A microfluidic microarray that is created in the double spiral format has produced a greater density of probes than in our previous report. Using this double-spiral format together with centrifugal pumping for liquid delivery, 384 x 384 hybridization assays have been performed on one circular disk at one time, at the intersections between the spiral channels and spiral probe lines. Each sample ...

The burner-type regeneration diesel particulate filter is one of the most widely used filters. Using AVL FIRE, a 3D model (DPF) was established, and simulation analyses were carried out. effects exhaust parameters (temperature, mass flow rate, soot load) structural (channel density, inlet/outlet channel ratio, length–diameter ratio) on distribution (soot concentration thickness) analyzed. resul...

Abstract Accurate control of mixing between two fluids is a fundamental aspect in many applications and generally implies the use small devices operating at low velocities. This often achieved using micromixers which, due to combination dimensions velocities, work laminar regime process very limited flow rates. The rates can be increased more mixers same time. In this respect it appealing sever...

A method to obtain the local heat transfer coefficients of carbon dioxide at supercritical pressures in vertical multi-port mini-channels and in a vertical small tube under cooling conditions was presented through the combination of experiments and numerical simulation in this paper. The CFD code FLUENT 6.1 was used to simulate the convection heat transfer of cooling water to determine the loca...

The pumping mechanism in multi-inlet microfluidic channels usually requires multiple micropumps to be separately attached each inlet. Unfortunately, this may create fluid leakage resulting from a considerably high internal pressure. To address this, passive sub-atmospheric pressure-inducing micropump is proposed and its performance characterized as function of the flow rate gauge With pump, suf...

The Reynolds number effect induced by model scaling and inflow conditions will affect the aerodynamic starting characteristics of a two-dimensional hypersonic inlet. This is investigated through numerical simulation method. First, method validated experimental data. static pressure from agreed well with wind tunnel tests. Then, this used to study on inlet caused conditions. results indicate tha...

a numerical model is developed to simulate the transport phenomena in the flow channel between parallel plates with porous and non-porous (or impermeable) walls. the continuity and momentum equations were solved first, assuming the wall reynolds number in the range of with the suction or injection of air at a speed equal to the uniform inlet velocity. the results show that at constant inlet and...

The small vortex generation is a key issue of the mechanism for late flow transition and turbulence generation. It was widely accepted that small length vortices were generated by large vortex breakdown. According to our recent DNS, we find that the hairpin vortex structure is very stable and never breaks down to small pieces. On the other hand, we recognize that there are strong positive spike...