A numerical study and parameter optimization was carried out to find the effects of geometric parameters nanofluid concentration on heat transfer pressure drop characteristics a finned microchannel. Six dual rectangular fins with different layouts were placed in single microchannel having cross section. The hydraulic diameter kept constant length, width angle fin between horizontal axes determi...

Abstract To improve the heat transfer performance of microchannels, a novel microchannel embedded with connected grooves crossing two sidewalls and bottom surface (type A) was designed. A comparative study conducted regarding performances type microchannels on their (including types B C), or D) as well smooth rectangular E) via three-dimensional numerical simulation experimental validation (at ...

In this work, the effects of electrical double layer (EDL) near the solid/ liquid interface, on three dimensional heat transfer characteristic and pressure drop of water flow through a rectangular microchannel numerically are investigated. An additional body force originating from the existence of EDL is considered to modify the conventional Navier-stokes and energy equations. These modified eq...

A series of experiments are presented which study the flow kinematics of water past drag-reducing superhydrophobic surfaces. The ultrahydrophobic surfaces are fabricated from silicon wafers using photolithography and are designed to incorporate precise patterns of micrometer-sized ridges aligned in the flow direction. The ridges are made hydrophobic through a chemical reaction with an organosil...

We have applied particle tracking techniques to obtain spatially resolved velocity measurements in electrokinetic flow devices. Both micrometer-resolution particle image velocimetry (micro-PMV) and particle tracking velocimetry (PTV) techniques have been used to quantify and study flow phenomena in electrokinetic systems applicable to microfluidic bioanalytical devices. To make the flow measure...

A scheme is presented to actively control particulate position in inertial microfluidics. The unilateral slip boundary applied regulate the velocity distribution of flow field microchannel, thus vertical equilibrium particle can be changed with length. Three kinds typical particles, namely circular, elliptical, and rectangular, are simulated. results demonstrate that positions manipulated withi...