The 3-D turbulent flow structure and contaminant distribution in a 45°-bend has been studied in this paper. The Algebraic Stress Model and the Mixing Length Model are used in the fully turbulent region and the ne...The 3-D turbulent flow structure and contaminant distribution in a 45°-bend has been studied in this paper. The Algebraic Stress Model and the Mixing Length Model are used in the fully turbulent region and the near-wall region respectively. The computational results show that the calcutated and experimental longitudinal velocity profiles are in good agreement.Meanwhile, the profiles of velocity, turbulent energry, dissipation rate, Reynolds stresses and contaminant concentration in the bend have been analysed, and the features of the turbulent flow containing contaminat in a 45°-bend have been obtained.展开更多
文摘The 3-D turbulent flow structure and contaminant distribution in a 45°-bend has been studied in this paper. The Algebraic Stress Model and the Mixing Length Model are used in the fully turbulent region and the near-wall region respectively. The computational results show that the calcutated and experimental longitudinal velocity profiles are in good agreement.Meanwhile, the profiles of velocity, turbulent energry, dissipation rate, Reynolds stresses and contaminant concentration in the bend have been analysed, and the features of the turbulent flow containing contaminat in a 45°-bend have been obtained.
