Entrainment of air driven by rotational field inside viscous liquids

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dc.contributor.author Prajapati, M. en
dc.contributor.author Kumar, P. en
dc.contributor.author Das, A.K. en
dc.contributor.author Mitra, S.K. en
dc.date.accessioned 2017-09-19T12:48:17Z
dc.date.available 2017-09-19T12:48:17Z
dc.date.issued 2017 en
dc.description Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 . en
dc.description.abstract Here, we propose an intelligent method for entrainment of air inside viscous liquids using submerged rotational mechanisms. A cylindrical disc is immersed inside liquid with its axis transverse to the nominal interfacial plane and rotated at wide range of rotational Reynolds number (4.88 - 14.64). This configuration is simulated using grid based volume of fluid technique in air-polybutene pair. A dip in nominal interface profile is observed at low disc rotations however, gradual progress of rotational inertia has resulted in elongation of interface in the form of a filament of air progressing inside liquid. Transient progress of entrainment depicts pointed curvature like cusped singularities in its profile during the early stages. When this cusp like entrainment gets into the high inertial zone, it grows in radial direction, along with its downward growth due to the centrifugal effect of the surrounding liquid. The interplay of inertia and viscous resistance is also controlled by the initial submergence of the rotating disc along with its rotational inertia. The outcome of the present study could be utilized for the design of chemical reactors, mixing processes and devices relating transfer process as working principle. en
dc.description.sponsorship International centre for heat and mass transfer. en
dc.description.sponsorship American society of thermal and fluids engineers. en
dc.format.extent 6 pages en
dc.format.medium PDF en
dc.identifier.uri http://hdl.handle.net/2263/62322
dc.language.iso en en
dc.publisher HEFAT en
dc.rights University of Pretoria en
dc.subject Viscous liquids en
dc.subject Entrainment en
dc.subject Rotational field en
dc.title Entrainment of air driven by rotational field inside viscous liquids en
dc.type Presentation en


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