Compositional modeling by the combined discontinuous Galerkin and mixed methods

Hussein Hoteit, A. Firoozabadi

Research output: Contribution to conferencePaperpeer-review

4 Scopus citations

Abstract

In this work, we present a new numerical procedure that combines the mixed finite element (MFE) and the discontinuous Galerkin (DG) methods. This numerical scheme is used to solve the highly nonlinear coupled equations that describe the flow processes in homogeneous and heterogeneous media with mass transfer between the phases. The MFE method is used to approximate the phase velocity based on the pressure (more precisely average pressure) at the interface between the nodes. This approach conserves the mass locally at the element level and guarantees the continuity of the total flux across the interfaces. The DG method is used to solve the flow equations which are generally convection dominated. The DG method associated with suitable slope limiters can capture sharp gradients in the solution without creating spurious oscillations. We present several numerical examples in homogeneous and heterogeneous media that demonstrate the superiority of our method to the finite difference (FD) approach. Our proposed MFE-DG method becomes orders of magnitude faster than the FD method for a desired accuracy in 2D.

Original languageEnglish (US)
Pages2093-2106
Number of pages14
StatePublished - Dec 1 2004
Event2004 SPE Annual Technical Conference and Exhibition - Houston, TX, United States
Duration: Sep 26 2004Sep 29 2004

Other

Other2004 SPE Annual Technical Conference and Exhibition
CountryUnited States
CityHouston, TX
Period09/26/0409/29/04

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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