Numerical investigation of laminar flow in symmetric and asymmetric complex T-channels for micro-mixing

A numerical investigation of the flow and mass transfer of Newtonian fluids in two T-micromixers was carried out using a finite volume code. One channel presents a symmetric flow configuration and the other an asymmetric configuration. The Reynolds number was varied between 0.05 and 100 and the Peclet number was varied between 5×10 and 5×10 for the asymmetric geometry and between 7.5×10 and 7.5×10 for the symmetric channel. To help assess the mixing efficiency in addition to the analysis of the contours of concentration of a scalar, an index was used to quantify the degree of mixing showing that the asymmetric geometry performed slightly better than the symmetric channel.