title: New scaling law for the decay exponent of bimolecular reactions in unbounded transitional flows.
abstract: 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 approximately t(-alpha) where alpha is related to a space-time scaling parameter psi as alpha proportional, variant psi(m), for the considered parameter range m=0.067. In the linear flow regime, we find that the maximum is alpha approximately 2/3 for psi approximately 1. The proposed scaling law should be useful for linking dynamical subgrid processes with reaction kinetics in a variety of transitional flow systems.
authors.affiliation: Royal Institute of Technology, 100 44 Stockholm, Sweden. rogberg@kth.se
authors.forename: P
authors.initials: P
authors.lastname: Rogberg
authors.forename: V
authors.initials: V
authors.lastname: Cvetkovic
mesh_terms: D001671:Biochemistry / Q000379:methods*; D007700:Kinetics; D008956:Models, Chemical