Advanced Materials & Manufacturing – Page 608

An Effective Passive Micromixer Employing Herringbone Structure

Kung C-F, Chen C-F, Chu C-C, Tseng F-G, IAM, National Taiwan University, TW

This paper proposes a high efficient micro mixer, passively employing surface tension force as driving power and Herringbone structures as vortex generator for fluid mixing. The fluidic channel was designed without sidewall and confined with [...]

Analysis of AC-Driven Electroosmotic Flow in a Microchannel Packed with Microspheres

Kang Y.J., Yang C., Huang X.Y., Nanyang Technological University, SG

This paper presents a theoretical study on the AC-driven electroosmotic flow in both open and closed cylindrical microchannels packed with uniform microspheres. The time-periodic oscillating electroosmotic flow in an open microchannel in response to the [...]

Droplet Movement Induced by Nano Assembled Molecules And Micro Textures

Tseng F-G, Chien S.C., National Tsing Hua University, ESS Dept., TW

This paper introduces a droplet movement method on top of a surface prepared by gradient nano-scale self-assembled molecules on micro sized textures. Experimental results demonstrate the contact angles on hydrophobic surfaces without/with micro posts increase [...]

Optimization of Mixing in an Active Micromixing Device

Mathew G., Mezic I., Serban R., Petzold L., university of california, santa barbara, US

Microscale mixers can be divided into two broad classifications - passive and active. Passive mixers rely on geometric properties of the channel shape whereas active mixers rely on time-dependent perturbation of the fluid flow to [...]

Spacific Flow Control Systems Using IR Laser Induced Sol-Gel Transfer of Hydrogel

Tanaka J., Shirasaki Y., Tatsuoka M., Funatsu T., Watabe S., Shoji S., Edura T., Mizuno J., Wada Y., Waseda University, JP

High efficient IR laser induced sol-gel transfer of hydrogel is applied for the microfluidic systems. High performance biomolecules sorting systems using T-shaped microchannel including IR absorbers were realized. By using Mebiol GelTM as the carrier, [...]

SOI Processing of a Ring Electrokinetic Chaotic Micromixer

Zhang Y.T., Chen H., Mezic I., Meinhart C.D., Petzold L., MacDonald N.C., university of california, santa barbara, US

Micromixing has been an active research area in the past decade due to the rapid expanding application of the lab-on-a-chip system in life science. Using the silicon bulk micromachining technology, a ring electroosmotic micromixer, which [...]

Flow Simulation of a Microfluidic Analog of the Four-Roll Mill

Phelan_Jr. F.R., Hudson S.D., NIST, US

The fluid dynamics of geometries for liquid state materials characterization in microfluidic devices are investigated. A pressure driven device using microchannels is sought that has an adjustable flow type, approximating the function of the four-roll [...]

Electrokinetic Instability Mechanism of Double-layered Miscible Fluids with Different Electrolyte Concentrations in DC Electric Field

Park J.W., Kang K.H., Huh K.Y., Pohang University of Science and Technology, KR

Interfacial instability has recently been observed for DC-powered electroosmotic flow by Chen and Santiago [1]. So far, no plausible explanation has yet been made since the phenomenon is contrary to common belief of laminar flow [...]

Polymeric Micropump with SU-8 Check Valves Assembled by Lamination Technique

Truong T-Q, Nguyen N-T., Nanyang Technological University, SG

This paper presents the first micropumps assembled using polymeric lamination technology. Each pump consists of two 100-m-thick, 10-mm-diameter SU-8 discs; two 1.5-mm-thick, 15-mm-diameter polymethylmethacrylate (PMMA) discs; and one piezo disc. The SU-8 parts were fabricated [...]

Analysis of Blood Extraction from a Lancet Puncture

Kuriger R.J., Romanowicz B.F., CFD Research Corporation, US

A computational model was created utilizing the CFD-ACE+ software to model blood flow from a lancet puncture of the skin. A two-dimensional axisymmetric model was developed and the skin tissue was modeled as a porous [...]