This paper analyzes compressible gaseous flow through a three-dimensional straight uniform rectangular microchannel, and reports a set of asymptotic solutions. This work represents an extension of previous work on compressible flows through a two-dimensional microchannel. First, we choose the ratio of Dh/L as the small expansion parameter, where Dh and L are the channel’s hydrodynamic diameter ...

In this study, turbulent compressible gas flow in a rectangular micro-channel is numerically investigated. The gas flow assumed to be in the subsonic regime up to Mach number about 0.7. Five low and high Reynolds number RANS turbulence models are used for modeling the turbulent flow. Two types of mesh are generated depending on the employed turbulence model. The computations are performed for R...

The present work experimentally investigates the thermal effects of a synthetic jet actuator on the heat transfer performance of single-phase flow confined in a microchannel heat sink. The heat sink consisted of a single rectangular microchannel 500 μm wide, 300 μm deep and 26 mm long. Deionized water was employed as the cooling fluid. A synthetic jet actuator with a 100 μm diameter orifice was...

This paper outlines a novel approximate solution for determining the pressure drop of laminar, single-phase flow in slowly-varying microchannels of arbitrary cross-section. The proposed analysis is general and applicable to symmetric and asymmetric microchannel cross-sections, as examples compact relationships are reported for elliptical and rectangular shapes for three common wall profiles of ...

Microchannels typically have rectangular cross-sections, whereas biological channels, such as blood vessels and airways, circular cross-sections. The difference in cross-sections causes different fluidic behaviors, resulting differences between behavior microchannels channels. To simulate vitro, cross-sectional are required. We developed a microchannel with smooth channel wall, free from cracks...