Encontrados 6 documentos, a visualizar página 1 de 1
Influence of reaction heat on time dependent processes in a chemically reacting...
Marques Júnior, Wilson; Kremer, Gilberto M.; Soares, A. J.In this paper we study time dependent problems, like the propagation of sound waves or the behavior of small local wave disturbances induced by spontaneous internal fluctuations, in a binary mixture undergoing a chemical reaction of type A+A= B+B. The study is developed at the hydrodynamic Euler level, in a chemical regime of fast reactive process in which the chemical reaction is close to its final equilibrium...
A kinetic model for chemical reactions without barriers : transport coefficient...
Alves, Giselle M.; Marques Júnior, Wilson; Soares, A. J.; Kremer, Gilberto M.The kinetic model of the Boltzmann equation proposed in the work of Kremer and Soares 2009 for a binary mixture undergoing chemical reactions of symmetric type which occur without activation energy is revisited here, with the aim of investigating in detail the transport properties of the reactive mixture and the influence of the reaction process on the transport coefficients. Accordingly, the non-equilibrium so...
Transport properties of a kinetic model for chemical reactions without barriers
Alves, Giselle M.; Kremer, Gilberto M.; Soares, A. J.A kinetic model of the Boltzmann equation for chemical reactions without energy barrier is considered here with the aim of evaluating the reaction rate and characterizing the transport coefficient of shear viscosity for the reactive system. The Chapman-Enskog solution of the Boltzmann equation is used to compute the chemical reaction effects, in a flow regime for which the reaction process is close to the final...
Spectral distribution of scattered light from a chemical relaxation system
Marques Júnior, Wilson; Kremer, Gilberto M.; Bianchi, M. Pandolfi; Soares, A. J.The aim of this work is to describe the light scattering spectra of a quaternary reacting gas mixture from the macroscopic field equations derived from the kinetic BGK-type model proposed by the authors in a previous paper. The study is developed in a hydrodynamic regime for which the system of the field equations of constituent number densities, momentum and temperature of the mixture is closed by the constitu...
From the transport coefficients of a relaxation kinetic model to harmonic wave ...
Kremer, Gilberto M.; Bianchi, M. Pandolfi; Soares, A. J.Special issue - International Conference on Transport Theory 2009 ; For a gas system of four constituents which experiences the bimolecular chemical reaction A1+A2=A3+A4, and in a regime close to the chemical equilibrium, the BGK-type model proposed by the authors in a previous paper is here considered with the aim of studying plane harmonic wave solutions to the system of the reactive field equations. The ...
H-theorem and trend to equilibrium of chemically reacting mixture of gases
Kremer, Gilberto M.; Oliveira, Filipe; Soares, A. J.The trend to equilibrium of a quaternary mixture of monatomic gases undergoing a reversible reaction of bimolecular type is studied in a quite rigorous mathematical picture within the framework of Boltzmann equation extended to chemically reacting mixture of gases. The H-theorem and entropy inequality allow to prove two main results under the assumption of uniformly boundedness and equicontinuity of the ...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||