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Drag force and reconfiguration of cultivated Saccharina latissima in current
Name
KelpDrag_final-Liu.pdf
Description
Accepted version
Size
3.54 MB
Format
Adobe PDF
Checksum (MD5)
9e2556b3f6820df19dc54eaff5ed3dfb
Author(s)
Lei, Jiarui
Fan, Dixia
Angera, Andrea
Liu, Yuming
Nepf, Heidi
Date Issued
2021
Journal
Aquacultural Engineering
Publisher
Elsevier BV
Citation
Lei, Jiarui, Fan, Dixia, Angera, Andrea, Liu, Yuming and Nepf, Heidi. 2021. "Drag force and reconfiguration of cultivated Saccharina latissima in current." Aquacultural Engineering, 94.
Version
Author's final manuscript
Abstract
The design of aquaculture systems requires an understanding of the drag forces on cultivated kelp. This study measured the drag on line segments of cultivated Saccharina latissima in a towing tank. The drag on segments of farm line with full kelp bundles and with stipes alone (fronds removed) was measured at tow speeds of 0.10 to 0.50 m/s. The drag on individual fronds cut from the line was also measured. Video images were collected to evaluate the plant reconfiguration. Both kelp blades and stipes contributed to the total drag force on the line bundle. Within the velocity range of our experiments, the kelp blades were essentially horizontal. However, the pronation of kelp stipes increased as flow velocity increased. The reconfiguration of kelp stipes was observed to decrease the vertical extent of the kelp bundle. Due to this reconfiguration, the measured force, , increased with velocity, , at a rate slower than quadratic, and was consistent with scaling laws derived for reconfiguration. Specifically, � ∼ � 21 ! with � = 1.35 ± 0.17.
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
10.1016/J.AQUAENG.2021.102169
