?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%2F328%2F&rft.title=Minimum+Particle+Size+for+Cyclone+Dust+Separator&rft.creator=Byatt-Smith%2C+J.&rft.creator=Day%2C+R.&rft.creator=Harlen%2C+O.&rft.creator=Howison%2C+S.D.&rft.creator=Lister%2C+J.&rft.creator=Smith%2C+S.L.&rft.creator=Stone%2C+R.&rft.subject=Environment&rft.subject=Transport+and+Automotive&rft.subject=Materials&rft.description=Perkins+technology+wish+to+separate+small+soot+particles+from+exhaust+gases%2C+and+the+question+posed+to+the+study+group+was+to+determine+the+feasibility+of+using+a+cyclone+separator+to+remove+these+particles.+Soot+is+mostly+composed+of+polycyclicaromatic+compounds+and+results+from+the+incomplete+combustion+of+the+diesel+fuel+in+the+engine.+The+average+size+of+the+particles+formed+in+the+engine+is+in+the+range+3+to+10+nm+in+diameter%2C+but+this+is+known+to+increase+within+the+exhaust+system.%0D%0A%0D%0AIn+the+first+part+of+this+report+we+determine+the+minimum+particle+size+that+can+be+removed+by+centrifugal+separation.+%0D%0AThe+second+part+discusses+the+mechanisms+for+particle+growth+within+the+exhaust+system+in+order+to+estimate+the+particle+growth+rate.%0D%0A%0D%0AIn+section+two+we+estimate+the+minimum+particle+diameter+that+can+be+removed+by+a+cyclone+separator+is+around+one+micron.+This+estimate+is+consistent+with+current+applications+of+hydrocyclones.+The+particle+size++measurements+by+Perkins+Technology+together+with+our+estimates+from+section+three%2C+suggest+that+the+soot+particles+are+an+order+of+magnitude+smaller+than+this.+Although+it+may+be+possible+to+remove+some+particles+less+than+one+micron+in+diameter+with+a+well+designed+high-speed+cyclone%2C+we+do+not+think+it+will+be+possible+to+remove+a+substantial+proportion+of+100+nm+or+smaller+particles.%0D%0A%0D%0AThe+growth+rate+of+the+particles+increases+if+the+particles+volume+fraction+or+the+polydispersity+is+increased.+Therefore+aggregation+could+be+enhanced+by+the+addition+of+larger+particles+(d+%3E+1+%C2%B5m)+or+water+droplets+(provided+the+water+does+not+all+vapourise)+to+the+exhaust+gas.&rft.date=1996&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%2F328%2F1%2Fminimum-particle-size-for-cyclone-dust-separator.pdf&rft.identifier=++Byatt-Smith%2C+J.+and+Day%2C+R.+and+Harlen%2C+O.+and+Howison%2C+S.D.+and+Lister%2C+J.+and+Smith%2C+S.L.+and+Stone%2C+R.++(1996)+Minimum+Particle+Size+for+Cyclone+Dust+Separator.++%5BStudy+Group+Report%5D+++++