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- 저자 : Lamjed Hadj-Taieb (검색결과 1 건)
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Hierarchical structure parameters in three dimensional turbulence: She-Leveque model
Imtiaz Ahmad,Lamjed Hadj-Taieb,Muzamal Hussain,Mohamed A. Khadimallah,Muhammad Taj,Adil Alshoaibi 국제구조공학회 2022 Smart Structures and Systems, An International Jou Vol.29 No.5
Hierarchical structure parameters, proposed in She-Leveque model, are investigated for velocity components obtained from different flow types over a large range of Reynolds numbers 255 < < 720. The values of intermittency parameter , with respect to a fixed velocity component, are observed nearly same for all four types of turbulence. The parameter , for streamwise velocity components is nearly the same but significantly different for vertical components in different flows. It is also observed that for both parameters, an obvious relation between the longitudinal and transverse components < (and < ) always holds. However, the difference between and is found very small in all types of turbulent flows, we studied here. It is evidenced that at low Reynolds numbers, the deviations from K41 scaling are mainly due to the most intense structures and slightly because of more heterogeneous hierarchy of fluctuation structures. However, at higher Reynolds numbers the deviations seem as a consequence of the most intense structures only. Over all, the study suggests that the hierarchy parameter may be consider as a universal constant.
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