Shin-ichiro KAWASAKI*, Yuichiro WAKASHIMA, Akira SUZUKI, Kiwamu SUE, Yukiya HAKUTA, and Kunio ARAI a Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai, Miyagi, 983-8551, JAPAN. Fax +81-22-237-5224, E-mail [email protected] b Department of Applied Molecular Chemistry, College of...

The present numerical work deals with the optimization of micro-channel heat sink using irreversibility analysis. nanofluid Al2O3-water different nanoparticles concentration and temperature-dependent property is chosen as a coolant. flow considered fully developed, steady, laminar in constant cross-section circular channels. Navier-Stokes energy equations are solved for single-phase total mass ...

This study explores hydrodynamic instability and pressure drop in a water-cooled two-phase micro-channel heat sink containing 21 parallel 231 713 lm micro-channels. Two types of two-phase hydrodynamic instability were identified: severe pressure drop oscillation and mild parallel channel instability. It is shown the severe pressure drop oscillation, which can trigger pre-mature critical heat fl...

In this study, microelectro-discharge (micro-ED) milling of nonconductive ZrO2ceramicsis investigated using a Cu tool electrode in kerosene dielectric. An adhesive Cu foil is firmly attached on the workpiece to initiate the sparks. After the machining of Cu foil, an electrically conductive carbonic layer is formed on the ceramic workpiece disassociating the kerosene dielectric, which allows mic...

Understanding the flow fields at the micro-scale is a key to develop methods of successfully mixing fluids for micro-scale applications. This paper investigates flow characteristics and mixing of three different geometries in micro-channel. A Circular groove micro mixer has been designed and simulated. One such channel is shown in Figure1. The geometry of the channels taken was rectangular with...

A new hybrid cooling scheme is proposed for high-flux thermal management of electronic and power devices. This scheme combines the cooling benefits of micro-channel flow and micro-jet impingement with those of indirect refrigeration cooling. Experiments were performed to assess single-phase cooling performance using HFE 7100 as working fluid. Excellent predictions were achieved using the standa...

We experimentally demonstrate cascaded silicon micro-ring modulators as the key component of a WDM interconnection system. We show clean eye-diagrams when each of the four micro-ring modulators is modulated at 4 Gbit/s. We show that optical inter-channel crosstalk is negligible with 1.3-nm channel spacing.

High quality PIV experiments in micro-channel flow geometries to get detailed and accurate flow measurements can be difficult and involves paying attention to a variety of aspects. In the experiments, the reasons could be ranging from uncontrolled transients in the fluidic flows systems to fouling of the microchannels by impurities, bubbles, the seed particles themselves. Another factor which c...