A Method for 3D Reconstruction of Net Undulation for Fluid Structure Interaction of Fractal Induced Turbulence

Goh, Michael Joon Seng; Chiew, Yeong Shiong; Foo, Ji Jinn

doi:10.1109/jsen.2020.2987643

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…The net was reconstructed using Neighbourhood Occupancy (NOCC) keypoints with Propagative Stereomatching 19 for the first frame of the recording. Local DIC 21 was then applied to obtain a point cloud of the net at each frame.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the mathematical solutions for fiber and membrane dynamics in flow 18 indicate a possibility of obtaining fluid flow perturbation from a fiber or membrane, in which case we decide to use a flexible net as the probing sheet. The first step on this journey will be the study of the probing sheet’s response to the flow dynamic which is recently made possible using videogrammetry 19 .…”

Section: Introductionmentioning

confidence: 99%

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Fractal-induced 2D flexible net undulation

Goh

Chiew

Foo

2021

Sci Rep

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A 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.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fractal-induced 2D flexible net undulation

Goh

Chiew

Foo

2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…These outliers are inevitable by‐products due to various factors such as human error, surface reflectivity, surface roughness, complex shape, material properties, environmental noise as well as instrumental errors [7, 8]. We are particularly interested in the application of outlier removal to a newly introduced study where a net immersed in fractal‐generated turbulence is reconstructed in 3D for further understanding of fluid‐structure interaction [9]. The accurate removal of an outlier in the reconstruction process is important in this application to characterise the net‐turbulence interaction from both local and global scale.…”

Section: Introductionmentioning

confidence: 99%