Stagnation flow reactors simulations

Several investigators have studied the potentially complex flow in actual stagnation-flow reactors, using two-and three-dimensional Navier-Stokes simulations [116,117,133,183, 203,228,348,419] and flow visualization [45], Generally speaking, the departure from... 

A simulation of catalytic combustion in a stagnation-flow reactor, using this reaction mechanism, is given in Chapter 17. 

It is probably clear that any number of performance indexes can be written by comparing the various mass fluxes. The important point is that for the stagnation-flow geometries, all the mass fluxes can be written per unit surface area. Thus the indexes, which are ratios of fluxes, are independent of reactor size, so long as the reactor preserves the desirable similarity behavior. It is also important to note that these effectiveness indexes can be derived from the one-dimensional similarity simulations that consider the detailed chemical reaction behavior. 

Figure 6 shows a hot-filament CVD reactor together with a sketch of a stagnation-point flow the simulation is based on. A mixture of H2 and CH4 passes a hot fllament placed at a distance L = 1 cm away from the substrate. The pressure is 33.3 mbar, the temperature of the filament 2430 K, the temperature of the substrate is varied between 800 and 1240 K, and the gas composition is 0.4 mole% CH4 in H2. The corresponding Navier-Stokes equations [10,16] of... 

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