Md. Readul Mahmud

Abstract: This work presents a design of a new micromixer named ‘Y-U’ based on the split and recombine (SAR) principle. Five mixers are constructed varying a parameter, vertical cylindrical connector height H (Y-UH), starting from 0 mm to 0.8 mm. Numerical analysis is carried out at Reynolds numbers ranging from 1 to 50 using FLUENT 15 for the purpose of optimization. A well-known SAR mixer, namely ‘H’ is also studied in order to validate the numerical model. Proposed Y-U mixers offer better mixing performance than H mixer regardless of Reynolds numbers. The Y-U mixers show more than 90% efficiency at low Reynolds numbers and efficiency is about 60% for Reynolds numbers from 10 to 50. Mixing efficiency depends on the vertical cylindrical connector height (H); efficiency and pressure drop increases with the increase of vertical cylindrical height. Y-U 0.8 mm (H = 0.8 mm) shows better maximum efficiency compare to all examined mixers. In addition, the mixing cost is independent of vertical cylindrical height.

Keywords: CFD, Micromixing, Micromixer, Mixing cost, SAR.

Date Published: August 3, 2021
DOI: 10.11159/jffhmt.2021.023

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