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Weakened energy cascade in elastoinertial turbulence
Physical Review E ( IF 2.2 ) Pub Date : 2021-06-21 , DOI: 10.1103/physreve.103.063108
J J J Gillissen 1
Affiliation  

Newtonian turbulence is characterized by interscale transport of energy from the forcing scales to the dissipation scales. In elastoinertial turbulence, this interscale energy flux is weakened. Here, we explain this phenomenon by numerically showing that elastoinertial energy is predominantly dissipated through polymer chain relaxation. As opposed to Newtonian dissipation, chain relaxation is neither restricted to small nor to large scales but instead it is effective on all the scales. Chain relaxation does not therefore require interscale transport of elastoinertial energy from the forcing scales to the dissipation scales.

中文翻译:

弹性惯性湍流中减弱的能量级联

牛顿湍流的特点是能量从强迫尺度到耗散尺度的跨尺度传输。在弹性惯性湍流中,这种尺度间的能量通量会减弱。在这里,我们通过数值显示弹性惯性能主要通过聚合物链松弛来解释这种现象。与牛顿耗散相反,链松弛既不限于小尺度也不限于大尺度,而是在所有尺度上都有效。因此,链松弛不需要弹性惯性能从强迫尺度到耗散尺度的尺度间传输。
更新日期:2021-06-21
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