multilength scale
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2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michael Joon Seng Goh ◽  
Yeong Shiong Chiew ◽  
Ji Jinn Foo

AbstractA net immersed in fractal-induced turbulence exhibit a transient time-varying deformation. The anisotropic, inhomogeneous square fractal grid (SFG) generated flow interacts with the flexible net to manifest as visible cross-sectional undulations. We hypothesize that the net’s response may provide a surrogate in expressing local turbulent strength. This is analysed as root-mean-squared velocity fluctuations in the net, displaying intensity patterns dependent on the grid conformation and grid-net separation. The net’s fluctuation strength is found to increase closer to the turbulator with higher thickness ratio while presenting stronger fluctuations compared to regular-square-grid (RSG) of equivalent blockage-ratio, σ. Our findings demonstrate a novel application where 3D-reconstruction of submerged nets is used to experimentally contrast the turbulence generated by RSG and multilength scale SFGs across the channel cross-section. The net’s response shows the unique turbulence developed from SFGs can induce 9 × higher average excitation to a net when compared against RSG of similar σ.


Author(s):  
Ramona B. J. Ihlenburg ◽  
Tobias Mai ◽  
Andreas F. Thünemann ◽  
Ruth Baerenwald ◽  
Kay Saalwächter ◽  
...  

2019 ◽  
Vol 31 (12) ◽  
pp. 1807842 ◽  
Author(s):  
Ke Gao ◽  
Sae Byeok Jo ◽  
Xueliang Shi ◽  
Li Nian ◽  
Ming Zhang ◽  
...  

2017 ◽  
Vol 9 (33) ◽  
pp. 27664-27675 ◽  
Author(s):  
Vadim Dargel ◽  
Nicolas Jäckel ◽  
Netanel Shpigel ◽  
Sergey Sigalov ◽  
Mikhael D. Levi ◽  
...  
Keyword(s):  

2017 ◽  
Vol 27 (33) ◽  
pp. 1702016 ◽  
Author(s):  
Long Ye ◽  
Yuan Xiong ◽  
Sunsun Li ◽  
Masoud Ghasemi ◽  
Nrup Balar ◽  
...  

ACS Nano ◽  
2016 ◽  
Vol 10 (5) ◽  
pp. 4926-4941 ◽  
Author(s):  
Markus Leitgeb ◽  
Dieter Nees ◽  
Stephan Ruttloff ◽  
Ursula Palfinger ◽  
Johannes Götz ◽  
...  

2015 ◽  
Vol 119 (31) ◽  
pp. 17552-17560 ◽  
Author(s):  
Haibo Huang ◽  
Yun Wang ◽  
Chen Zou ◽  
Jiawei Tao ◽  
Dan Qu ◽  
...  

2012 ◽  
Vol 45 (13) ◽  
pp. 5620-5620 ◽  
Author(s):  
Jingjing Yang ◽  
Yongri Liang ◽  
Jun Luo ◽  
Chuanzhuang Zhao ◽  
Charles C. Han

2012 ◽  
Vol 45 (10) ◽  
pp. 4254-4261 ◽  
Author(s):  
Jingjing Yang ◽  
Yongri Liang ◽  
Jun Luo ◽  
Chuanzhuang Zhao ◽  
Charles C. Han

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