Search Constraints

Start Over
Filtering by: Committee Member Deborah, Pence V. Remove constraint Committee Member: Deborah, Pence V.

Search Results

  • Effects of a thin, flexible nozzle on droplet formation and impingement

    Creator:
    Hawke, Shane R.
    Abstract:
    The droplet formation process in the vicinity of the nozzle exit and the behavior of a spreading droplet during impingement on a smooth glass surface were studied. Two nozzle geometries were tested. The first case was a stiff stainless steel nozzle plate 0.787 mm thick. The second case was a...
    Resource Type:
    Masters Thesis
    Full Text:
    research project. The author would also like to thank Dr. Deborah Pence, Dr. Vinod Narayanan, and Dr

  • Effect of PZT driving waveform and frequency on meniscus shape and dropon-demand droplet formation parameters

    Creator:
    Yang, Guozhong
    Abstract:
    For piezoelectric stack (PZT) driven droplet generator, the driving waveform and driving frequency effect on liquid filament shape and droplet characteristics have been experimentally studied. The experimental study was based on a PZT driven droplet generator with known geometric design parameters and working fluid properties. A lumped-element-model (LEM) constructed to...
    Resource Type:
    Dissertation
    Full Text:
    C E G J0 K L M P Q R Re St V We Z a c f NOMENCLATURE

  • Sustainable power management of microelectronics

    Creator:
    Muhtaroglu, Ali
    Abstract:
    The integration of renewable energy sources and the associated power electronics to notebook power and thermal management systems was investigated in this work. Both thermoelectric (TE) and photovoltaic (PV) energy extraction techniques were explored with the goal of achieving best sustainability. Semi-realistic usage assumptions were taken into account to evaluate...
    Resource Type:
    Dissertation
    Full Text:
    , Dr. Alan Wallace, Dr. Deborah Pence, Dr. Thomas Plant, Dr. Ted Brekken, and Dr. Hackleman, for

  • Numerical study of droplet formation with nozzle dynamics and multiple droplet impingement

    Creator:
    Sangplung, Saangrut
    Abstract:
    Droplet formation from a flexible nozzle plate driven by a prescribed-waveform excitation of a piezoelectric is numerically investigated using a computational fluid dynamics (CFD) model with the VOF method. The droplet generator with a flexible nozzle plate, which is free to vibrate due to the pressure acting on the plate,...
    Resource Type:
    Dissertation
    Full Text:
    graduate committee members: Dr. Solomon C. Yim, Dr. Deborah V. Pence, Dr. Vinod Narayanan, and Dr. Brain

  • Thermally actuated pumping of a single-phase fluid using surface asymmetry

    Creator:
    Jo, Myeong Chan
    Abstract:
    An experimental study of thermally actuated pumping of a single-phase, single-component fluid is presented in the context of thermal management of a heat source. The prominent feature of this pumping method is that the very heat that is to be removed from the heat source causes a net fluid motion....
    Resource Type:
    Masters Thesis
    Full Text:
    academic career development. I would also like to thank my thesis committee Dr. Deborah Pence, Dr

  • 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 research. I would also like to thank Dr. Deborah Pence and Dr. Vinod Narayanan for all of their

  • A study of adiabatic and diabatic flow boiling in parallel microchannels and fractal-like branching microchannels

    Creator:
    Daniels, Brian J.
    Abstract:
    A one-dimensional numerical model has been developed to study diabatic and adiabatic flow boiling in microchannels. This model accounts for developing flow effects and variable property effects. The model uses correlations for void fraction and two-phase multipliers found in the literature. The model has been used to study the performance...
    Resource Type:
    Dissertation
    Full Text:
    ................................................................... 31 V Comparison of calculated and published homogenous two-phase multipliers at two pressures

  • Numerical study of flow maldistribution in microchannels using fully resolved simulation

    Creator:
    Martin, Mathieu Georges Charles
    Abstract:
    This thesis addresses numerical simulation of flow maldistribution in microchannels. Microchannels are often associated with two phase-flows which can generate many problems such as plugging the channel or perturbing the flow. In this study we have used CFD and fully resolved technique to simulate what would happen in the case...
    Resource Type:
    Masters Thesis
    Full Text:
    : Sourabh V. Apte This thesis addresses numerical simulation of flow maldistribution in microchannels

  • 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:
    compression of vapor refrigerant (absorption at A, pumping at P, desorption at D, expansion at V

  • Modeling convective boiling flow with in-situ local vapor extraction

    Creator:
    Salakij, Saran
    Abstract:
    The pressure drop of convective boiling flow may be reduced by extracting vapor locally since the entire generated vapor does not have to travel through the entire channel length. In this study, the theoretical model was developed to simulate a convective boiling flow through a fractal-like branching microchannel network with...
    Resource Type:
    Masters Thesis
    Full Text:
    void fraction R Universal gas constant chα Channel aspect ratio R ext Extraction resistant vβ