Search Constraints

Start Over
Filtering by: Creator Semba, R. D. Remove constraint Creator: Semba, R. D. Committee Member Liburdy, James Remove constraint Committee Member: Liburdy, James Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

Search Results

  • Radiation Emissions from Turbulent Diffusion Flames Burning Large Hydrocarbon Fuels

    Creator:
    Zeuthen, Eric D.
    Abstract:
    The purpose of this study is to measure and compare radiation emissions from flames burning large hydrocarbon fuels to assist in understanding how the molecular composition changes radiation emissions. Radiative heat transfer is significant because it is a primary mode of heat transfer for many combustion devices. This study also...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Eric D. Zeuthen for the

  • Performance and flow stability characteristics in two-phase confined impinging jets

    Creator:
    Sabo, Michael D.
    Abstract:
    Advances in electronics fabrication, coupled with the demand for increased computing power, have driven the demand for innovative cooling solutions to dissipate waste heat generated by these devices. To meet future demands, research and development has focused on robust and stable two-phase heat transfer devices. A confined impinging jet is...
    Resource Type:
    Masters Thesis
    Full Text:
    D ia m et er (d j ) R e D z/ D j C on fi gu ra ti on B es se rm an et al . [8 ] F C

  • Investigation of Destratification in Warehouses

    Creator:
    Polander, Michael D.
    Abstract:
    A significant source of energy consumption comes from maintaining desired indoor environment conditions in warehouses and other industrial facilities. In efforts to combat the raising energy costs, studies into more efficient heating and cooling strategies has been a topic of consideration for a number of years. One of the areas...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Michael D. Polander for the

  • Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

    Creator:
    Davis, Keith R.
    Abstract:
    A PID controller was designed to control the performance of an oil-heated fractal-like branching microchannel desorber for use in an ammonia-absorption refrigeration system. Both the amount and concentration of ammonia refrigerant generated at the desorber can be controlled by choosing the rectified circulation ratio as the controlled variable in a...
    Resource Type:
    Masters Thesis
    Full Text:
    1 AN ABSTRACT OF THE THESIS OF Keith R. Davis for

  • 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:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 3.11 Close-up view of iso-contours of correlation function Rφ′ψ′ of drag (F ′D) and streamwise

  • On the optimization of performance in fractal-like branching microchannel heat transfer devices

    Creator:
    Heymann, Douglas Benjamin
    Abstract:
    Fractal-like branching microchannel flow networks have been found to improve wall temperature uniformity and decrease both pressure drop and flow power compared to arrays of straight microchannels. The present study seeks to maximize the benefits of fractal-like branching channels by means of a gradient-based optimization algorithm. The algorithm identifies the...
    Resource Type:
    Dissertation
    Full Text:
    channels of width wk, if the following inequality ( 2πRβm n0wm − 1 )∑k i=0 γ i∑m i=0 γ i > d (2β)k+1

  • A multiscale modeling approach for bubble-vortex interactions in hydro-propulsion systems

    Creator:
    Finn, Justin Richard
    Abstract:
    Multiphase flow dynamics are important in many naval and turbomachinery applications, where bubble interaction with low pressure, vortical structures can lead to undesirable cavitation effects. To better understand the underlying phenomena, a multiscale numerical framework is developed to simulate bubble laden flow in dynamic hydro propulsion systems. Several subproblems in...
    Resource Type:
    Masters Thesis
    Full Text:
    ) = D[u] = 0, ⇒ u = uRBM = U + Ω× r  in ΓP , (3.26) where U and Ω are the translation and angular

  • CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models

    Creator:
    He, Xiaoliang
    Abstract:
    With continued development of the electronic industry, the demand for highly efficient heat removal solutions requires innovative cooling technologies. A computational fluid dynamic (CFD) study, including heat transfer, is performed for an axisymmetric, confined jet impingement experiencing boiling and coupled with vapor extraction. Boiling occurs at the target surface while...
    Resource Type:
    Masters Thesis
    Full Text:
    , (b) r* = 1, (c) r* = 2, (d) r* = 4, and (e) r* = 8 ................................63 6.6

  • A numerical study of inertial flow features in moderate Reynolds number flow through packed beds of spheres

    Creator:
    Finn, Justin Richard
    Abstract:
    In this work, flow through synthetic arrangements of contacting spheres is studied as a model problem for porous media and packed bed type flows. Direct numerical simulations are performed for moderate pore Reynolds numbers in the range, 10 ≤ Re ≤ 600, where non-linear porescale flow features are known to...
    Resource Type:
    Dissertation
    Full Text:
    rate tensor: 1 2 ( ∇u+ (∇u)T ) = D[u] = 0, ⇒ u = uRBM = U+ Ω× r } in ΓP , (2.4) where U and Ω

  • 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:
    rotation. see equation (2.2): dr dt = dR dt + dϕ dt × ˆ̂r (2.2) 19 Figure 2.3: Moving particle