Open AccessThermodynamic stability of phases and transition kinetics under adiabatic conditions
Author(s) -
A. Umantsev
Publication year - 1992
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.462883
Subject(s) - adiabatic process , thermodynamics , isothermal process , thermodynamic equilibrium , thermal diffusivity , diffusion , phase transition , thermal equilibrium , thermodynamic state , kinetic energy , equilibrium thermodynamics , stability (learning theory) , chemistry , transition point , boundary value problem , statistical physics , physics , classical mechanics , material properties , machine learning , computer science , quantum mechanics
A study of equilibrium states of a thermodynamic system whose evolution is governed not only by the temperature, but also by the ordering field is carried out. It is found that an adiabatically insulated system may have a new type of nonuniform state of equilibrium which is inhomogeneous in temperature. The comparison is made of the stability conditions in isothermal and adiabatic systems. The steady motion of an interface boundary during a first‐order phase transition is investigated. It is shown, that depending upon the values of the diffusion coefficients, different regimes can exist. For small thermal diffusivity, the temperature of the final phase after the exothermal transition can be above the equilibrium point. The kinetic problem is reformulated to a dynamical system, and a numerical procedure to solve the latter is presented. Numerical results are discussed in comparison with analytic ones.
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