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Experimental Assessment and CFD Simulations of Local Solid Concentration Profiles in a Pilot-Scale Stirred Tank
Špidla, M., Moštěk, M., Sinevič, V., Jahoda, M. and Machoň, V. Experimental Assessment and CFD Simulations of Local Solid Concentration Profiles in a Pilot-Scale Stirred Tank Chemical Papers, Vol.59, No. 6a, 2005, 386-393
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n596aa386.pdf
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596aa386.pdf |
application/pdf |
2.11MB |
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| Author(s) |
Špidla, M.
Moštěk, M.
Sinevič, V.
Jahoda, M.
Machoň, V.
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| Title |
Experimental Assessment and CFD Simulations of Local Solid Concentration Profiles in a Pilot-Scale Stirred Tank
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| Journal name |
Chemical Papers
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| Publication date |
2005
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| Year available |
2005
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| Volume number |
59
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| Issue number |
6a
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| ISSN |
0366-6352
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| Start page |
386
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| End page |
393
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2005
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| Language |
english
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| Subject |
290000 Engineering and Technology
290600 Chemical Engineering
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| Abstract/Summary |
An experimental assessment of solid particle distribution in a stirred vessel was performed by conductivity measurements, and for the same solid-liquid system, the capabilities of the Computational Fluid Dynamics (CFD) simulation were investigated. A detailed particle distribution measurement of a solid-liquid suspension at the just-suspended state was carried out in a pilot-plant stirred vessel of one meter in diameter. This baffled stirred tank was agitated with a pitched blade turbine, which generates an axial-flow pattern in the tank. The water suspension of glass beads of diameter 0.35 mm was studied. Average particle concentration was 5 vol. %. In this mode of experimental arrangement, a particle-filled layer of suspension was observed. Axial and radial particle concentration gradients and their standard deviations were determined. CFD simulations were performed using a two-phase model implemented in the commercial code Fluent 6.2. The Eulerian-Eulerian multiphase model was adopted in conjunction with the Multiple Reference Frames and the “mixture” k-ε turbulence model. Computational results are compared with the experimental data and critically discussed. The simulation results are in agreement with experiment, but the drag coefficient for particles settling in a stagnant fluid needs to be corrected in order to obtain acceptable results for a turbulent flow regime.
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