An experimental investigation on the speed of sand flow through a fixed porous bed

Abstract In this study, we document several experiments that investigate the speed of the flow of fine sand through a fixed porous bed of packed glass beads under various conditions, including the height of the sand column (H) and porous bed (h) and the diameter of the glass beads (D) and sand grain...

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Autores principales:	Wanghua Sui, Yankun Liang, Xinjia Zhang, Ravi Jain, Tao Zhu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cbe2d85af03843ac99dffd984fc249ef
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spelling	oai:doaj.org-article:cbe2d85af03843ac99dffd984fc249ef2021-12-02T16:06:25ZAn experimental investigation on the speed of sand flow through a fixed porous bed10.1038/s41598-017-00082-22045-2322https://doaj.org/article/cbe2d85af03843ac99dffd984fc249ef2017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00082-2https://doaj.org/toc/2045-2322Abstract In this study, we document several experiments that investigate the speed of the flow of fine sand through a fixed porous bed of packed glass beads under various conditions, including the height of the sand column (H) and porous bed (h) and the diameter of the glass beads (D) and sand grains (d). The experiments are conducted with glass beads packed at a constant density and sand at a different dry bulk density. The results show that the height of the sand does not affect the speed of the sand flow. The speed of the sand flow (v) decreases with an increase in h until h approaches a certain value. An equation $${\boldsymbol{v}}={\boldsymbol{a}}\sqrt{{\bf{g}}{\boldsymbol{D}}}{\bf{l}}{\bf{n}}(\frac{{\boldsymbol{D}}}{{\boldsymbol{kd}}})$$ v = a g D l n ( D kd ) is proposed, where a and k are the experimentally determined coefficients. Moreover, the flow of sand through a fixed porous bed could be regarded as parallel flow through multiple pipes, and therefore, the relationship between D and the number and diameter of pipes, N and D p, are discussed. Further investigations are needed for the result that the flow of sand through a porous bed or multiple parallel pipes cannot be simplified to flow through one orifice with a certain diameter.Wanghua SuiYankun LiangXinjia ZhangRavi JainTao ZhuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Wanghua Sui Yankun Liang Xinjia Zhang Ravi Jain Tao Zhu An experimental investigation on the speed of sand flow through a fixed porous bed
description	Abstract In this study, we document several experiments that investigate the speed of the flow of fine sand through a fixed porous bed of packed glass beads under various conditions, including the height of the sand column (H) and porous bed (h) and the diameter of the glass beads (D) and sand grains (d). The experiments are conducted with glass beads packed at a constant density and sand at a different dry bulk density. The results show that the height of the sand does not affect the speed of the sand flow. The speed of the sand flow (v) decreases with an increase in h until h approaches a certain value. An equation $${\boldsymbol{v}}={\boldsymbol{a}}\sqrt{{\bf{g}}{\boldsymbol{D}}}{\bf{l}}{\bf{n}}(\frac{{\boldsymbol{D}}}{{\boldsymbol{kd}}})$$ v = a g D l n ( D kd ) is proposed, where a and k are the experimentally determined coefficients. Moreover, the flow of sand through a fixed porous bed could be regarded as parallel flow through multiple pipes, and therefore, the relationship between D and the number and diameter of pipes, N and D p, are discussed. Further investigations are needed for the result that the flow of sand through a porous bed or multiple parallel pipes cannot be simplified to flow through one orifice with a certain diameter.
format	article
author	Wanghua Sui Yankun Liang Xinjia Zhang Ravi Jain Tao Zhu
author_facet	Wanghua Sui Yankun Liang Xinjia Zhang Ravi Jain Tao Zhu
author_sort	Wanghua Sui
title	An experimental investigation on the speed of sand flow through a fixed porous bed
title_short	An experimental investigation on the speed of sand flow through a fixed porous bed
title_full	An experimental investigation on the speed of sand flow through a fixed porous bed
title_fullStr	An experimental investigation on the speed of sand flow through a fixed porous bed
title_full_unstemmed	An experimental investigation on the speed of sand flow through a fixed porous bed
title_sort	experimental investigation on the speed of sand flow through a fixed porous bed
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/cbe2d85af03843ac99dffd984fc249ef
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An experimental investigation on the speed of sand flow through a fixed porous bed

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