Computer simulation of fluid flow in fractured media. Effect of thermal dispersion

Kei Yoshida, Ayumu Shimizu, Sergei Fomin, Toshiyuki Hashida

Research output: Contribution to journalConference articlepeer-review

Abstract

The numerical model FRACSIM developed by the research group in Tohoku University is proved to be an appropriate approximate model of the hot-dry-rock geothermal reservoir capable to address simultaneously the problems associated with hydraulic stimulation, fluid circulation and heat extraction. The structure of the fractured rock is approximated with the network model of fractal geometry. The adopted procedure makes possible to characterize the geothermal reservoirs by parameters measured from the field data. In the present study an improved mathematical model, which accounts for the effect of thermal dispersion on forced convection during the geothermal energy extraction, is proposed. Since the typical flow rate in the fractured reservoir is relatively high, the values of the effective thermal conductivities in the longitudinal and transverse directions are taken to be directly proportional to the values of the fluid velocity. The importance of the thermal dispersion factor for assessment of the total thermal output of the geothermal reservoir is proved.

Original languageEnglish
Pages (from-to)207-215
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5127
DOIs
Publication statusPublished - 2002 Dec 1
EventSixth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering - St. Petersburg, Russian Federation
Duration: 2002 Jun 102002 Jun 16

Keywords

  • Fluid
  • Fractal
  • Fracture
  • Geothermal reservoir
  • Simulation
  • Thermal dissipation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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