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Measurement of granular flow in a silo using digital speckle radiography
University of Cambridge.
2004 (engelsk)Inngår i: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 146, nr 1-2, s. 56-65Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this paper, the flow of a powder through a silo is investigated using Digital Speckle Radiography (DSR). This technique allows displacement measurements to be made on the sub-mm scale to an accuracy of 0.06 μm and a spatial resolution of 26 μm. The method performs an image cross-correlation on a random seeding of X-ray opaque material as it flows out of the silo with the powder. The flow is captured digitally using a continuous X-ray source and an image intensifier and Charge Coupled Device (CCD) camera to give real time measurements. The powder used is Al2O3 with an average particle size of 50 μm and the seeding material is tungsten powder, also with an average particle size of 50 μm. Clear flow behaviour is observed for two different sizes of outlet and the flow rate and strains occurring during the flow are also investigated.

sted, utgiver, år, opplag, sider
2004. Vol. 146, nr 1-2, s. 56-65
HSV kategori
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Experimentell mekanik
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URN: urn:nbn:se:ltu:diva-9326DOI: 10.1016/j.powtec.2004.07.009ISI: 000224727000006Scopus ID: 2-s2.0-4744358002Lokal ID: 7ecd81d0-c357-11db-9ea3-000ea68e967bOAI: oai:DiVA.org:ltu-9326DiVA, id: diva2:982264
Merknad
Validerad; 2004; 20061026 (cira)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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