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Filtering by: Creator González-Hernández, M. P. Remove constraint Creator: González-Hernández, M. P. License All rights reserved Remove constraint License: All rights reserved Subject Microfluidics Remove constraint Subject: Microfluidics

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  • From electrophoresis to dielectrophoresis: designing, fabricating, and evaluating an electroformed ratchet type microfluidic dielectrophoresis device

    Creator:
    Gonzalez, Carlos F.
    Abstract:
    Dielectrophoresis (DEP) is a separation method in which a non-uniform electric field is used to induce a dipole moment in a suspended particle. If the polarization of the particle is greater than that of the suspending medium, the particle will move towards the region of higher field strength (positive DEP);...
    Resource Type:
    Dissertation
    Full Text:
    ) where εp∗ and εm* are the complex permittivity of the particle and medium respectively, and ε*= ε-jσ/ω

  • A technique for spatially resolved wall temperature measurements in microchannel heat sinks using infrared thermography

    Creator:
    Krebs, Daniel P.
    Abstract:
    A non-intrusive measurement technique for direct quantitative thermal visualization of channel wall temperatures in two phase microchannel flows using infrared thermography (IRT) is presented. Specifically, the measurement of top channel wall temperatures in a fractal-like branching microchannel silicon heat sink during flow boiling is demonstrated and thoroughly documented. Obtaining quantitative...
    Resource Type:
    Masters Thesis
    Full Text:
    FLYLEAF AN ABSTRACT OF THE THESIS OF Daniel P

  • Characterization of flow boiling in a fractal–like branching microchannel network

    Creator:
    Edward, Lee M.
    Abstract:
    Based on experimental investigations the present study evaluates flow instability and void fraction in a fractal-like branching microchannel network with rectangular cross-section. The hydraulic diameter of the channels ranged from 308μm at the inlet to 143μm at the outlet. The flow network used is characterized by set branching ratios for...
    Resource Type:
    Masters Thesis
    Full Text:
    OF Lee M. Edward for the degree of Master of Science in Mechanical Engineering presented on June

  • Development of a microchannel device for adsorption cooling application

    Creator:
    Asumpinpong, Kasidid
    Abstract:
    Single-layer and three-layer microchannel adsorption devices were fabricated by procedure that was newly developed. Aluminum was chosen for metal housing while the adsorption pair was silica gel and water. Each adsorption layer contained two layers of 250 μm-thick silica gel. Both silica gel layers opened to the same layer of...
    Resource Type:
    Masters Thesis
    Full Text:
    ……………... 90 Appendix E - Matlab Source Code ………………………………….. 91 Main M-File …………………………………………………… 91 ODE

  • Application of controlled thermal expansion in diffusion bonding for the high-volume microlamination of MECS devices

    Creator:
    Pluess, Christoph
    Abstract:
    Diffusion bonding has been widely used within microlamination architectures for the fabrication of Micro Energy and Chemical Systems (MECS). MECS are microsystems with the ability to process bulk amounts of fluid within highly-parallel microchannel arrays capable of accelerated heat and mass transfer. Thus far, diffusion bonding of the microchannel arrays...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members Dr. Sundar V. Atre, Dr. Kevin M. Drost, Dr. Timothy C. Kennedy and Dr. Zhaohui Wu for

  • Study of a constrained-film bubble absorber under cycle operating conditions

    Creator:
    Cardenas, Ruander
    Abstract:
    An experimental and numerical study of absorption of ammonia vapor bubbles into a constrained thin film of ammonia-water solution is presented in the context of a potential reduction in size of a heat-actuated heat pump component. A large-aspect-ratio channel with a depth of 600 µm restricts the thickness of the...
    Resource Type:
    Masters Thesis
    Full Text:
    laminar m mass transfer, mixture max maximum min minimum P precision p porous TP two-phase

  • Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

    Creator:
    Kwak, Younghoon
    Abstract:
    Two-phase gas-liquid flows in microscale fractal-like branching channel flow networks were experimentally studied to assess the validity of existing void fraction correlations and flow regimes based on superficial gas and liquid velocities. Void fractions were assessed using two different methods. First, void fraction data were acquired using a High-Speed-High-Resolution (HSHR)...
    Resource Type:
    Dissertation
    Full Text:
    superficial air and water velocities through the same branch level between 0.007 m/s and 1.8 m/s and between

  • Application of infrared thermography for temperature measurement in microscale internal and external flows

    Creator:
    Patil, Vishal
    Abstract:
    Infrared (IR) thermography is applied to estimate heat transfer rates in external and internal microscale convective flows. The technique and analysis are developed in the context of external jet impingement flow and internal single-phase liquid flows. A heated-thin-foil thermography technique is applied to perform surface temperature visualization on a submerged...
    Resource Type:
    Masters Thesis
    Full Text:
    Comparison Of NUav for a 5OO-tm- diameter jet impingement with Martin's correlation (H/D =2; D = 500 m; Re

  • Flow induced mixing in high aspect ratio microchannels

    Creator:
    Siripoorikan, Bunchong
    Abstract:
    Micro-fluid mixing is an important aspect of many of the various micro-fluidic systems used in biochemical production, biomedical industries, micro-energy systems and some electronic devices. Typically, because of size constraints and laminar flow conditions, different fluids may only have the opportunity to mix by diffusion, which is extremely rate limited....
    Resource Type:
    Masters Thesis
    Full Text:
    APPENDIX C. DATA ANALYSIS PROGRAM ................... 100 APPENDIX D. STEP AND EXAMPLE OF P-VALUE

  • Fabrication and application of polymer based microfluidic devices

    Creator:
    Koesdjojo, Myra T.
    Abstract:
    The concept of reducing laboratory operations in scale such that they fit on a microfluidic chip has been met with great enthusiasm. Lab-on-a-chip devices promise to be cost effective to operate due to reduced reagent consumption, have the potential to offer shorter analysis times due to their short path lengths,...
    Resource Type:
    Dissertation
    Full Text:
    CONTENTS (Continued) Page 2 . T W O - S T A G E P O L Y M E R E M B O S S I N G O