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New scaling law for the decay exponent of bimolecular reactions in unbounded transitional flows
KTH, Superseded Departments, Land and Water Resources Engineering.
2003 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 90, no 2Article in journal (Refereed) Published
Abstract [en]

We propose a new scaling law for global kinetics of the stoichiometric reaction A+B-->P in unsteady, transitional flows. We find in the nonlinear flow regime the decay as similar tot(-alpha) where alpha is related to a space-time scaling parameter psi as alphaproportional topsi(m), for the considered parameter range m=0.067. In the linear flow regime, we find that the maximum is alphasimilar or equal to2/3 for psisimilar or equal to1. The proposed scaling law should be useful for linking dynamical subgrid processes with reaction kinetics in a variety of transitional flow systems.

Place, publisher, year, edition, pages
2003. Vol. 90, no 2
Keyword [en]
2-dimensional vortex interactions, contour dynamics, a+b->0 reaction, annihilation, vorticity, kinetics
Identifiers
URN: urn:nbn:se:kth:diva-22182DOI: 10.1103/PhysRevLett.90.028303ISI: 000180444200056OAI: oai:DiVA.org:kth-22182DiVA: diva2:340880
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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