Subgrid-Scale Segregation of Chemically Reactive Species in a Neutral Boundary Layer

  • J. P. Meeder
  • F. T. M. Nieuwstadt
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 5)


We study the binary reaction between an ambient species and a species emitted from a point source in the form of a plume. The concentration of both species is simulated in a neutral boundary layer with help of large-eddy simulation. The contribution of subgrid-scale segregation of the reactants is taken into account by using second-order closure technique for the subgrid-scale covariance. For the slow reaction case the model results agree with wind tunnel experiments. The calculations reveal that subgrid-scale segregation is important for relatively fast reactions, for example the reaction between NO and O3. Regions of high subgrid-scale segregation are located in the vicinity of the source and near the plume edge. In general, the subgrid contribution to the segregation reduces the mean reaction rate.


Convective Boundary Layer Wind Tunnel Experiment Damkohler Number Reaction Rate Coefficient Wind Tunnel Data 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • J. P. Meeder
    • 1
  • F. T. M. Nieuwstadt
    • 1
  1. 1.J.M. Burgers CentreLaboratory of Aero-and HydrodynamicsDelftThe Netherlands

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