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January 22, 2026Physics of Fluids

Influence of various roughness elements on nonlinear flow characteristics in fractures based on the lattice Boltzmann method

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Authors

JMJiacheng MaGZGaofeng ZhuCWChuang Wei

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Overview

Numerical simulations reveal how surface roughness affects nonlinear fluid flow in fractures, indicating potential engineering applications.

Key Points

  • This research aims to understand how different roughness geometries influence nonlinear fluid flow in rock fractures.
  • Utilized the lattice Boltzmann method for numerical simulations.
  • Investigated flow characteristics across Reynolds numbers from 50 to 200.
  • Examined various roughness geometries: rectangular, semicircular, and triangular.
  • Analyzed effects of different relative roughness ratios (b/H from 0.2 to 0.6).
  • Proposed a shape-dependent Forchheimer seepage model and a drag coefficient model.
  • Rectangular roughness elements caused the most obstruction and energy loss.
  • Triangular elements produced smoother streamlines and reduced drag.
  • Semicircular elements balanced viscous and inertial effects.
  • Developed models explicitly account for geometric effects in predicting hydraulic performance.

Cite This Study

Ma et al. (2026) studied this question.

synapsesocial.com/papers/6971bd26642b1836717e1d19https://doi.org/10.1063/5.0309466
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