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Vol. 131, Issue 8, August 2011, pp.110-120

 

Bullet

 

Passive Micromixing Solution

 

1Brahim DENNAI, 1Rachid KHELFAOUI, 2Boumédiène BENYOUCEF and 3Asma ABDENBI

1 Laboratory ENERGARID, University of Bechar, B. P. 417, 08000 Bechar, Algeria

Tel.: 213 49 81 55 81/91, fax: 213 49 81 52 44

2 Laboratory URMER, University of Abu Bakr Belkaid, Tlemcen, Algeria

3University of Bechar, B. P. 417, 08000 Bechar, Algeria

 

 

Received: 16 July 2011   /Accepted: 22 August 2011   /Published: 30 August 2011

Handbook of Laboaratory Measurements book

 

Abstract: Mixing rate is characterized by the diffusion flux given by the Fick’s law. A passive mixing strategy is proposed to enhance mixing of two fluids through perturbed jet flow. A numerical study of passive mixers has been presented. This paper is focused on the modeling of a micro-injection systems composed of passive amplifier without mechanical part. The micro-system modeling is based on geometrical oscillators form. An asymmetric micro-oscillator design based on a monostable fluidic amplifier is proposed. The characteristic size of the channels is generally about a few hundred of microns. The numerical results indicate that the mixing performance can be as high as 92 % within a typical mixing chamber of 2.25 mm diameter and 0.20 mm length when the Reynolds number is Re = 490. In addition, the results confirm that self-rotation in the circular mixer significantly enhances the mixing performance. The novel micro mixing method presented in this study provides a simple solution to mixing problems in micro system.

 

Keywords: Modelling, Micro mixture, Diffusion, Size effect

 

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