Numerical Study of Three-Winged Passive Micromixer Based on Sar Principle

Abstract

The passive three wings micromixer is presented according to the SAR principle. CFD numerically examined the mixer's efficiency for a wide range of Reynolds numbers up to 100. Three factors were used to test the efficiency of mixer performance. These three were the change in the fluids inlets velocity, connections with twisted angle, and a variable diameter obstacle to validate the submitted model. Besides, the pressure drop was studied for three types of micromixers. When comparing results, we found promising results in Reynolds numbers less than 0.1 for every style. Crucial differences were found between them when the degree of connections being twisted had increased, especially at 1.5 revolutions. The mixing index was greater than 90% independent of the Reynolds numbers and all ratios. Additionally, a drop of pressure was achieved along with the mixer of the twisted type 1.5 rev. higher than other mixers. © 2021, Avestia Publishing. All rights reserved.