A detailed numerical simulation of forced convection heat transfer occurring in silicon-based microchannel heat sinks has been conducted using a simplified three-dimensional conjugate heat transfer model (2D fluid flow and 3D heat transfer). The micro-heat sink model consists of a 10 mm long silicon substrate, with rectangular microchannels, 57 lm wide and 180 lm deep, fabricated along the enti...

The lack of personal particulate matter (PM) monitoring technique hinders the knowledge negative health impacts caused by inhaling PM. Acoustophoresis has a potential to produce miniature particle sorters that can be carried inside human’s breath zone. Micron particles manipulated Acoustic Radiation Force (ARF), but sub-micron hardly directed due Streaming Effect (ASE). purpose this study is ex...

In a recent study, an effective means of mixing a low Reynolds number pressure-driven flow in a micro-channel was reported by Stroock et al.[10] using trenches on the lower wall that form a staggered herringbone pattern. In the present work numerical results are reported that indicate enhanced mixing using a similar herringbone pattern in the context of an electroosmotically driven flow in micr...

In this study, a numerical approach was carried out to analyze the effects of different geometries microchannel heat sinks on forced convective transfer in single-phase flow. The simulations were performed using commercially available software COMSOLMultiphysics 5.6® (Burlington, MA, USA) and its results compared with those obtained from experimental tests polydimethylsiloxane (PDMS). Distilled...

Abstract. In this paper, a Cascaded Lattice Boltzmann Method with second order slip boundary conditions is developed to study gas flows in a microchannel in the slip and transition flow regimes with a wide range of Knudsen numbers. For the first time the effect of wall confinement is considered on the effective mean free path of the gas molecules using a function with nonconstant Bosanquet para...

Microchannel heat sinks are very widely used due to their high transfer coefficients and low refrigerant requirements. Nevertheless, microchannel still perform sub-optimally when it comes thermal performance. Therefore, this paper investigates the individual combined impacts of different characteristics porous media on performance microchannel. Four porosity values considered: 0.8, 0.85, 0.9, 0...