Journal of Mechanical Science and Technology

, Volume 21, Issue 2, pp 360–371 | Cite as

Numerical analysis of turbulent flow and heat transfer in a square sectioned U-bend duct by elliptic-blending second moment closure

  • Jong-Keun Shin
  • Young-Don Choi
  • Jeong-Soo An


A second moment turbulence closure using the elliptic-blending equation is introduced to analyze the turbulence and heat transfer in a square sectioned U-bend duct flow. The turbulent heat flux model based on the elliptic concept satisfies the near-wall balance between viscous diffusion, viscous dissipation and temperature-pressure gradient correlation, and also has the characteristics of approaching its respective conventional high Reynolds number model far away from the wall. Also, the traditional GGDH heat flux model is compared with the present elliptic concept-based heat flux model. The turbulent heat flux models are closely linked to the ellipticblending second moment closure which is used for the prediction of Reynolds stresses. The predicted results show their reasonable agreement with experimental data for a square sectioned U-bend duct flow field adopted in the present study.

Key Words

Second Moment Closure Square Sectioned U-bend Duct Flow Secondary Flow Elliptic-Blending Model Turbulent Heat Transfer 


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Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2007

Authors and Affiliations

  1. 1.Department of Automotive EngineeringHanzhong UniversityKangwondoKorea
  2. 2.Department of Mechanical EngineeringKorea UniversitySeoulKorea

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