Control of reactant flow at the boundary: Its effect on the onset of nonequilibrium macroscopic structures in chemical reactions

Izús, G. G.; Ramírez, O.; Deza, R. R.; Wio, H. S.
December 1996
Journal of Chemical Physics;12/15/1996, Vol. 105 Issue 23, p10424
Academic Journal
In a one-dimensional, two-component excitable chemical model system (the ‘‘Brusselator’’) we investigate the effects of controlling the flow of reactants at the boundary, on the stability of the thermodynamical branch. The reflectivity of the boundary adjusts the external flux and acts as a control parameter, capable of enhancing or weakening the self-organizing processes leading to the appearance of temporal or spatial patterns. © 1996 American Institute of Physics.


Related Articles

  • Ab initio, kinetics, and dynamics study of Cl+CH[sub 4]→HCl+CH[sub 3]. Troya, Diego; Milla´n, Judith; Ban˜os, Irene; Gonza´lez, Miguel // Journal of Chemical Physics;9/22/2002, Vol. 117 Issue 12, p5730 

    The Cl+ CH[sub 4] → HCI + CH[sub 3] reaction has been studied using different levels of the chemical reaction theory. Ab initio calculations at the fourth-order Møller-Plesset perturbation theory//second-order Møller-Plesset perturbation theory level, employing the 6-311G(2df,2pd)...

  • Modes selection in polymer mixtures undergoing phase separation by photochemical reactions. Tran-Cong, Qui; Kawai, Junji; Endoh, Kouichi // Chaos;Jun99, Vol. 9 Issue 2, p298 

    Investigates the phase separation kinetics and morphology of binary polymer mixtures in the presence of photochemical reactions by using phase-contrast optical microscopy combined with digital image analysis. Theoretical background of phase separation in binary polymer mixtures; Characteristics...

  • Convective regimes in reactive fluid media due to the interaction with catalytic surfaces. Viljoen, Hendrik J.; Gatica, Jorge E.; Hlavacek, Vladimir // Physics of Fluids A;Feb89, Vol. 1 Issue 2, p274 

    Reactive fluid media enclosed in a cavity with a catalytic surface are analyzed. Nonisothermal chemical reactions on this surface can lead to convective instabilities. A simplified model is developed by using a low-order truncation of a Fourier-type expansion and employing the Galerkin method. A...

  • Some additional information on the dynamics of the reaction O+2+CH4. Böhringer, H.; Arnold, F. // Journal of Chemical Physics;2/15/1986, Vol. 84 Issue 4, p2097 

    The reaction O+2+CH4 was studied in a selected-ion drift tube in a He buffer at various temperatures. At sufficiently high buffer pressure the reaction product O+2 · CH4 was observed beside the well known third order kinetics. From a study of the reaction equilibrium O+2 · O2+CH4 · O+2...

  • On the Reactions A + A + … + A → 0 at a One-Dimensional Periodic Lattice of Catalytic Centers: Exact Solution. Naidenov, A. A.; Nechaev, S. K. // JETP Letters;7/10/2002, Vol. 76 Issue 1, p61 

    The kinetics of the diffusion-controlled chemical reactions A + A + … + A → 0 that occur at catalytic centers periodically arranged along a straight line is considered. Modes of the behavior of reaction probability W(t) were studied at different times and different densities of the...

  • A kinetic study of the interaction of gaseous H(D) atoms with D(H) adsorbed on Ni(100) surfaces. Kammler, Th.; Lee, J.; Kuppers, J. // Journal of Chemical Physics;5/1/1997, Vol. 106 Issue 17, p7362 

    Reports on a kinetic study of the interaction of gaseous hydrogen atoms with absorbed on nickel surfaces. Time dependent reaction rates in partial pressure units; Flux and temperature dependence; Sequence of rate curve segments.

  • Ultralow temperature kinetics of neutral–neutral reactions. The technique and results for the reactions CN+O2 down to 13 K and CN+NH3 down to 25 K. Sims, I. R.; Queffelec, J.-L.; Defrance, A.; Rebrion-Rowe, C.; Travers, D.; Bocherel, P.; Rowe, B. R.; Smith, I. W. M. // Journal of Chemical Physics;3/15/1994, Vol. 100 Issue 6, p4229 

    An entirely new experimental method is described which enables the rate constants of neutral–neutral gas-phase reactions to be measured at ultralow temperatures. The measurements are made by applying the pulsed laser photolysis (PLP), laser-induced fluorescence (LIF) technique of studying...

  • What can be stated by the Glansdorff-Prigogine criterion concerning the stability of mass-action... Wilhelm, Thomas; Hanggi, Peter // Journal of Chemical Physics;4/1/1999, Vol. 110 Issue 13, p6128 

    Investigates which general results concerning the local stability of steady states of arbitrary chemical reaction networks can be deduced with the Glansdorff-Prigogine stability criterion. Thermodynamic stability analysis of arbitrary mass-action kinetic reaction networks; Mass-action kinetic...

  • An ab initio molecular dynamics study of the S[sub N]2 reaction... Raugei, Simone; Cardini, Gianni // Journal of Chemical Physics;12/22/1999, Vol. 111 Issue 24, p10887 

    Describes an ab initio molecular dynamics study of the S[sub N]2 reaction Cl[sup -]CH[sub 3]Br...CH[sub 3]Cl+Br[sup -]. Potential energy and free energy profiles determined along the reaction coordinate; Analysis of the structural parameters along the reaction pathway; Results of impact studies.

  • Forward-backward initial value representation for the calculation of thermal rate constants for reactions in complex molecular systems. Wang, Haobin; Haobin Wang; Thoss, Michael; Miller, William H. // Journal of Chemical Physics;1/1/2000, Vol. 112 Issue 1 

    The semiclassical (SC) initial value representation (IVR) provides a potentially practical way for including quantum effects into classical molecular dynamics simulations. The forward-backward (FB) version of the IVR provides an especially attractive way for calculating time correlation...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics