Numerical simulations of a second-order chemical reaction in a plane turbulent channel flow

We analyze numerical simulations of a second-order chemical reaction ( Da = 1) in a fully developed turbulent plane channel flow at a low Reynolds number ( Re τ = 180). The reactive plume is formed when a reactant A is released through a line source into the channel flow doped with reactant B. Two d...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2010-09, Vol.53 (19), p.4248-4263
Main Authors: Fabregat, Alexandre, Pallarès, Jordi, Cuesta, Ildefonso, Grau, Francesc X.
Format: Article
Language:English
Subjects:
Channel flow
Chemical reactions
Chemically reactive flows
Computational fluid dynamics
Computer simulation
DNS
Exact sciences and technology
Fluid dynamics
Fluid flow
Fundamental areas of phenomenology (including applications)
Mathematical models
Physics
Reactive, radiative, or nonequilibrium flows
Second-order chemical reaction
Stochastic Fields
Turbulence
Turbulent channel flow
Turbulent flow
Turbulent mass transfer
Turbulent Schmidt number
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Summary:We analyze numerical simulations of a second-order chemical reaction ( Da = 1) in a fully developed turbulent plane channel flow at a low Reynolds number ( Re τ = 180). The reactive plume is formed when a reactant A is released through a line source into the channel flow doped with reactant B. Two different inlet pre-mixing conditions and line source heights are considered. Direct Numerical Simulations (DNS) and Stochastic Fields (SF) methods have been used and compared for these different conditions. The results obtained using SF are sensitive to the particular value of the turbulent Schmidt number ( Sc T ) selected to model the turbulent dispersion. It has been found that if a representative value of Sc T extracted from DNS is used in the SF method, both DNS and SF, give similar results.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2010.05.051