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Received February 16, 2014
Accepted September 1, 2014
- This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Turbulent flow and mixing performance of a novel six-blade grid disc impeller
1School of Mechanical Engineering, Shandong University, Jinan 250061, China 2Ministry of Education, Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Jinan 250061, China 3Tianli Drying Equipment Incorporated Company, Shandong Province Academy of Sciences, Jinan 250014, China
Korean Journal of Chemical Engineering, May 2015, 32(5), 816-825(10), 10.1007/s11814-014-0255-4
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Abstract
A novel six-blade grid disc impeller (RT-G) was designed and the single-phase turbulent flow and mixing in a baffled stirred tank agitated by this impeller were numerically studied by detached eddy simulation (DES) model. For comparison, a standard Rushton impeller (RT) with the same dimension was also investigated. The numerical results were compared with the reported experimental data and good agreements were obtained. Comparisons of the mean velocity, turbulent kinetic energy, power consumption and mixing time of RT and RT-G were performed. Results show that, for the tank stirred with RT-G, the velocity components can be increased in comparison with RT when the same power is consumed. The increase of the turbulent kinetic energy is about 20-30%. Besides, the mixing time for the tank stirred with RT-G is about 11% shorter than that of RT stirred tank operated at the same condition.
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Fentiman NJ, St Hill N, Lee KC, Paul GR, Yianneskis M, Chem. Eng. Res. Des., 76(7), 835 (1998)
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Brucato A, Ciofalo M, Grisafi F, Micale C, Chem. Eng. Sci., 53(21), 3653 (1998)
Jenne M, Reuss M, Chem. Eng. Sci., 54(17), 3921 (1999)
Murthy BN, Joshi JB, Chem. Eng. Sci., 63(22), 5468 (2008)
Bujalski W, Jaworski Z, Nienow AW, Chem. Eng. Res. Des., 80(1), 97 (2002)
Jaworski Z, Bujalski W, Otomo N, Nienow AW, Chem. Eng. Res. Des., 78(3), 327 (2000)
Osman JJ, Varley J, IChemE Symp. Ser., 146, 15 (1999)
Gimbun J, Rielly CD, Nagy ZK, Derksen JJ, AIChE J., 58(10), 3224 (2012)
Yang FL, Zhou SJ, Wang GC, Comput. Fluids, 64, 74 (2012)
Yang FL, Zhou SJ, Zhang CX, Evans GM, Wang GC, Chem. Eng. Commun., 200(10), 1347 (2013)
Yang FL, Zhou SJ, Zhang CX, Wang GC, Korean J. Chem. Eng., 30(10), 1843 (2013)
Zadghaffari R, Moghaddas JS, Revstedt J, Comput. Fluids, 39, 1183 (2010)
Revstedt J, Fuchs L, Tragardh C, Chem. Eng. Sci., 53(24), 4041 (1998)
Hockey RM, Ph.D. Thesis, Imperial College, London (1990)
Javed KH, Mahmud T, Zhu JM, Chem. Eng. Process., 45(2), 99 (2006)
Alvarez-Hernandez MM, Shinbrot T, Zalc J, Muzzio FJ, Chem. Eng. Sci., 57(17), 3749 (2002)
Delafosse A, Line A, Morchain J, Guiraud P, Chem. Eng. Res. Des., 86(12A), 1322 (2008)
Togatorop A, Mann R, AIChE Symp. Ser., 90, 19 (1994)
Distelhoff MF, Marquis AJ, Nouri JM, Whitelaw JH, Can. J. Chem. Eng., 75(4), 641 (1997)
Ascanio G, Castro B, Galindo E, Chem. Eng. Res. Des., 82(9), 1282 (2004)
Harvey AD, Rogers SE, AIChE J., 42(10), 2701 (1996)
Shekhar SM, Jayanti S, Chem. Eng. Res. Des., 80(5), 482 (2002)
Rutherford K, Lee KC, Mahmoudi SM, Yianneskis M, AIChE J., 42(2), 332 (1996)