EVALUATION OF TURBULENCE MODELS IN PREDICTING TURBULENCE INFLUENCE FROM FLOW FIELD TO BOUNDARY LAYER

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SHAFAHI M.; KAHROM M.

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Paper Information

Journal: JOURNAL OF AEROSPACE SCIENCE AND RESEARCH Year:2009 | Volume:2 | Issue:3 Page(s): 63-72

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Title

EVALUATION OF TURBULENCE MODELS IN PREDICTING TURBULENCE INFLUENCE FROM FLOW FIELD TO BOUNDARY LAYER

Author(s)

SHAFAHI M. | KAHROM M. | Issue Writer Certificate

Keywords

FREE STREAM TURBULENCE (FST)Q3

TURBULENCE MODELQ3

TRANSITIONQ3

SKIN FRICTIONQ3

Abstract

Turbulence models have long been developed and examined for their accuracy and stability in variety of environments. While many flows work with excited turbulence intensity, models have rarely been tested to explore whether their accuracy withstands with augmented free stream turbulence intensity or decline in reasonable solutions. In present study the turbulent intensity of the air, moving parallel to a flat plate is increased from 0.4 to 6.6% for the whole flow, downstream to the screen. Three popular TURBULENCE MODELs are examined by investigating the turbulence penetration into flow field as well as into turbulent boundary layers over the flat plate. Results of numerical solutions for Standard k-e, Realizable k-e and finally two equations Shear Stress Transport k-w model are compared to experimental measurements and results are discussed. Results of variation of free stream turbulence intensity from flow field out of boundary layer, in addition, streamwise mean velocity, streamwise rms velocity and SKIN FRICTION coefficient from boundary layer are investigated. Conclusion is made that despite restrictions of these turbulent models specially in predicting flow near a turbulent/non-turbulent interface, they have acceptable performance in both low and high intensity turbulent flows.

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APA: Copy

SHAFAHI, M., & KAHROM, M.. (2009). EVALUATION OF TURBULENCE MODELS IN PREDICTING TURBULENCE INFLUENCE FROM FLOW FIELD TO BOUNDARY LAYER. JOURNAL OF AEROSPACE SCIENCE AND RESEARCH, 2(3), 63-72. SID. https://sid.ir/paper/199482/en

Vancouver: Copy

SHAFAHI M., KAHROM M.. EVALUATION OF TURBULENCE MODELS IN PREDICTING TURBULENCE INFLUENCE FROM FLOW FIELD TO BOUNDARY LAYER. JOURNAL OF AEROSPACE SCIENCE AND RESEARCH[Internet]. 2009;2(3):63-72. Available from: https://sid.ir/paper/199482/en

IEEE: Copy

M. SHAFAHI, and M. KAHROM, “EVALUATION OF TURBULENCE MODELS IN PREDICTING TURBULENCE INFLUENCE FROM FLOW FIELD TO BOUNDARY LAYER,” JOURNAL OF AEROSPACE SCIENCE AND RESEARCH, vol. 2, no. 3, pp. 63–72, 2009, [Online]. Available: https://sid.ir/paper/199482/en

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