Porosity waves in a fluidized sand-column test

Vardoulakis, I; Stavropoulou, M; Skjaerstein, A

dc.contributor.author	Vardoulakis, I	en
dc.contributor.author	Stavropoulou, M	en
dc.contributor.author	Skjaerstein, A	en
dc.date.accessioned	2014-03-01T01:14:04Z
dc.date.available	2014-03-01T01:14:04Z
dc.date.issued	1998	en
dc.identifier.issn	1364503X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12845
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-3042886004&partnerID=40&md5=fd3429c8a7150c3d627d7d9c1ff1d087	en
dc.relation.uri	http://sisla06.samsi.info/compmod/course/granular/papers/vardoulakis.pdf	en
dc.subject	Fluid flow	en
dc.subject	Fluidized sands	en
dc.subject	Porosity waves	en
dc.subject	Porous media	en
dc.subject.classification	Multidisciplinary Sciences	en
dc.title	Porosity waves in a fluidized sand-column test	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	Fluidized sand-column experiments performed at the IKU provided insight into the mechanism of density adjustment to the conditions of flow against the direction of gravity, and for hydraulic gradients around and past the critical value corresponding to the 'quick' condition. X-ray computer-tomography scan images obtained during these tests show a process which could be described as a kinematic density or porosity-wave motion. Forchheimer's flow law, holding in the post-critical regime, is calibrated by using the storage equation and the data concerning the propagation velocity of the observed porosity waves. Finally, the observed rarefaction waves are simulated mathematically and experimental results are back-analysed.	en
heal.publisher	ROYAL SOC LONDON	en
heal.journalName	Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences	en
dc.identifier.isi	ISI:000077361200009	en
dc.identifier.volume	356	en
dc.identifier.issue	1747	en
dc.identifier.spage	2591	en
dc.identifier.epage	2608	en