Original title: Estimation of turbulence dissipation rate by Large eddy PIV method in an agitated vessel
Authors: Kysela, Bohuš ; Jašíková, D. ; Konfršt, Jiří ; Šulc, R. ; Ditl, P.
Document type: Papers
Conference/Event: Experimental Fluid Mechanics 2014, Český Krumlov (CZ), 2014-11-18 / 2014-11-21
Year: 2014
Language: eng
Abstract: The distribution of turbulent kinetic energy dissipation rate is important for design of mixing apparatuses in chemical industry. Generally used experimental methods of velocity measurements for measurement in complex geometries of an agitated vessel disallow measurement in resolution of small scales close to turbulence dissipation ones. Therefore, Particle image velocity (PIV) measurement method improved by large eddy PIV approach was used. Large eddy PIV method is based on modeling of smallest eddies by a sub grid scale (SGS) model. This method is similar to numerical calculations using Large Eddy Simulation (LES) and the same SGS models are used. In this work the basic Smagorinsky model was employed and compared with power law approximation. Time resolved PIV data were processed by Large Eddy PIV approach and the obtained results of turbulent kinetic dissipation rate were compared in selected points for several operating conditions (impeller speed, operating liquid viscosity).
Keywords: Large Eddy Simulation; Particle image velocity; PIV measurements; SGS models
Project no.: GAP101/12/2274 (CEP), LO1201 (CEP)
Funding provider: GA ČR, GA MŠk
Host item entry: Experimental Fluid Mechanics 2014 Conference Proceedings

Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0250313

Permalink: http://www.nusl.cz/ntk/nusl-200736


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Research > Institutes ASCR > Institute of Hydrodynamics
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