Active and passive micromixers: A comprehensive review

Overview of Innovative Technologies in Liquid‐Liquid Extraction Regarding Flexibility

“…There are several types of microfluidic extractors: microfluidic extractors with a membrane or with surface treated channels and micro mixer-settler units. For micro mixer-settler devices, the authors would like to recommend a new review with 205 references available by Bayareh et al [22]. The micro extractor consists of one channel for the feed and one channel for the solvent stream.…”

Monolithic 3D micromixer with an impeller for glass microfluidic systems

“…11,12 Therefore, numerous studies have attempted to enhance the mixing efficiency by fabricating short mixing channels for compact integration and simple, automated fluid manipulation. [12][13][14] Mixing channel platforms can be classified as passive mixers or active mixers depending on whether they require external power. Passive micromixers are composed of static components with no moving parts or power sources.…”

Understanding Interdependencies between Mechanical Velocity and Electrical Voltage in Electromagnetic Micromixers

“…Commonly, the mixing efficiency of micromixers is analysed by mixing parameters such as time, length, and the mixing index [ 18 , 19 ], and these parameters depend on the ability of the transducer system (which includes the energy source, transducers, and membrane/transmission materials). To optimise transducer efficiency, there are generally a few approaches.…”

“…To optimise transducer efficiency, there are generally a few approaches. As a theoretical approach, system modelling is performed for numerical simulations using various software such as ANSYS/CFX, FLUENT, and COMSOL Multiphysics or written codes, for instance the lattice Boltzmann technique [ 18 ]. The computing simulation is critical to estimating and optimizing all mixing parameters, especially for the experiments’ initial conditions.…”

“…Although mixing parameters based on the experiment would predict a sufficiently accurate result, dead zones may exist; the image-based tracer analysis can be a suitable method for ascertaining the degree of mixing. External image monitoring devices can be considered as add-ons to support mixing efficiency analysis; however, it adds costs to the system installation [ 16 , 18 ]. Moreover, more trial and error are required to optimise both the transducer and the mixing system together.…”