  Theoretical and experimental investigations of water vapor interaction with
porous materials are carried out both at the macro level and at the micro
level. At the macro level, the influence of the arrangement structure of
individual pores on the processes of water vapor interaction with porous
material as a continuous medium is studied. At the micro level, it is very
interesting to investigate the dependence of the characteristics of the water
vapor interaction with porous media on the geometry and dimensions of the
individual pore.
  In this paper, a study was carried out by means of mathematical modelling of
the processes of water vapor interaction with suffering pore of the cylindrical
type. The calculations were performed using a model of a hybrid type combining
a molecular-dynamic and a macro-diffusion approach for describing water vapor
interaction with an individual pore. The processes of evolution to the state of
thermodynamic equilibrium of macroscopic characteristics of the system such as
temperature, density, and pressure, depending on external conditions with
respect to pore, were explored. The dependence of the evolution parameters on
the distribution of the diffusion coefficient in the pore, obtained as a result
of molecular dynamics modelling, is examined. The relevance of these studies is
due to the fact that all methods and programs used for the modelling of the
moisture and heat conductivity are based on the use of transport equations in a
porous material as a continuous medium with known values of the transport
coefficients, which are usually obtained experimentally.
