In this study, extraction of tannic acid using microchannel was investigated. Affective parameters were optimized. Different solvents including buthanol, ethylacetate and n-hexane as organic phase, methanol, propanol, ethanol and water as aqueous phase investigated. Microchannels with different confluence angles and diameters were examined. Microchannels with different confluence angles and dia...

The paper describes the fabrication and chemical applications of polymer microchannel chips, with special reference to in situ observations of the chemical/physical processes occurring in polystyrene microchannel chips, including those in microchannel-microelectrode/microheater chips. On the basis of absorption/fluorescence microspectroscopy and microelectrochemistry techniques, we show some ch...

We used inclined lithography to fabricate a pneumatic microvalve for tall microchannels such as those used to convey large cells. The pneumatic microvalve consists of three layers. The upper layer is the actual liquid microchannel, which has a parallelogram-shaped cross section of width 500 μm, height 100 μm, and an acute angle of 53.6◦. The lower layer is a pneumatic microchannel that function...

Three-dimensional simulations of the single-phase laminar flow and forced convective heat transfer of water in microchannels with small rectangular sections having specific hydraulic diameters and distinct geometric configurations were investigated numerically. The numerical results indicated that the laminar heat transfer was to be dependent upon the aspect ratio and the ratio of the hydraulic...

the fluid flow and heat transfer in a three-dimensional microchannel filled with al2o3- water nanofluid is numerically investigated. the hybrid scheme is used to discretize the convection terms and simpler algorithm is adopted to couple the velocity and pressure field in the momentum equations. the temperature fields, variation of horizontal velocity along the centre line of the channel, averag...

In this paper, we report spatial distribution of laminar flow-assisted dendritic amplification (LFDA) product. LFDA is a recently invented signal amplification method dedicated to biomolecular binding events on microchannel walls. Onto the bound biomolecule, a dendritic structure is constructed by supplying two building blocks from laminar streams produced by a Y-shaped microchannel. In view of...

In this study, high-fidelity conjugate heat transfer simulations are used to model a micro-channel exchanger (MCHE) in crossflow study its thermal-hydraulic performance. Three different microchannel geometries, namely circular, triangular, and square with louver-shaped fins, considered. The local flow field showed strong coupling between the flow, solid domain, crossflow. separation wake region...

A disposable on-chip whole blood/plasma separator, which is able to separate plasma from whole blood by capillary movement through a bead-packed microchannel, has been designed, fabricated and characterized in this work. Various sized silica beads were packed inside a microchannel using a slurry-bump pattern that prevented the beads from passing through the microchannel. The bead-packed microch...

The model results for the velocity field of the herringbone microchannel (Figure 1) indicate that the velocity of the fluid within the herringbone was significantly lower than the 10 velocity in the base microchannel. The velocity profile in the base microchannel closely resembles the parabolic velocity profile in the straight microchannel. However, unlike the uni-directional parabolic velocity...