Search Constraints

Start Over
Filtering by: Creator Sienkiewicz, Joseph M. Remove constraint Creator: Sienkiewicz, Joseph M. Advisor Apte, Sourabh V. Remove constraint Advisor: Apte, Sourabh V. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

Search Results

  • Development of a Cartesian-grid-based solver for an oscillatory boundary layer over a rough wall

    Creator:
    Skitka, Joseph M.
    Abstract:
    Predominant models for predicting rates of sediment transport face acute shortcomings when applied to coastal boundary layers. This is due to a neglect of the web of stochastic variables governing the rate of sediment dislodgement. While stochastic models do exist, the parametric extent of their validity tends to be limited,...
    Resource Type:
    Masters Thesis
    Full Text:
    Oscillatory Boundary Layer over a Rough Wall AN ABSTRACT OF THE THESIS OF Joseph M. Skitka for the

  • Investigation of volumetric coupling effects on particle-laden turbulent flows at dilute to moderate loadings

    Creator:
    Cihonski, Andrew John
    Abstract:
    Particle-laden turbulent flows are of great importance in many industrial applications and are sufficiently complex to require multiple methods of study to provide a better understanding of the dominant physical mechanisms present in these processes. This work on large-eddy simulation of particle-laden flows seeks to help provide the building blocks...
    Resource Type:
    Masters Thesis
    Full Text:
    m = 1 and St = 70. . . . 67 6.10 Normalized Particle Volume Fraction vs Wall Normal Distance

  • 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:
    respected for spherical particles. The model is the same as used by Joseph & Patankar [34], and based on

  • 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:
    discussions and experimental data provided by Prof. Joseph Katz and Dr. Xiafeng Liu from Johns Hopkins

  • Modeling and simulation of volume displacement effects in multiphase flow

    Creator:
    Cihonski, Andrew John
    Abstract:
    There are many options available when selecting a computational model for two-phase flows. It is important to understand all the features of the model selected, including when the model is appropriate and how using it may affect your results. This work examines how volume displacement effects in two-phase Eulerian-Lagrangian models...
    Resource Type:
    Dissertation
    Full Text:
    . . . . . . . . . . 47 4.7 Streamwise mean gas velocity for m = 1, with the coupling and collision method indicated in

  • 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:
    solid particles or va- por/gas bubbles. 3 F ig u re 1. 1: S ch em at ic of p ar al le l m

  • On the Euler-Lagrange Modeling of Particle-laden Turbulent Flows

    Creator:
    Pakseresht, Pedram
    Abstract:
    Particle-laden turbulent flows, wherein a large number of small size particles are dispersed in a fluid, are widely encountered in environmental and industrial applications. Understanding their underlying physics, making predictions without performing expensive experiments, and ultimately optimizing the systems carrying such flows, require accurate and robust modelling tools. The Euler-Lagrange...
    Resource Type:
    Dissertation
    Full Text:
    simulations and modified later by Joseph et al. (1990). In this formulation, the carrier and dis- persed

  • 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:
    of friendship as well as good advice and collaboration. I also thank Joseph Skitka for helping me

  • 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