Comparison of mixing performances of T, Y and arrow-shaped micromixers using Villermaux-Dushman protocol at low Reynolds number

Main Article Content

Onyeka Stanislaus Okwundu
https://orcid.org/0000-0002-7655-2392
Mohammed Fuseini
Ahmed H. El-Shazly
Marwa F. Elkady

Abstract

Mixing performance is commonly assessed using the Villermaux–Dushman protocol. Mixing in passive mixers may need to be at very low Rey­nolds number (Re). This study is aimed at comparing the mixing performances of T, Y and arrow-shaped micromixers using the Villermaux–Dushman proto­col at Re < 100. The mixing performance test was run at flow rates of 500 to 1 mL h-1 with the pressure drop measurement. Based on UV absorbance values and experimental mixing times of mixed fluids from the three micromixers, the order of mixing performance at Re > 26.5 was Y < T < arrow-shaped micro­mixers. At lower Re values, the order of performance based on the absorbance and the experimental mixing times, became inconsistent. However, the com­parison of mixing performance based on predicted mixing time gave consistent order of performance at all Re values. The instability in UV absorbance of mixed reagents in Villermaux–Dushman protocol was noted as the major cause of the reported inconsistency at very low Re. The inadequacy of Villermaux–Dushman protocol at low Re was verified via facile solvent extraction test. A more reliable technique should be used to assess the mixing performance of micromixers at very low Re and on-line UV measurement should be adopted for the Villermaux–Dushman experiment.

Article Details

How to Cite
[1]
O. S. Okwundu, M. Fuseini, A. H. El-Shazly, and M. F. Elkady, “Comparison of mixing performances of T, Y and arrow-shaped micromixers using Villermaux-Dushman protocol at low Reynolds number”, J. Serb. Chem. Soc., vol. 85, no. 3, pp. 381-394, Mar. 2020.
Section
Chemical Engineering
Author Biographies

Onyeka Stanislaus Okwundu, Department of Chemical and Petrochemical Engineering, Egypt-Japan University of Science and Technology (E-JUST) and Department of Chemical Engineering, University of Benin

Mr. Okwundu is a First Class Graduate of Chemical Engineering from Nigeria, currently in pursuit of his MSc. in Chemical Engineering at Egypt-Japan University. His published works evidence his interests in vast aspects of Chemical Engineering. His current research includes heterogenous catalysts and catalysis for biodiesel production.

Mohammed Fuseini, Department of Chemical and Petrochemical Engineering, Egypt-Japan University of Science and Technology (E-JUST)

Mr. Fuseini is a Metallurgical Engineer who is currently pursuing his MSc degree in Chemicals and Petrochemicals Engineering. His research is centered but not limited to corrosion control with advanced materials.

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