Thinh T . Kieu
نویسنده
چکیده
I am interested in nonlinear partial differential equations and numerical methods. My work explores equations arising from many different areas of applied sciences such as engineering, fluid mechanics, and biology: especially the generalized Forchheimer equations and hyperbolic equations. In particular, our results on the stability and long time dynamics of solutions can be used to understand nonlinear physical/biological phenomena. I am also focused on proving stability, error estimate, conservation of energy, and convergence of numerical methods. Besides, I am involved in using Bernstein polynomial bases in the finite element method.
منابع مشابه
Thinh T
Generalized Forchheimer equations. The generalized Forchheimer equations are introduced to describe more complex regimes of luid lows in porous media when Darcy's law becomes inadequate. Although widely acknowledged in engineering, the Forchheimer equations still do not have as much mathematical analysis as Darcy's law. This is partly due to the dif iculty lying in their genuine nonlinearity. I...
متن کاملPROPERTIES OF GENERALIZED FORCHHEIMER FLOWS IN POROUS MEDIA By
The nonlinear Forchheimer equations are used to describe the dynamics of fluid flows in porous media when Darcy's law is not applicable. In this article, we consider the generalized Forchheimer flows for slightly compressible fluids and study the initial boundary value problem for the resulting degenerate parabolic equation for pressure with the time-dependent flux boundary condition. We estima...
متن کاملA FAMILY OF STEADY TWO-PHASE GENERALIZED FORCHHEIMER FLOWS AND THEIR LINEAR STABILITY ANALYSIS By
We model multi-dimensional two-phase flows of incompressible fluids in porous media using generalized Forchheimer equations and the capillary pressure. Firstly, we find a family of steady state solutions whose saturation and pressure are radially symmetric and velocities are rotation-invariant. Their properties are investigated based on relations between the capillary pressure, each phase’s rel...
متن کاملFast simplicial quadrature-based finite element operators using Bernstein polynomials
We derive low-complexity matrix-free finite element algorithms for simplicial Bernstein polynomials on simplices. Our techniques, based on a sparse representation of differentiation and special block structure in the matrices evaluating B-form polynomials at warped Gauss points, apply to variable coefficient problems as well as constant coefficient ones, thus extending our results in [14].
متن کاملSymplectic-mixed finite element approximation of linear acoustic wave equations
We apply mixed finite element approximations to the first-order form of the acoustic wave equation. The semidiscrete method exactly conserves the system energy. A fully discrete method employing the symplectic Euler time method in time exactly conserves a positive-definite pertubed energy functional that is equivalent to the actual energy under a CFL condition. In addition to proving optimal-or...
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