Linearized cosimulation of hydraulic conductivity, pressure head, and flux in saturated and unsaturated, heterogeneous porous media

Thomas Harter, Allan L. Gutjahr, Tian-Chyi J Yeh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An efficient cosimulator is developed for generating both random hydraulic property fields and related flow regimes under either saturated or unsaturated conditions. This cosimulator combines a spectral random field generator, based on the Fast Fourier Transform technique, and first-order perturbation/spectral solutions for flow in saturated and unsaturated porous media. Owing to the first-order approximation of the simulator, flow regimes in several geological media with different variabilities are simulated to investigate the accuracy of the simulator. For mild and moderately heterogeneous geological media, the simulator is found to be very accurate in terms of pressure head field and flux distributions. In addition, the execution time of the simulator is substantially smaller than that of any classical numerical simulator. However, the accuracy of the simulator deteriorates as the geological medium becomes highly heterogeneous.

Original languageEnglish (US)
Pages (from-to)169-190
Number of pages22
JournalJournal of Hydrology
Volume183
Issue number1-2
StatePublished - Aug 1996

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porous media
hydraulic conductivity
simulator
porous medium
unsaturated conditions
saturated flow
saturated conditions
unsaturated flow
fluid mechanics
hydraulic property
Fourier transform
methodology
perturbation

ASJC Scopus subject areas

  • Soil Science
  • Earth-Surface Processes

Cite this

Linearized cosimulation of hydraulic conductivity, pressure head, and flux in saturated and unsaturated, heterogeneous porous media. / Harter, Thomas; Gutjahr, Allan L.; Yeh, Tian-Chyi J.

In: Journal of Hydrology, Vol. 183, No. 1-2, 08.1996, p. 169-190.

Research output: Contribution to journalArticle

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