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In the current investigation, a computational approach has been implemented on single-phase, incompressible turbulent flow within a 90° bend pipe of a circular cross-section utilizing the k–ε turbulence model. Three bends have the same diameter (D = 0.02 m) and adhere to the same curvature-to-diameter ratio (Rc/D = 1.25). These bends are designed to accommodate working fluid (water) flows at varying Reynolds Numbers (Re = 20,000, 30,000, 50,000, 75,000, 100,000). The study visually represents the velocity fields of both primary and secondary flows, along with the distributions of Turbulent Intensity in various cross-sectional areas. The numerical findings clearly indicate that flow separation is prominently observed in bends with a significant degree of curvature. The velocity vector distributions vividly illustrate the secondary movement caused by fluid transferring from the inner bend to the outer bend, leading to eventual flow detachment.

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Flow Separation Analysis of Single-Phase Turbulent Flow Through Bend Pipe: A Computational Approach

  • 会议论文

  • 发表日期：

    2025年

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  • Sagar Laha,
  • Nitesh Mondal,
  • Santosh Kumar Dash,
  • Prasun Dutta

摘要

In the current investigation, a computational approach has been implemented on single-phase, incompressible turbulent flow within a 90° bend pipe of a circular cross-section utilizing the k–ε turbulence model. Three bends have the same diameter (D = 0.02 m) and adhere to the same curvature-to-diameter ratio (Rc/D = 1.25). These bends are designed to accommodate working fluid (water) flows at varying Reynolds Numbers (Re = 20,000, 30,000, 50,000, 75,000, 100,000). The study visually represents the velocity fields of both primary and secondary flows, along with the distributions of Turbulent Intensity in various cross-sectional areas. The numerical findings clearly indicate that flow separation is prominently observed in bends with a significant degree of curvature. The velocity vector distributions vividly illustrate the secondary movement caused by fluid transferring from the inner bend to the outer bend, leading to eventual flow detachment.