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August 1, 2025Physics of Fluids

Scaling law in turbulent channel flows with multiple roughness parameters

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Authors

XZXian ZengYZY. ZhangJCJiahuan Cui

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Overview

Simulation reveals surface roughness influences channel flow behavior, indicating new predictive methods for turbulence effects.

Key Points

  • Surface roughness characteristics significantly impact turbulent channel flows, influencing flow patterns and stress levels.
  • Key metrics of roughness height, effective slope, and skewness were identified, leading to distinct simulations under specific conditions.
  • Direct numerical simulations combined with an immersed boundary method provided insights into the behavior of various rough surfaces.
  • A predictive model emerged from these findings, demonstrating high accuracy with a mean relative error of 5.0% across the analyzed parameters.

Cite This Study

Zeng et al. (2025) studied this question.

synapsesocial.com/papers/68af5f13ad7bf08b1eae1da3https://doi.org/10.1063/5.0284747
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