Modeling of dissolving of nano-core-shell particles in two phase viscosity prediction during polymer flooding

Modeling of dissolving of nano-core-shell particles in two phase viscosity prediction during polymer flooding

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Part of #Modeling of dissolving of nano-core-shell particles in two phase viscosity prediction during polymer flooding# :

Publishing year : 2011

Conference : International Conference on Polymer Processing

Number of pages : 4

Abstract: Core-shell particle has been found in many applications in various industries. Hydrophilic nanoparticles and micro particles covered with a nano-layer of hydrophobic polymeric materials can be used in many industries, including enhanced oil recovery techniques. The main purpose of this paper is to model and simulate the dissolution of core and shell layer in a two-phase flow of immiscible fluids. In particular, the governing equations of the process are obtained and numerically solved using a finite difference scheme. The coating solution is considered as diffusion in a spherical coordinate followed by a polymer chain disentanglement through a diffusion boundary layer. Furthermore, a swellable-chain disentanglement model is considered for internal polymer dissolution into a water phase in which the glassy polymer begins to swell due to water penetration and simultaneously changes from the glassy to the rubbery state. Defining proper dimensionless parameters and fixing the moving boundary conditions, the governing equations are discretized using a fully implicit scheme and solved with the Broyden method. The numerical results show that the polymer is dissolving during the polymer flooding. By measuring the viscosity of the polymer solution in relation to the polymer concentration in the laboratory, we calculate the waterfase viscosity increase during the polymer flooding versus time