Visualisation of hairpin vortex packets in the near-ground atmospheric boundary layer during daytime

Cho, Moonsung

Visualisation of hairpin vortex packets in the near-ground atmospheric boundary layer during daytime

dc.contributor.author	Cho, Moonsung
dc.date.accessioned	2020-05-14T09:30:15Z
dc.date.available	2020-05-14T09:30:15Z
dc.date.issued	2020-01-14
dc.description.abstract	Visualisation of the flow structure near the ground is important to understand aerial locomotion of a passive flying animal. The video shows the visualized structures of several hairpin vortex packets in the near ground atmospheric boundary layer during daytime. The hairpin vortex packets appear as a wedge-like shape. The structure develops upwards, as it drifts in the downwind direction. (Mean wind speed: 1.96 m/s at 0.95 m above the ground) These packet structures can be used by passive flyers, such as spiders, for their aerial dispersal during their take-off phase. The image processing technique has been applied. The faint smokes are recognized by comparing the RGB vectors with that of the background and amplified. The recognized smokes are negatively visualized as the color of white.	en
dc.identifier.uri	https://depositonce.tu-berlin.de/handle/11303/10603
dc.identifier.uri	http://dx.doi.org/10.14279/depositonce-9529
dc.language.iso	en	en
dc.relation.issupplementto	http://dx.doi.org/10.14279/depositonce-9538
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/	en
dc.subject.ddc	551 Geologie, Hydrologie, Meteorologie	de
dc.subject.other	hairpin vortex packet	en
dc.subject.other	atmospheric boundary layer	en
dc.subject.other	coherent structure	en
dc.subject.other	flow visualization	en
dc.subject.other	hairpin vortex	en
dc.subject.other	fiber dynamics	en
dc.subject.other	turbulence	en
dc.subject.other	aerial dispersal	en
dc.subject.other	low Reynolds number flow	en
dc.subject.other	Knudsen number	en
dc.subject.other	atmosphärische Grenzschicht	de
dc.subject.other	kohärente Struktur	de
dc.subject.other	Fadendynamik	de
dc.subject.other	Turbulenz	de
dc.subject.other	Luftverbreitung	de
dc.subject.other	Strömung mit kleiner Reynolds-Zahl	de
dc.subject.other	Knudsen-Zahl	de
dc.title	Visualisation of hairpin vortex packets in the near-ground atmospheric boundary layer during daytime	en
dc.type	Video	en
tub.accessrights.dnb	free	*
tub.affiliation	Fak. 3 Prozesswissenschaften::Inst. Biotechnologie::FG Bioverfahrenstechnik	de
tub.affiliation.faculty	Fak. 3 Prozesswissenschaften	de
tub.affiliation.group	FG Bioverfahrenstechnik	de
tub.affiliation.institute	Inst. Biotechnologie	de

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Description:: Visualization of hairpin vortex packets in the near-ground atmospheric boundary layer during daytime

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