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Title: Experimental Investigations of Flow and Mixing in Taylor-Couette Reactor using PIV and LIF Methods Racina, Anna (Author)Požarnik, Matej (Author)Kind, Matthias (Author) http://www.ripublication.com/ijdfvol1.htm English Unknown () 1.01 - Original Scientific Article FS - Faculty of Mechanical Engineering Modern laser-optical methods (Particle Image Velocimetry and Laser Induced Fluorescence) for flow characterization are implemented to study the mixing behavior in Taylor-Couette Reactor without axial flow. In this study, cylinders with a radius-ratio equal to 0.63 are taken into account, which results in a direct transition from laminar fluid flow regime to a turbulent one. During PIV measurements special attention is paid to the system settings at which the error vector fraction is minimized. Energy dissipation rate and the distribution of local micromixing times are calculated from PN data. The average dissipation rate has values in the order of magnitude of 1▫$^{-3}$▫- 1▫$0^{-1}$▫ W/kg depending on the rotation rate of inner cylinder. The corresponding micromixing times are from 50 down to 5 ms. For LIF experiments the calibration procedure and the image processing sequence are presented. LIF data are used to study macro- and mesomixing. Macromixing in axial direction is approximated using a one-parameter model of mixing (cascade of stirred vessels). The value of diffusion coefficient (3 1▫$0^{-5}$▫) m2/s) agrees well with values published in literature. The methodology of determining the segregation index and the local mesomixing times in the flow is introduced, followed by the presentation of selected results. fluid mechanics, mixing, laser induced flourescence method 2005 532.5:519.61/.64 Y505-3455 9877270 URN:SI:UM:DK:4SLSOCRJ 1119 39 Misc.

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## Record is a part of a journal

Title: International journal of dynamics of fluids Int. j. dyn. fluids Research India Publications 0973-1784 9875734

## Secondary language

Language: English mehanika tekočin, mešanje, gibanje delcev, lasersko inducirana fluorescenčna metoda, delci