Normal-Velocity Relaxation and Higher Order Algebraic Heat Flux Models Applicable to an Axisymmetric Impinging Jet

作者：Bazdidi Tehrani Farzad^*; Imanifar Alireza; Khajehhasani Siavash; Rajabi Zargarabadi Mehran

来源：Journal of Dispersion Science and Technology, 2012, 33(4): 556-564.

DOI：10.1080/01932691.2011.574944

• Algebraic turbulent heat flux modeling
• axisymmetric impinging jet
• local nusselt number
• normal-velocity relaxation turbulence model

The present article encompasses an effort on the prediction of flow and heat transfer characteristics in the turbulent axisymmetric impinging jet. This is achieved by applying the realizability constraint in the normal-velocity relaxation (v(2) - f) model and algebraic turbulent heat flux models to flow and thermal fields, respectively. The realizable v(2) - f model is capable of improving the predicted velocity and Reynolds stress and consequently the local Nusselt number as compared with the available experimental data. Applying the higher order algebraic turbulent heat flux models, namely, GGDH and HOGGDH results in a larger wall jet heat diffusion. This causes an improvement in the predicted local Nusselt number through its reduction in both the stagnation and wall jet regions. For the local Nusselt number prediction, the realizable v(2) - f model in combination with HOGGDH model is shown to be in reasonably good agreement with the available experimental data. This is also regarded as an overall progress compared with the results reported by other workers.

• 出版日期2012