Simulation of Front Instabilities in Density-Driven Flow, Using a Reactive Transport Model for Biogrout Combined with a Randomly Distributed Permeability Field

W. K. van Wijngaarden, L. A. van Paassen, F. J. Vermolen, G. A.M. van Meurs, C. Vuik

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Biogrout is a method to strengthen granular soil, which is based on microbial-induced carbonate precipitation. To model the Biogrout process, a reactive transport model is used. Since high flow rates are undesirable for the Biogrout process, the model equations can be solved with a standard Galerkin finite element method. The Biogrout process involves the injection of dense fluids in the subsurface. In this paper, we present our reactive transport model for Biogrout and use it to simulate an experiment in which a pulse of a dense fluid is injected in a porous medium filled with water. In this experiment, front instabilities were observed in the form of fingers. The numerical simulations showed that the fingering phenomenon was less pronounced than in the experiment. By reducing the dispersion length and implementing a randomly distributed permeability field, the fingering phenomenon could be induced. Furthermore, the results of a case study to a Biogrout application are reported.

Original languageEnglish (US)
Pages (from-to)333-359
Number of pages27
JournalTransport in Porous Media
Volume112
Issue number2
DOIs
StatePublished - Mar 1 2016
Externally publishedYes

Keywords

  • Biogrout
  • Fingering
  • Microbial-induced carbonate precipitation (MICP)
  • Numerical simulation
  • Randomly distributed permeability field

ASJC Scopus subject areas

  • Catalysis
  • Chemical Engineering(all)

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