Passive Mixing and Concentration Tracking Using Scalars
The mixing of multiple streams of fluids in micro channels/chambers is of great importance in bio-analytical systems. Typically these processes need to occur within short mixing lengths and time scales. Passive micro-mixers make use of the geometry of the micro-channel to induce mixing. Shown here is a design variation where the liquid plus reagent side uses a passive scalar to show the mixing concentration. In this case, the two fluids had nearly identical viscosities but FLOW-3D is capable of modeling different viscosities and densities mixing as well.
Demonstration of a passive micro channel mixing process. The colors represent the concentration of the two different fluids (blue = Pure liquid, red = Liquid + Reagent).