?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F269%2F&rft.title=Development+and+Persistence+of+'Static'+or+'Dead'+Zones+in+Flows&rft.creator=Braun%2C+Richard&rft.creator=Breward%2C+Chris&rft.creator=Cook%2C+L.+Pamela&rft.creator=Cromer%2C+Mike&rft.creator=Edwards%2C+David+A.&rft.creator=Hibdon%2C+Joseph&rft.creator=Please%2C+Colin&rft.creator=Taroni%2C+Michele&rft.creator=Zhang%2C+Shangyou&rft.subject=Materials&rft.description=Certain+ceramic+products+are+formed+through+extrusion+processes%2C+where+a+slurry+is+forced+through+small+openings+to+form+such+products+as+filters.+At+the+top+is+a+large+tank.+The+slurry+is+forced+through+the+tank+into+an+extrusion+chamber%2C+and+then+out+through+slots+to+form+the+finished+product.%0D%0A%0D%0A%5BThe+slurry+may+be+thought+of+as+a+mixture+of+clay+(or+other+polymers)%2C+water%2C+and+other+binders.+There+are+many+ways+to+model+this+mixture%2C+some+of+which+will+be+discussed+in+this+report.+For+instance%2C+the+slurry+can+be+modeled+as+a+non-Newtonian+fluid%2C+a+two-phase+flow+with+liquid+and+solids%2C+or+a+viscoelastic+fluid.+One+can+also+model+the+mixture+as+an+elongated+particle+suspension+in+water%2C+where+changes+in+the+orientation+of+the+particles+could+affect+the+flow.%5D%0D%0A%0D%0AAfter+the+extrusion+process+is+complete%2C+one+finds+that+%E2%80%98dead+zones%E2%80%99+of+dry+paste+accumulate+in+two+areas.+Most+prominently%2C+they+occur+at+the+lower+corners+of+the+tank.+They+also+occur+on+the+floor+of+the+extrusion+chamber+near+the+slots%2C+both+near+and+away+from+the+walls.+Since+we+will+consider+wall+effects+in+the+tank%2C+for+the+extrusion+chamber+we+consider+only+flow+cells+sufficiently+far+away+from+the+walls.+Then+we+may+exploit+the+periodic+nature+of+the+device+and+consider+only+a+single+flow+cell.%0D%0A%0D%0AThe+aim+of+this+project+is+to+determine+the+formation+mechanisms+of+these+dead+zones%2C+and+see+how+they+affect+the+overall+flow.&rft.date=2009&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F269%2F1%2Fcorning.pdf&rft.identifier=++Braun%2C+Richard+and+Breward%2C+Chris+and+Cook%2C+L.+Pamela+and+Cromer%2C+Mike+and+Edwards%2C+David+A.+and+Hibdon%2C+Joseph+and+Please%2C+Colin+and+Taroni%2C+Michele+and+Zhang%2C+Shangyou++(2009)+Development+and+Persistence+of+'Static'+or+'Dead'+Zones+in+Flows.++%5BStudy+Group+Report%5D+++++