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Filtering by: Creator Brewster, C. S. Remove constraint Creator: Brewster, C. S. Committee Member Pence, Deborah Remove constraint Committee Member: Pence, Deborah Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Modeling of Non-Spherical Particle Dynamics in a Non-Uniform Flow

    Creator:
    Alshehri, Ahmad S.
    Abstract:
    Turbulent flow with suspended, non-spherical particles can be found in nature and several industrial applications. Although turbulence with dispersed spherical particles has been studied extensively, modeling the dynamics of non-spherical particles in a turbulent flow has not been studied extensively. Motion of spherical particles in complex flows is typically captured...
    Resource Type:
    Masters Thesis
    Full Text:
    ) where ρp and ρf are the particle and the fluid density respectively. c = a, which is the semi-minor

  • Development of Two-Color Laser Induced Fluorescence Fluid Temperature Imaging for Free Convection Heat Transfer Applications

    Creator:
    McAfee, Rachel C.
    Abstract:
    The development of a continuous and reliable cooling method for computer chips is an evolving subject requiring continuous research in both computer science and thermal management. Two-dye laser induced fluorescence (LIF) provides a minimally invasive way to investigate electronics cooling fluid behavior. Dielectric fluids are of particular interest as they...
    Resource Type:
    Honors College Thesis
    Full Text:
    35 40 45 50 I r /I s Temperature (°C) 14 removes this obstacle, but still has the

  • Evaluation of the predictive capability of two-phase flow maps for microchannel condensation of R-134a at low mass flux conditions

    Creator:
    VanderPutten, Michael A.
    Abstract:
    Predicting condensation flow regimes and the associated heat transfer and pressure drop in microchannels is critical for designing terrestrial and space systems for heating, cooling, power generation, and advanced manufacturing. It is well established that in flows approaching the microscale (Dh < 1 mm) gravity-dominated flow regimes become less relevant,...
    Resource Type:
    Masters Thesis
    Full Text:
    refrigerants at large mass fluxes (G > 100 kg-m-2-s-1). Fluid visualization results from these studies have

  • Numerical simulation of cavitating bubble-laden turbulent flows

    Creator:
    Shams Sobhani, Ehsan
    Abstract:
    Many engineering devices and propulsion systems suffer from undesirable effects of cavitation; such as degradation in the efficiency of pumps and turbines, generation of noise and vibration on ship propeller, increased drag and erosion of propeller blade, etc. In spite of decades of research on this problem, detailed study of...
    Resource Type:
    Dissertation
    Full Text:
    more susceptible to cavitation. Most of the cavitating bubbles are in the regions of negative Cp. c

  • Two-Color Laser Induced Fluorescence Imaging of Fluid Temperature for Free Convection and Vapor Condensation

    Creator:
    McAfee, Rachel
    Abstract:
    The development of a continuous and reliable cooling method for computer chips is an evolving subject requiring continuous research in both computer science and thermal management. Two-color laser induced fluorescence (LIF) provides a non-invasive way to investigate electronics cooling fluid behavior. Dielectric fluids are of particular interest as they allow...
    Resource Type:
    Masters Thesis
    Full Text:
    commercial pressure chamber and injected at 58 °C via a vertically oriented inlet valve at the base of a

  • Compact integrated microchannel combustor, recuperator and heat exchanger For hydrogen storage applications

    Creator:
    Ghazvini, Mohammad
    Abstract:
    A novel microscale combustor-heat exchanger (μCHX) for hydrogen storage applications is presented in this dissertation. The design of the μCHX is motivated by its application to two particular systems for automotive use- those that utilize metal hydrides (MH) and cryo-adsorbents (CA) to store hydrogen. Thermal energy needs to be supplied...
    Resource Type:
    Dissertation
    Full Text:
    thermal energy rate to a heat transfer fluid, and (c) recuperation between the exhaust gas stream and

  • 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:
    fraction for mass flow rates ranging from 100 to 225 g/min and inlet subcooling levels of 0 to 5 °C. The

  • Single Phase and Flow Boiling Heat Transfer and Flow Characterization in Microscale Pin Fin Heat Sinks

    Creator:
    Rasouli, Erfan
    Abstract:
    The ever increasing requirements for heat dissipation in various thermal management applications such as computer chip cooling and high power electronics have necessitated the need for novel thermal management techniques. Thermal management using heat sinks with microscale features is amongst the prominent techniques developed over the past two decades. In...
    Resource Type:
    Dissertation
    Full Text:
    sinks are tested at three constant mass fluxes of 30, 60, and 100 𝑘𝑔/𝑚2. 𝑠 with heat fluxes

  • Reducing Biogeochemical Models with an Automated Reduction Method

    Creator:
    Klee, Emily
    Abstract:
    Modeling elementary chemical reactions in ocean fluid dynamics simulations requires significant computing resources, which can be diminished with model reduction techniques. Submesoscale ocean turbulence and biogeochemical reactions in the ocean occur on approximately the same time scale, 105 seconds. This similarity in time scales indicates a strong coupling between these...
    Resource Type:
    Masters Thesis
    Full Text:
    ∣∣∣∣∣ upt N(5) − ∂P (i) S ∂t ∣∣∣∣∣ lys R (6) S − P (i) S P (i) C 6∑ j=3 ∂Z (j) C ∂t ∣∣∣∣∣∣ prd P

  • DNS study of Particle-bed-Turbulence Interactions in Oscillatory Flows

    Creator:
    Ghodke, Chaitanya Deepak
    Abstract:
    Turbulent flows over rough surfaces are encountered in many engineering and geophysical applications. Flows of this nature, due to their increasing technological interests, have been a subject of rigorous investigation in recent years. Of the particular interest to the oceanographic community is the study of turbulent oscillatory flow over rough...
    Resource Type:
    Dissertation
    Full Text:
    study. The contributions of the co-authors is highly acknowl- edged. • Ghodke, C. D., and Apte, S. V