Numerical Analysis of Magnetic Mixing Phenomenon in an Electroosmotic Flow between Two Parallel Plates

علوم کاربردی و محاسباتی در مکانیک

Article 10, Volume 32, Issue 1 - Serial Number 23, 2021, Pages 174-190   

Document Type: Original Article

DOI: 10.22067/jacsm.2021.67094.0

Authors

Morteza Dallakehnejad¹; Seyed Ali Mirbozorgi^{* 2}; Hamid Niazmand³

¹Ebnehesam College, Technical and Vocational University of South Khorasan, Birjand, Iran.

²Department of Mechanical Engineering, University of Birjand, Birjand, Iran.

³, Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.

Abstract

In the present paper, the mixing in electroosmotic flow is studied numerically and simulated in the presence of a magnetic field with three different locations. The flow geometry was included a two-dimensional duct between two parallel plates, and the flow was assumed to be incompressible, steady and laminar. The governing equations of the problem, including modified momentum equations (Navier-Stokes) for the fluid flow field, the equations of external and internal electric potential fields, the equations of distribution of the positive and negative ions (Nernst-Planck), the magnetic field equation, and the concentration equation for species have been solved using the finite volume numerical method. The obtained numerical results were validated against the analytical solutions of an EOF with uniform microchannel walls zeta potentials. The numerical results show that in the presence of a magnetic field, so the final mixing efficiency reaches to 93.3 %. However, this is while the magnetic field has been applied before the electric double layer.

Keywords

Micro-Mixer; Mixing Efficiency; Electric Field; Numerical Simulation; Navier-Stokes

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