{"id":121,"date":"2023-08-24T23:43:11","date_gmt":"2023-08-25T06:43:11","guid":{"rendered":"https:\/\/blogs.ubc.ca\/mdaneshi\/?page_id=121"},"modified":"2023-08-25T11:37:55","modified_gmt":"2023-08-25T18:37:55","slug":"characterizing-jamming-of-dilute-and-semi-dilute-fibre-suspensions-in-a-sudden-contraction-and-a-t-junction","status":"publish","type":"page","link":"https:\/\/blogs.ubc.ca\/mdaneshi\/sample-page\/characterizing-jamming-of-dilute-and-semi-dilute-fibre-suspensions-in-a-sudden-contraction-and-a-t-junction\/","title":{"rendered":"Characterizing Jamming of Dilute and Semi-Dilute Fibre Suspensions in a Sudden-Contraction and a T-Junction (PI: Prof. Mark Martinez)"},"content":{"rendered":"

The clogging or jamming of non-Brownian particle suspensions is a ubiquitous problem hindering the efficiency of particle-liquid and particle-particle separations. Motivated by pressure screening in the Pulp and Paper Industry, we characterize jamming of dilute and semi-dilute mono-disperse rigid-rod suspension passing through channels mimicking dead-end and cross-flow filtration membranes, experimentally, using particle-tracking velocimetry. We observe that jams nucleated by either bridging of isolated particles across the constriction or by localized mechanical entanglement of the particles, i.e. flocculation. Uniquely, we observe floc-formation during acceleration into the aperture and report this as the primary mechanism for jam-ming events. We characterized the accumulation-release cycles of the jamming event using an exponential probability distribution (\u03a8); this distribution is indicative of a Poisson process. For jams nucleated by single-particle bridging, \u03a8 is (primarily) related to the number of fibres passing through the aperture; this is similar to dry, granular materials. For floc-based nucleation events, \u03a8 is (primarily) related to the suspension concentration with the average time between jams decreasing inversely with the square root of the initial suspension concentration. For the conditions tested, the distribution of \u03a8 was insensitive to changes in constriction geometry.\"\"<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

The clogging or jamming of non-Brownian particle suspensions is a ubiquitous problem hindering the efficiency of particle-liquid and particle-particle separations. Motivated by pressure screening in the Pulp and Paper Industry, we characterize jamming of dilute and semi-dilute mono-disperse rigid-rod suspension passing through channels mimicking dead-end and cross-flow filtration membranes, experimentally, using particle-tracking velocimetry. We observe […]<\/p>\n","protected":false},"author":62370,"featured_media":0,"parent":2,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-121","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/pages\/121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/users\/62370"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/comments?post=121"}],"version-history":[{"count":2,"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/pages\/121\/revisions"}],"predecessor-version":[{"id":157,"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/pages\/121\/revisions\/157"}],"up":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/pages\/2"}],"wp:attachment":[{"href":"https:\/\/blogs.ubc.ca\/mdaneshi\/wp-json\/wp\/v2\/media?parent=121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}