Speaker:Dr. Qiujin Peng
Title: Efficient Numerical Methods for Diffusive Interface Model with Peng- Robinson Equation of State
Time:2016-10-20, 16:00-17:00
Venue: Room 316 of Environment Building, Renmin University
Abstract:
My main work centers on modeling and numerical simulation of the complex fluids involved in oil
exploitation practice. The capillary pressure caused by surface tension at the interface between
every two adjacent different phases of the mixture is viewed as the leading force in oil recovery from fractured oil reservoirs. Therefore, the interface between
contiguous phases has become one of the critical mathematical modeling
aspects.After comparison of all related previous mathematical models, the diffuse
interface theory, or the phase field model (we use these two terms interchangeably)
becomes our first choice to model or understand the interface between different
phases of the oil mixture. The Helmholtz free energy provided by the widely used
Peng-Robinson Equation of State (EOS) is selected to derive the further kinetic
equation or the equilibrium equation of the oil system. The kinetic equation is often
second order or fourth-ordersemi-linear parabolic. The equilibrium state is decided
by the Euler-Lagrange(E-L) equations. Proposing appropriate numerical methods to
solve these equations is the key point of our simulation. This report will introduce the previous
achievements of numerical results on these equations and the methods will
be used and investigated in the coming future.