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{ "etd": null, "Title": "5.5.2 - Influence of collisions on particle behavior in a turbulent wall-bounded flow", "scale": null, "edition": null, "Abstract": [ { "#text": "In this work, a Direct Numerical Simulation coupled with Lagrangian particle tracking is used to study the influence of\nbinary collisions occurring in a turbulent boundary layer. Large samples of particles characterized by different inertia\nhave been released in an incompressible and Newtonian air flow at Re = 150. The reference geometry consists of\ntwo flat, infinite, parallel walls separated by a distance of 2h = 0:04 m. The domain is periodic in the streamwise\n(x) and spanwise (y) direction and no-slip boundary is enforced at the walls. A hard sphere collision model has been\nimplemented to account for particle-particle and particle-wall interactions using a neighbour list approach with linked\nlists method to optimize the collision detection in the domain (Sundaram and Collins (1996)). Particle kinetic energy\ncalculated in presence of collisions changes depending on both particle inertia and collision rate, and it is found to be\nhigher than in the case without collisions. Reasons for this behavior are associated with the multiple collision events\nclose to the wall which are able to re-suspend particles to the channel core and so, to a region characterized by higher\nvelocity and energy. The relative velocity between two colliding particles is also evaluated to characterize different\ntypes of collisions responsible for particle energy modification and accumulation/re-suspension.", "@lang": "en" } ], "Creators": [ { "name": "Lavezzo, V.", "role": "creator" }, { "name": "Soldati, A.", "role": "creator" } ], "subjects": [ { "subject_fields": { "topic": [ "DNS" ] }, "subject_string": "DNS" }, { "subject_fields": { "topic": [ "Lagrangian tracking" ] }, "subject_string": "Lagrangian tracking" }, { "subject_fields": { "topic": [ "turbulent scales" ] }, "subject_string": "turbulent scales" }, { "subject_fields": { "topic": [ "particle-particle collisions" ] }, "subject_string": "particle-particle collisions" } ], "Publisher": "International Conference on Multiphase Flow (ICMF)", "conv_date": "2010-06-04", "mediatype": { "mods_type": "mixed material", "anubis_type": "Mixed Material" }, "pageCount": 7, "GeneralNote": [ "The International Conference on Multiphase Flow (ICMF) first was held in Tsukuba, Japan in 1991 and the second ICMF took place in Kyoto, Japan in 1995. During this conference, it was decided to establish an International Governing Board which oversees the major aspects of the conference and makes decisions about future conference locations. Due to the great importance of the field, it was furthermore decided to hold the conference every three years successively in Asia including Australia, Europe including Africa, Russia and the Near East and America. Hence, ICMF 1998 was held in Lyon, France, ICMF 2001 in New Orleans, USA, ICMF 2004 in Yokohama, Japan, and ICMF 2007 in Leipzig, Germany. ICMF-2010 is devoted to all aspects of Multiphase Flow. Researchers from all over the world gathered in order to introduce their recent advances in the field and thereby promote the exchange of new ideas, results and techniques. The conference is a key event in Multiphase Flow and supports the advancement of science in this very important field. The major research topics relevant for the conference are as follows: Bio-Fluid Dynamics; Boiling; Bubbly Flows; Cavitation; Colloidal and Suspension Dynamics; Collision, Agglomeration and Breakup; Computational Techniques for Multiphase Flows; Droplet Flows; Environmental and Geophysical Flows; Experimental Methods for Multiphase Flows; Fluidized and Circulating Fluidized Beds; Fluid Structure Interactions; Granular Media; Industrial Applications; Instabilities; Interfacial Flows; Micro and Nano-Scale Multiphase Flows; Microgravity in Two-Phase Flow; Multiphase Flows with Heat and Mass Transfer; Non-Newtonian Multiphase Flows; Particle-Laden Flows; Particle, Bubble and Drop Dynamics; Reactive Multiphase Flows" ], "SeriesTitle": "7th International Conference on Multiphase Flow - ICMF 2010 Proceedings", "identifiers": [], "imageSrcUrl": [ { "src": "00552-Lavezzo-ICMF2010_Page_1.jpg", "title": "Page 1", "fileid": "JPEG1", "pageid": "PAGE1" }, { "src": "00552-Lavezzo-ICMF2010_Page_2.jpg", "title": "Page 2", "fileid": "JPEG2", "pageid": "PAGE2" }, { "src": "00552-Lavezzo-ICMF2010_Page_3.jpg", "title": "Page 3", "fileid": "JPEG3", "pageid": "PAGE3" }, { "src": "00552-Lavezzo-ICMF2010_Page_4.jpg", "title": "Page 4", "fileid": "JPEG4", "pageid": "PAGE4" }, { "src": "00552-Lavezzo-ICMF2010_Page_5.jpg", "title": "Page 5", "fileid": "JPEG5", "pageid": "PAGE5" }, { "src": "00552-Lavezzo-ICMF2010_Page_6.jpg", "title": "Page 6", "fileid": "JPEG6", "pageid": "PAGE6" }, { "src": "00552-Lavezzo-ICMF2010_Page_7.jpg", "title": "Page 7", "fileid": "JPEG7", "pageid": "PAGE7" } ], "serial_info": [], "Aggregations": [ { "code": "ufir", "name": "Institutional Repository at the University of Florida (IR@UF)", "type": null, "shortname": "IR@UF: UF Institutional Repository" } ], "MainThumbnail": "00552-Lavezzo-ICMF2010_Page_1thm.jpg", "PermanentLink": "http://ufdc.ufl.edu/UF00102023/00132", "HoldingLocation": [ "University of Florida", { "text": "UF", "type": "code" } ], "PublicationDate": [ "June 4, 2010" ], "item_sort_title": "552 - INFLUENCE OF COLLISIONS ON PARTICLE BEHAVIOR IN A TURBULENT WALL-BOUNDED FLOW", "SourceInstitution": "University of Florida", "PhysicalDescription": "Conference Papers", "VisibilityRestrictions": null, "ip": "216.73.216.120", "ip_restriction_mask": 0, "has_pagetext": true }