Wind and Structures

  • 제12권1호
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  • Pages.21-47
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  • 2009
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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Finite element analysis of 2D turbulent flows using the logarithmic form of the κ-ε model

  • 투고 : 2007.05.17
  • 심사 : 2008.11.22
  • 발행 : 2009.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

The logarithmic form for turbulent flow analysis guarantees the positivity of the turbulence variables as ${\kappa}$ and ${\varepsilon}$ of the ${\kappa}-{\varepsilon}$ model by using the natural logarithm of these variables. In the present study, the logarithmic form is incorporated into the finite element solution procedure for the unsteady turbulent flow analysis. A backward facing step flow using the standard ${\kappa}-{\varepsilon}$ model and a flow around a 2D square cylinder using the modified ${\kappa}-{\varepsilon}$ model (the Kato-Launder model) are simulated. These results show that the logarithmic form effectively keeps adequate balance of turbulence variables and makes the analysis stable during transient or unsteady processes.

키워드

참고문헌

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피인용 문헌

  1. Stabilized finite element technique and its application for turbulent flow with high Reynolds number vol.14, pp.5, 2011, https://doi.org/10.12989/was.2011.14.5.465
  2. CFD practical application in conceptual design of a 425 m cable-stayed bridge vol.13, pp.4, 2010, https://doi.org/10.12989/was.2010.13.4.309