Horizontal spin of ratchet motor by vertical agitation

Abstract The horizontal spin of a ratchet motor by vertical vibration is reported. A macroscopic ratchet gear is placed on a granular bed, where nearly half of the gear is penetrated in the bed. The gear and granular bed are mechanically vibrated. The gear shows a random motion or one-way spin that...

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Autores principales:	Toshinobu Takahashi, Erika Okita, Daigo Yamamoto, Yasunao Okamoto, Akihisa Shioi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/994e83edb9a14db7a80ea4c2e5edd696
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spelling	oai:doaj.org-article:994e83edb9a14db7a80ea4c2e5edd6962021-12-02T17:47:15ZHorizontal spin of ratchet motor by vertical agitation10.1038/s41598-021-91319-82045-2322https://doaj.org/article/994e83edb9a14db7a80ea4c2e5edd6962021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91319-8https://doaj.org/toc/2045-2322Abstract The horizontal spin of a ratchet motor by vertical vibration is reported. A macroscopic ratchet gear is placed on a granular bed, where nearly half of the gear is penetrated in the bed. The gear and granular bed are mechanically vibrated. The gear shows a random motion or one-way spin that depend on the diameter of the granules, vibration frequency, and degree of vertical motion allowed for the gear. Even when one-way spin is observed, the spin direction depends on the abovementioned factors. Although the dependency is complicated, it is deterministic because the motion or flows of granular matter determines it. The characteristics observed in the experiments are explained by a simple model that accounts for the statistical variance in the motion of the granular matter. Extraction of systematic motion from small and non-useful motions such as mechanical agitation will be developed into energy harvest technology and may facilitate the science of a spontaneously moving system in a uniform potential field.Toshinobu TakahashiErika OkitaDaigo YamamotoYasunao OkamotoAkihisa ShioiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Toshinobu Takahashi Erika Okita Daigo Yamamoto Yasunao Okamoto Akihisa Shioi Horizontal spin of ratchet motor by vertical agitation
description	Abstract The horizontal spin of a ratchet motor by vertical vibration is reported. A macroscopic ratchet gear is placed on a granular bed, where nearly half of the gear is penetrated in the bed. The gear and granular bed are mechanically vibrated. The gear shows a random motion or one-way spin that depend on the diameter of the granules, vibration frequency, and degree of vertical motion allowed for the gear. Even when one-way spin is observed, the spin direction depends on the abovementioned factors. Although the dependency is complicated, it is deterministic because the motion or flows of granular matter determines it. The characteristics observed in the experiments are explained by a simple model that accounts for the statistical variance in the motion of the granular matter. Extraction of systematic motion from small and non-useful motions such as mechanical agitation will be developed into energy harvest technology and may facilitate the science of a spontaneously moving system in a uniform potential field.
format	article
author	Toshinobu Takahashi Erika Okita Daigo Yamamoto Yasunao Okamoto Akihisa Shioi
author_facet	Toshinobu Takahashi Erika Okita Daigo Yamamoto Yasunao Okamoto Akihisa Shioi
author_sort	Toshinobu Takahashi
title	Horizontal spin of ratchet motor by vertical agitation
title_short	Horizontal spin of ratchet motor by vertical agitation
title_full	Horizontal spin of ratchet motor by vertical agitation
title_fullStr	Horizontal spin of ratchet motor by vertical agitation
title_full_unstemmed	Horizontal spin of ratchet motor by vertical agitation
title_sort	horizontal spin of ratchet motor by vertical agitation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/994e83edb9a14db7a80ea4c2e5edd696
work_keys_str_mv	AT toshinobutakahashi horizontalspinofratchetmotorbyverticalagitation AT erikaokita horizontalspinofratchetmotorbyverticalagitation AT daigoyamamoto horizontalspinofratchetmotorbyverticalagitation AT yasunaookamoto horizontalspinofratchetmotorbyverticalagitation AT akihisashioi horizontalspinofratchetmotorbyverticalagitation
_version_	1718379483414659072

Horizontal spin of ratchet motor by vertical agitation

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