Natural convection study of brownian nano-size particles inside a water-filled cavity by lagrangian-eulerian tracking approach

dc.contributor.authorMahdavi, Mostafaen
dc.contributor.authorSharifpur, Mohsenen
dc.contributor.authorMeyer, Josua P.en
dc.date.accessioned2017-08-28T07:07:38Z
dc.date.available2017-08-28T07:07:38Z
dc.date.issued2016en
dc.descriptionPapers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.en
dc.description.abstractIn this research Lagrangian method is employed to track the nanoparticles inside a differentially heated walls nanofluidfilled cavity in natural convective flow. The thermo-physical properties of the solid-liquid mixture is also included in Eulerian frame. There are multiple interactions between fluid and particles which turns the simulations for solid-liquid highly complicated. ANSYS FLUENT 15.0 was used in this research to model submicron particles. Moreover, important interaction forces are implemented in the software as a User Defined Function (UDF) to modify the Lagrangian model. Brownian movement of the particles is assumed as a diffusion force acting on each particle during small user defined time step. Pressure gradient, gravity, virtual mass and Thermophoresis forces have also added to the force balance equation. Electrostatic forces are the contributing factors for stability of the nanofluid which they are needed to be present in dynamic equation of the particles. The importance of the forces on distribution of the particles is compared. The results show that the presence of these forces has considerable impact on nanoparticles concentration profiles.en
dc.format.extent4 pagesen
dc.format.mediumPDFen
dc.identifier.urihttp://hdl.handle.net/2263/61882
dc.language.isoenen
dc.publisherHEFATen
dc.rightsUniversity of Pretoriaen
dc.subjectbrownian nano-size particlesen
dc.subjectlagrangian-eulerian tracking approachen
dc.subjectwater-filled cavityen
dc.subjectNatural convection studyen
dc.titleNatural convection study of brownian nano-size particles inside a water-filled cavity by lagrangian-eulerian tracking approachen
dc.typePresentationen

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