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September 28, 2025Proceedings

Impact of multiple roughness parameters on the turbulent channel flow using direct numerical simulation

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Authors

XZXian ZengYZYang ZhangZXZuoli Xiao

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Overview

Direct numerical simulation reveals complex impacts of roughness parameters on flow, highlighting predictive models.

Key Points

  • Results indicated that roughness height ka influences the roughness function ΔU+, particularly increasing it with ka.
  • A total of 27 rough surfaces were simulated, focusing on roughness height, effective slope, and skewness as key parameters.
  • Analysis utilized direct numerical simulation and a ghost cell immersed boundary method for accurate modeling of flow.
  • The study developed a predictive function for ΔU+ with a mean relative error of 5.0%, showing high reliability in predictions.

Cite This Study

Zeng et al. (2025) studied this question.

synapsesocial.com/papers/68d913b24ddcf71ba560c08fhttps://doi.org/10.33737/gpps25-tc-016
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