Influence of rheological parameters in all drag reduction regimes of turbulent channel flow with polymer additives |
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| Authors: | LI Chang-feng ZHAO Zuo-guang WU Gui-fen FENG Xiao-dong |
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| Affiliation: | LI Chang-feng,ZHAO Zuo-guang,WU Gui-fen,FENG Xiao-dong(School of Energy , Power Engineering,Jiangsu University,Zhenjiang 212013,China) |
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| Abstract: | The influence of rheological parameters on vortex dynamics and the extent of drag reduction(DR) were deciphered via extensively analyzing the hi-fidelity direct numerical simulation results of the turbulent channel flow with polymer solutions.It has been observed that in all drag reduction regimes from the onset of DR to maximum drag reduction(MDR) limit,the Deborah number is defined as the product of an effective Weissenberg number,and the root mean square streamwise vorticity fluctuation remains O(1) in t... |
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| Keywords: | drag reduction dilute polymeric solutions turbulent channel flows FENE-P model |
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