Investigation of slip boundary conditions in the T-shaped microchannel

•We studied flow and mixing in a T-type micromixer at high Reynolds numbers.•The Reynolds number was varied from 1 to 1000.•Investigated the slip and non-slip boundary conditions on the channel walls.•It was shown that by using the hydrophobic coating can be controlled by mixing. Flow regimes and mixing performance in a T-type micromixer at high Reynolds numbers were studied by numerical solution of the Navier–Stokes equations. The Reynolds number was varied from 1 to 1000. The cross section of the mixing channel was 100μm×200μm, and its length was 1400μm. The transverse inlet channels were symmetric about the mixing channel, and their cross-section was 100μm×100μm, and the total length was 800μm. Five different flow regimes were identified: (i) stationary vortex-free flow (Re