Numerical Simulation of Fluid Flow in a New High Efficient Mixer

Abstract:

In order to determine proper structural parameters of the new high efficient mixer created by the author, the CFD software is applied to simulate numerically three dimensional incompressible turbulent fields for three static mixing units and the mixing unit with rotating impellor. The static mixing units include three kinds of spiral blades that are single-blade style, three-blade style and four-blade style. Geometric models are built by Pro/ENGINEER and exported to Fluent. The time-mean Reynolds equations and standard turbulent model are applied, and the post-processing software is used to analyze the computational results, and velocity contours and stress contours of mixing fluids in the static mixer will be obtained. The computational results indicate that the direction of outlet velocity of three-blade fluid flow turns more dramatically in comparison with that of single-blade and four-blade fluid flow, and the shearing stress is more remarkable. Because the internal stress of three-blade fluid changes more, the mixing action among fluids is more intensified. All these show three-blade spiral blades have the best mixing effects for local fluids. The rotating impellor mounted between blades can change fluid flow direction and improve the mixing effect for local fluids, which is moved by fluid flow with some velocity.

• Periodical: Applied Mechanics and Materials (Volume 251)
• Pages: 226-230
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.251.226
• Online since: December 2012
• Authors: Qing Wu, Ya Chen Zhang, Xue Jun Liu, Bao An Han
• Keywords: Flow Field, High Efficient Mixer, Numerical Simulation, Rotating Impellor, Spiral Blade

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