (1996) developed a comprehensive model that couples a single-particle con- 

In Fig. 29 a schematic drawing of the LEFR used by Westerhout et al. is shown. The polymer particles are fed to the reactor through a central cooled pipe ( cold finger ) with the aid of a small nitrogen stream and subsequently they are heated by the annular nitrogen stream supplied through the flow distributor. Due to the 

Non-Newtonian flows need much more attention since in many industrial applications the chemical engineer has to deal with materials that exhibit a complex rheological behavior that cannot (even approximately) be described with Newtonian closure models. 

As is evident from inspection of Table III turbulence modeling of multiphase flow systems requires major attention in the near future. Also the development of closure laws for phenomena taking place in the vicinity of interfaces such as coalescence, breakup, and accumulation of impurities should be considered in more detail. Once these requirements have been met, in principle, it would be possible to predict a.o. flow regime transition and the spatial distribution of the phases with confidence, which is of utmost importance to the chemical engineer dealing with the design of (novel) multiphase reactors. 

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