mixing – TechConnect Briefs

NETZSCH Nanotechnology Advancements and Applications

Miranda S., Smith R., NETZSCH Premier Technologies, US

Size reduction into the nanometer size range offers many advantages. These include increased surface area, improved reactivity, efficient absorption and higher efficacy of active ingredients. This presentation will discuss methods for Comminution and dispersion of [...]

Electrothermal blinking vortices for chaotic mixing

Kauffmann P., Loire S., Mezic I., UCSB, US

At microscale, an efficient mixing is a keystep which dramatically accelerates bio-reactions. This paper presents an experimental and theoretical study of electrothermal chaotic mixing. To do so, asymmetric vortices are blinked to perform time dependant [...]

Experimental and numerical investigations of the influence of fluid dynamics on the precipitation of nanoscaled particles

Gradl J., Peukert W., Friedrich-Alexander-University of Erlangen-Nuremberg, DE

Precipitation depends on competing kinetics of various interacting parallel and subsequent steps. These are mixing, chemical reactions, nucleation, growth, aggregation and stabilization. The coupling of all subprocesses is the key for predicting the PSD. In [...]

Methods of energizing micro flows by acoustic and electric fields

Schönfeld F., Dadic D., Hardt S., Püschl R., Schmitz F., Institut für Mikrotechnik Mainz –(IMM), DE

We present two different concepts for energizing (e.g. mixing, pumping) of micro flows, which rely on the coupling of acoustic and electromagnetic energy into a liquid. Both concepts are analyzed using computational fluid dynamics (CFD) [...]

A study on the novel micromixer with chaotic flow

Lee S-H., Kang H.J., Choi B.K., Sogang University, KR

We design that a fluid was rotated by a coupling between Lorentz force and a moving force of a electric charge in an electric field. And it generate barrier embedded chaotic flow to use mass [...]

Playing with actuators in microfluidic systems

Tabeling P., Barbier V., Goulpeau J., Lonetti B., Willaime H., ESPCI, FR

In the lab-on a chips of the future, flows will be handled at the microscale through mazes of microchannels. For such systems, it will be crucial to integrate a number of actuators on the chip [...]

Shape Oscillation and Internal Mixing in Sessile Liquid Drops using ElectroWetting-On-Dielectric (EWOD)

Miraghaie R., Sterling J.D., Nadim A., Keck Graduate Institute, US

We show that internal mixing within a sessile liquid drop can be significantly enhanced by means of so-called electrowetting-on-dielectric (EWOD), using an alternating electric potential. This is done experimentally by comparing the coalescence and mixing [...]

Microchannel Mixing, Entropy and Multifractals

Kaufman M., Camesasca M., Manas-Zloczower I., Cleveland State University, US

Microfluidic systems operate in a pressure driven flow regime with no moving parts to drag the fluids. Our research aims at developing rigorous assessment and quantification tools of mixing in microchannels. The tools are based [...]

Coin-Shaped Reactor in Microfluidic Devices Used for Radiopharmaceutical Synthesis

Elizarov A.M., Kolb H.C., van Dam R.M., Heath J.R., Padgett H.C., Huang J., Daridon A., California Institute of Technology, US

A microfluidic device designed and optimized for the multi-step synthesis of PET (Positron Emisssion Tomography) probes is presented. It is the first device in its class to produce radiopharmaceuticals of sufficient quality and quantity (over [...]

Infinitely fast reactions in micromixers

Gleeson J.P., University College Cork, Ireland, IE

Efficient mixing to promote chemical reactions is extremely desirable in lab-on-a-chip microfluidic devices, but is difficult to achieve in the typical low Reynolds-number flows. Numerical simulation of the high Peclet-number case common in microfluidics is [...]