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TRANSIENT FLOW SIMULATION OF A MIXER WITH FREE SURFACE  

Ahn, Ick-Jin (서강대학교 대학원)
Song, Ae-Kyung (서강대학교 대학원)
Hur, Nahm-Keon (서강대학교 기계공학과)
Publication Information
Journal of computational fluids engineering / v.11, no.4, 2006 , pp. 9-13 More about this Journal
Abstract
In the present study, a numerical analysis of transient mixer flow is performed considering free surface formation. The flow patterns and free surface shape in a mixers formed by flat paddle and pitched paddle impellers are predicted. In a flat paddle mixer, two flow circulation regions are formed due to strong radial flow, whereas one large circulation is formed in a pitched paddle mixer due to axial downward flow. These differences affect the free surface evolution and shape. It is seen from the results that a flat paddle mixer gives deeper free surface at center region than a pitched paddle mixer. The free surface of 8-blades-flat-paddle mixer is also simulated to compare with the available experimental and simulation results. The present computational results agree reasonably well with the experimental data.
Keywords
Free surface; Vortex; Volume of Fluid Method; MRF(Multiple Rotating Reference Frames; Flow pattern; Transient Simulation;
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  • Reference
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