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Permeameter data verify new turbulence process for MODFLOW.

Eve L Kuniansky1, Keith J Halford, W Barclay Shoemaker

  • 1U.S. Geological Survey, Norcross, GA 30092, USA.

Ground Water
|May 8, 2008
PubMed
Summary
This summary is machine-generated.

Turbulent flow in Key Largo Limestone was simulated using the Conduit Flow Process (CFP) in MODFLOW-2005. This approach accurately models the nonlinear relationship between hydraulic gradient and discharge in porous media.

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Area of Science:

  • Hydrogeology
  • Geotechnical Engineering
  • Computational Fluid Dynamics

Background:

  • Key Largo Limestone exhibits complex flow behavior.
  • Turbulent flow in porous media is challenging to model.
  • Previous studies reported nonlinear flow in limestone samples.

Purpose of the Study:

  • To simulate turbulent flow in Key Largo Limestone using MODFLOW-2005.
  • To validate the Conduit Flow Process (CFP) for simulating nonlinear flow.
  • To assess the impact of turbulent flow on head distributions and flux.

Main Methods:

  • Permeameter experiments on a 0.2 m cubic limestone sample.
  • Application of the turbulent flow approximation in MODFLOW-2005, mode 2 (CFPM2).
  • Simulation of the nonlinear relationship between hydraulic gradient and discharge.

Main Results:

  • The simulation accurately reproduced the experimental data.
  • Good agreement was found between simulated and observed nonlinear flow behavior.
  • The CFPM2 module effectively captured turbulent flow effects.

Conclusions:

  • The Conduit Flow Process in MODFLOW-2005 is a useful tool for simulating turbulent flow in porous media.
  • The approach accurately predicts head distributions and flux under turbulent conditions.
  • This method enhances the understanding of groundwater flow in karst environments.