Abstract
AbstractMany micromixing applications require simple structured passive mixers rather than complex structured passive or expensive active mixers. However, mixing quality in a typical simple structured passive mixer remains poor. In the present work, simple T‐type micromixer is modified with a circumferential in‐step at the entry of inlet channels to generate velocity components oblique to the mainstream inlet flow. The performance of T and T–T mixers with and without circumferential in‐step has been estimated for various Re (0 to 700). Results showed that inlet sample flow achieved velocity components of three‐dimensional nature with circumferential in‐step, leading to a momentous degree of intertwinement and entanglement of samples during the collision at the confluence of inlet channels. As a result, a remarkable improvement in mixing is obtained in the presence of in‐step for sufficiently higher flow rates of Re above 100 by T‐mixer and Re above 300 by T–T mixer. In particular, T‐mixer offers better advantage with in‐step compared to T–T mixer; marking an improvement for Re as low as 100 and above, as well as exhibiting shorter mixing lengths. Therefore, the present design of simple structured T‐mixer with in‐step at entry can be an effective device for various micromixing applications.
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