Autowave Regimes Of Heat And Mass Transfer In
The Non-isothermal Through-reactors
Author(s)
A. M. Brener & L. M. Musabekova
Abstract
The paper deals with autowave processes in non-isothermal reacting diffusion
systems. The mathematical model of heat and mass transfer in a tubular
through-reactor has been submitted. The model consists of the diffusion-kinetic
equations for two reagents under the first-order reversible reaction and heat
transfer equation with allowance for a heat of reaction. Reaction rate constants
for direct and reverse stages are related to temperature according to the
Arrhenius law. The cases of both the adiabatic and non-adiabatic reactor have
been considered. The stationary regimes and conditions of their stability have
been investigated by methods of hydrodynamic stability theory and numerical
experiment. As a result, the simultaneous governing transfer parameters
including thermal, diffusion and kinetic characteristics of both reagents with
allowance for the two reaction stages were detailed. The existence conditions for
dissipate structures which can be identified as running circular cells or wave
fronts have been obtained. Results of the investigations can be applied to
calculating the heat and mass transfer intensity in chemical reactors and heat
exchangers.
1 Introduction
Studies of autowave processes in chemical systems with diffusion are of great
interest for scientists and engineers of different specialties now. The problem to
describe such processes in every details is too complex and far from the
complete solution. At the same time, the dynamics of dissipate structures has
been investigated for isothermal multiphase systems sufficiently well [1–4].
But regularities of generating and propagating autowaves in non-isothermal
systems with chemical reactions accompanied by heat effects have been studied
Keywords
Related Book
Other papers in this volume
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