Phase transitions in porous media studied by NMR spectroscopy
نویسنده
چکیده
منابع مشابه
Comparison of Thermal Dispersion Effects for Single and two Phase Analysis of Heat Transfer in Porous Media
The present work involves numerical simulation of a steady, incompressible forcedconvection fluid flow through a matrix of porous media between two parallel plates at constanttemperature. A Darcy model for the momentum equation was employed. The mathematical model forenergy transport was based on single phase equation model which assumes local thermal equilibriumbetween fluid and solid phases. ...
متن کاملGas-liquid Relative Permeability Estimation in 2D Porous Media by Lattice Boltzmann Method: Low Viscosity Ratio 2D LBM Relative Permeability
This work is a primary achievement in studying the CO2 and N2–oil systems. To predict gas-liquid relative permeability curves, a Shan-Chen type multicomponent multiphase lattice Boltzmann model for two-phase flow through 2D porous media is developed. Periodic and bounce back boundary conditions are applied to the model with the Guo scheme for the external body force (i.e.,...
متن کاملSharp Interface Limit of a Homogenized Phase Field Model for Phase Transitions in Porous Media
A homogenized phase field model for phase transitions in porous media is considered. By making use of the method of formal asymptotic expansion with respect to the interface thickness, a sharp interface limit problem is derived. This limit problem turns out to be similar to the classical Stefan problem with surface tension and kinetic undercooling.
متن کاملDiffusion in Porous Media
Porous media are of considerable interest in a very diverse range of activities. They comprise a wide variety of substances—plastics, ceramics, cements, clays, rocks, porous glasses, carbons, silica gels, zeolites, the recently emerging metal–organic frameworks and coordination polymers, and many more. Even biological tissues may share many features of porous media. Depending on the given natur...
متن کاملMobility changes of side chains ascribed to density modulations along columnar structures detected by 2D NMR
The molecular dynamics and phase transitions of a columnar liquid crystal based on hexaether-substituted rufigallol mesogens were studied by a combination of X-ray scattering as well as ID and 2D solid-state NMR spectroscopy. A correlation of the anisotropic molecular moIion, with the molecular symmetry and the phase symmetry was established. 2D-exchange
متن کامل