Search Constraints

Start Over
Filtering by: Creator Dale, A. C. Remove constraint Creator: Dale, A. C. Advisor Liburdy, James A. Remove constraint Advisor: Liburdy, James A. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

Search Results

  • The experimental characterization of membrane behavior in two-phase gas extraction

    Creator:
    Cappello, Nicholas C.
    Abstract:
    Understanding the behavior of hydrophobic membranes is important for applications where separating a gas from a liquid-gas mixture is beneficial. For example, in-situ vapor extraction can be used in microscale heat sinks to improve heat transfer and flow stability. In this study, gas is experimentally evaluated flowing through flexible polytetrafluoroethylene...
    Resource Type:
    Masters Thesis
    Full Text:
    a function of pressure: (a) ex- ponential curve fit of the form Eq. (6.5) with C = 7 and n = 0.4 (b

  • 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:
    ................................................................................43 5.12 Flow characteristics: (a) droplet volume, (b) velocity, and (c) break-off time versus σ

  • Effect of Active Trailing Edge Motion Upon Airfoil Energy Harvester

    Creator:
    Strahl, Jordan D.
    Abstract:
    The application of a flapping foil with prescribed trailing edge motion to energy harvesting in a low reduced frequency (k = fc/U∞) regime was experimentally studied. The effects of the phase and amplitude of the applied trailing edge motion upon time-variant power extraction capability have been measured and are interpreted....
    Resource Type:
    Masters Thesis
    Full Text:
    design used was NACA0015 in profile with a chord length of c = 150mm, the pitching axis located at the 1

  • 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:
    6, 2008. Title: Characterization of Flow Boiling in a Fractal-Like Branching Microchannel Network

  • 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:
    presented on September 10, 2008. Title: A Study of Adiabatic and Diabatic Flow Boiling in Parallel

  • Vortical Structures in Transition to Turbulence through Randomly Packed Porous Media: Scale, Energy, and Mixing Characteristics

    Creator:
    Mohammadi Ziazi, Reza
    Abstract:
    Vortical structures are the driving mechanism of transition to turbulence in porous media requiring adequately resolved observations along with analysis of the scale and energy of flow within the pores. Of specific interest is to understand the vortex dynamics, energy, and turbulent mixing and transport properties in the scale of...
    Resource Type:
    Dissertation
    Full Text:
    all six cases of Figure 4.3. (a) Plane PL-1 at Rep = 100, (b) Plane PL-3 at Rep = 272, (c) Plane PL-4

  • Interactions of a fully modulated inclined jet with a crossflow

    Creator:
    Dano, Bertrand P. E.
    Abstract:
    Jets in crossflow are used in a wide range of engineering applications and have been studied for more than 60 years. The transversal penetration and structure of a jet placed in a crossflow is known to be strongly three-dimensional. It is believed that, by using a pulsed jet inclined in...
    Resource Type:
    Dissertation
    Full Text:
    downstream of the jet was similar to the one found behind a solid 5 Shear Layer Vortices C rossfl ow

  • A study of the characteristics of oscillatory surface instabilities leading to droplet formation

    Creator:
    Daniels, Brian J.
    Abstract:
    The characteristics of the free surface in an orifice driven by a periodic forcing function have been studied both theoretically and experimentally. In the theoretical study, two wall boundary condition cases were examined: 1) the radial velocity at the wall of the orifice is zero; and 2) the axial velocity...
    Resource Type:
    Masters Thesis
    Full Text:
    ; 51Horizontal Pixel Numbers a) 500, b) 650, and c) 800 10 Detail View of Intensity Profiles of Pixel Columns in

  • Study of Energy Harvesting Performance of Oscillating Airfoils using a Discrete Vortex Model

    Creator:
    Kamrani Fard, Kiana
    Abstract:
    The energy harvesting performance of oscillating airfoils is studied using a discrete vortex model (DVM) with a leading-edge separation criterion. The airfoil undergoes a combined sinusoidal heaving and pitching motion at reduced frequencies of k = 0.06 − 0.16, with heaving amplitude of h0 = 0.5c, and pitching amplitude of...
    Resource Type:
    Dissertation
    Full Text:
    . . . . . . . . . . . . 30 2.7 Relative shear velocity, USL/U∞, versus t/T shown in (a) and (c), and versus t/τv shown in (b

  • A numerical model of drop-on demand droplet formation from a vibrating nozzle and a rigid nozzle

    Creator:
    Yang, Guozhong
    Abstract:
    Droplet formation from a rigid and a vibration nozzle driven by a pulsing pressure is simulated. Droplet formation is simulated by using one-dimensional model. For the case of droplet formation from a vibration nozzle, the nozzle vibration is simulated by large deflection plate vibration equation. Droplet formation from a rigid...
    Resource Type:
    Masters Thesis
    Full Text:
    different pressure inputs; all units are nondimensionalized by the capillary scales; (a) P =2.5, (b) P*=5,(c