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Volumetric 3D velocimetry measurements of flow around a Rushton turbine

dc.contributor.authorSharp, K.V.
dc.contributor.authorHill, D.F.
dc.contributor.authorTroolin, D.
dc.contributor.authorWalters, G.
dc.contributor.authorLai, W.
dc.date.accessioned2009-10-13T17:41:43Z
dc.date.available2009-10-13T17:41:43Z
dc.date.issued2009-10-13T17:41:43Z
dc.descriptionThis video has been submitted to the APS DFD Gallery of Fluid Motion at the Annual Conference in 2009.en_US
dc.description.abstractVolumetric 3-component velocimetry measurements have been taken of the flow field near a Rushton turbine in a stirred tank reactor. This highly unsteady, three-dimensional flowfield is characterized by a strong radial jet, large tank-scale ring vortices, and small-scale blade tip vortices. Approximately 15,000 3d vectors were obtained in a cubic volume; these data offer the most comprehensive view to date of this flow field, especially since they are acquired at three Reynolds numbers (15,000, 107,000, and 137,000). The fluid dynamics video shows various animations and combinations of the velocity and vorticity data. The volumetric nature of the data enable tip vortex identification, vortex trajectory analysis, and calculation of vortex strength. In the video, three identification methods for the vortices are compared based on: the calculation of circumferential vorticity; the calculation of local pressure minima via an eigenvalue approach (`$\lambda_2$') ; and the calculation of swirling strength again via an eigenvalue approach (`$\lambda_{ci}$'). A `swirl strength' criterion overall provides clearest identification of the tip vortices. The visualization of tip vortices up to 140 degrees past blade passage in the highest Reynolds number case is notable and has not previously been shown.en_US
dc.description.sponsorshipPartially funded by an American Chemical Society Petroleum Research Fund grant.en_US
dc.identifier.citationExperiments in Fluids (2009), online first, doi 10.1007/s00348-009-0711-9.en_US
dc.identifier.urihttps://hdl.handle.net/1813/13864
dc.publisherSpringeren_US
dc.subjectfluid dynamics videoen_US
dc.subjectRushton turbineen_US
dc.subjectthree-dimensionalen_US
dc.subjectPIVen_US
dc.subjectvelocimetryen_US
dc.subjectvortex identificationen_US
dc.subjectmixeren_US
dc.titleVolumetric 3D velocimetry measurements of flow around a Rushton turbineen_US
dc.typevideo/moving imageen_US

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3D measurements of flow around a Rushton turbine (mpeg-1 format)
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3D measurements of flow around a Rushton turbine (mpeg-2 format)