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Sedimentation tanks (ST) are commonly used in stormwater treatment to remove solid particles. This study investigates the efficiency of a rectangular ST by analyzing inlet flow rate, recirculation zones, and residence time's effects on particle removal. Computational fluid dynamics (CFD) is used to evaluate ST efficiency, revealing flow patterns and problem areas. The main objective is to assess the impact of inlet flow rate variations on ST efficiency. CFD software creates a 3D ST model, calibrated with Vermicelli catchment data in southern Italy. Varying the inlet flow rate shows that a plug flow pattern and longer residence time improve ST efficiency. The study underscores the importance of flow patterns and residence time when evaluating rectangular sedimentation tanks for urban stormwater treatment, offering insights for design and operation optimization.

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Numerical Analysis of Sedimentation Tanks Efficiency Using CFD Simulation

  • 会议论文

  • 发表日期：

    2025年

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  • Michele Turco,
  • Anna Chiara Brusco,
  • Salvatore Falco,
  • Seyed Navid Naghib

摘要

Sedimentation tanks (ST) are commonly used in stormwater treatment to remove solid particles. This study investigates the efficiency of a rectangular ST by analyzing inlet flow rate, recirculation zones, and residence time's effects on particle removal. Computational fluid dynamics (CFD) is used to evaluate ST efficiency, revealing flow patterns and problem areas. The main objective is to assess the impact of inlet flow rate variations on ST efficiency. CFD software creates a 3D ST model, calibrated with Vermicelli catchment data in southern Italy. Varying the inlet flow rate shows that a plug flow pattern and longer residence time improve ST efficiency. The study underscores the importance of flow patterns and residence time when evaluating rectangular sedimentation tanks for urban stormwater treatment, offering insights for design and operation optimization.