Computer simulation of fluid flow in fractured media: effect of thermal dispersion

Kei Yoshida; Ayumu Shimizu; Sergei Fomin; Toshiyuki Hashida

doi:10.1117/12.517976

10 October 2003 Computer simulation of fluid flow in fractured media: effect of thermal dispersion

Kei Yoshida, Ayumu Shimizu, Sergei Fomin, Toshiyuki Hashida

Proceedings Volume 5127, Sixth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering; (2003) https://doi.org/10.1117/12.517976
Event: Sixth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, 2002, St. Petersburg, Russian Federation

Abstract

The numerical model FRACSIM developed by the research group in Tohoku University is proven 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 proven.

Citation Download Citation

Kei Yoshida, Ayumu Shimizu, Sergei Fomin, and Toshiyuki Hashida "Computer simulation of fluid flow in fractured media: effect of thermal dispersion", Proc. SPIE 5127, Sixth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, (10 October 2003); https://doi.org/10.1117/12.517976

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