Assembled nanofin heat sinks, nanostructures which are formed via external forces in a cooling microfluidic to remove heat from hot spots, are a new concept that has recently been introduced. In this work, we investigate nanofin structures formed by CrO2 and Fe2O3 magnetic nanoparticles and compare their performance. Thermal imaging is used for comparison of three cases including: (i) DI water ...

Vapor-venting microchannel heat exchangers are promising because they address the problems of high pressure drop, flow instability, and local dryout that are common in conventional two-phase microchannel heat sinks. We present a 3D numerical simulation of the vapor-venting process in a rectangular microchannel bounded on one side by a hydrophobic porous membrane for phase-separation. The simula...

Aluminum alloys, which serve as heat sink in light-emitting diode (LED) lighting, are often inherent with a high thermal conductivity, but poor thermal total emissivity. Thus, high emissive coatings on the Al substrate can enhance the thermal dissipation efficiency of radiation. In this study, the ultrasonic mechanical coating and armoring (UMCA) technique was used to insert various ceramic com...

A novel microfabrication technique was developed to create silicon nanowires (SiNWs) on orthogonal surfaces of microchannels machined on top of a silicon wafer. Using a two-step metal-assisted etching process, the SiNW for the first time could be selectively fabricated on two different crystalline directions—the channel top and bottom surfaces oriented in the (1 0 0) direction while the sidewal...

As much as two-phase mixture models resolve more physics than single-phase homogeneous models, their inconsistent heat transfer predictions have limited use in modelling nanofluid cooled minichannel sinks. This work investigates, addresses, and solves this key shortcoming, enabling reliable physically sound of nanoflows, using the model. It does so by applying model to a nine-passages rectangul...

INTRODUCTION Biorefineries can be built as stand-alone systems or co-located with existing systems such as industrial plants or district heating systems. There are different criteria for selecting a suitable location for a biorefinery, for example closeness to raw material, product markets and heat sinks and sources or existing experiences and know-how. Further, the entire upgrading process fro...

14 15 16 [plus additional co-authors that will be named at the time of submission to the journal] 17 2 Abstract 18 In Fall et al, 2011, results from the recently concluded Surface Stations Project surveying 19 the U.S. Historical Climatology Network (USHCN) were presented, using a siting 20 classification system developed by Michel Leroy for Meteofrance in 1999, and employed 21 system to introd...