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Showing 1 to 20 of 193 for “"Microchannels"”.
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Quantification of Mixing in Microchannels
Microchannels are used for delivery of two-or more fluids for multiple purposes, such as drug delivery, where good mixing is desired in a very short time (or distance). For this purpose, many design options are being proposed in the literature. For example herringbone baffles at the bottom of a …
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Electrochemistry and Electrokinetics in Microchannels
The main body of this work considers the design and development of a microfluidic, continuous electrochemical sensor capable of measuring accurate potential differences. The key challenge in creating such a device is the implementation of a miniaturized reference electrode and salt bridge. The …
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Oscillatory and streaming flows in microchannels
This Thesis was approved for publication on 2019-12-03 at 10:21.
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Characterization of Two -Phase Flow in Microchannels
… of void fraction and frictional pressure drop in microchannels. A flow visualization analysis is another important goal for two-phase flow behavior understanding and experimental analysis. Experiments were performed with a 6-port and a 14-port microchannel with hydraulic diameters of 1.54 mm and …
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Instability of flow boiling in parallel microchannels
… operational parameters can become challenging. Microchannels are characterized by a large ratio of surface area to fluid volume, and rapid growth of bubbles in a confined space causes flow parameter oscillations. Fluctuations in pressure, pressure drop, temperature and mass flux can be triggered …
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Thermally Developing Electro-Osmotic Convection in Circular Microchannels
<p>Thermally developing, electro-osmotically generated flow has been analyzed for a circular microtube under imposed constant wall temperature (CWT) and constant wall heat flux (CHF) boundary conditions. Established by a voltage potential gradient along the length of the microtube, the …
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Forced Convection in Microchannels with Nanostructures on One Wall
… in this study. The device consists of silicon microchannels on whose bottom surfaces multi-walled carbon nanotubes are grown. The objective of the study is to investigate the effect of carbon nanotubes on the heat transfer characteristics. The heat sink size is 15 mm by 15 mm by 0.675 mm. It …
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Contraction/expansion flow of dilute elastic solutions in microchannels
An experimental study is conducted on the nature of extensional flows of mobile dilute polymer solutions in microchannel. By observing such fluids on the microscale it is possible to generate large strain rates ([approximately] 50,000 s⁻¹) that are greater than values which have been observed in …
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On-Chip Isotropic Microchannels for Cooling Three Dimensional Microprocessors
… of three dimensionally independent on-chip microchannels using a CMOS-compatible single mask deep reactive ion etching (DRIE) process for cooling 3D ICs. Three dimensionally independent microchannels are fabricated by utilizing the RIE lag effect. This allows complex microchannel …
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Modeling Two-Phase Flow and Heat Transfer in Polygonal Microchannels
… we study the motion of long drops in rectangular microchannels at low capillary numbers. As the drop moves it deposits a thin liquid film on the sidewalls of the microchannel. The drag on the drop comes mainly from the shear force exerted by the wall on the thin films surrounding the drop. The …
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Micro-Evaporator Design and Investigation of Phase Change in Tailored Microchannels
Microchannels show promising potential for implementation in next generation high heat flux cooling schemes. Promising research has been conducted in the area of MEMS cooling devices, taking advantage of the increased heat transfer characteristics in microfabricated structures. While significant …
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Development of photo-patterned composite structures in microchannels for oil reservoir research
Starting from unstructured glass microchannels, we develop a new method of micromodel fabrication. We build composite structures in a bottom-up manner with ultraviolet projection lithography where the composite structures are composed of tricyclodecane dimethanol diacrylate and stearic-acid treated …
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