APPARENT VISCOSITY MIXING INDEX USING CFD COMPUTATIONS FOR NON-NEWTONIAN FLUIDS USING HELICAL RIBBON IMPELLER | ||||
| JES. Journal of Engineering Sciences | ||||
| Article 9, Volume 39, No 4, July and August 2011, Page 827-838 PDF (444.07 K) | ||||
| Document Type: Research Paper | ||||
| DOI: 10.21608/jesaun.2011.127720 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A.A. Rsheed; Y.S. Fangary; N.A. Mahmoud | ||||
| Mechanical power engineering dept. Faculty of engineering, Ain Shams University | ||||
| Abstract | ||||
| In the present study a mixing index was proposed in order to characterize mixing processes of non Newtonian fluids. The apparent viscosity in a mixing tank equipped with helical ribbon impeller was computed using a CFD package. The symmetry plane of the mixing tank was divided into sixteen zones where an average apparent dimensionless viscosity was calculated to each of these zones from which a mixing index was evaluated. The mixing index showed to increase with impeller rotational speed, impeller/tank diameter ratio and showed to be affected by the rheological parameters of the agitated fluid. The computed data of the mixing index were correlated as a function of impeller/tank diameter ratio, impeller rotational speed and rheological parameters. The proposed correlation deviated from computed data by a maximum deviation of ± 50%. | ||||
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