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  • 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:
    unstructured grid finite volume solver. Large Eddy Simulation technique with dynamic Smagorinsky subgrid model

  • Advanced numerical modeling of the Lorentz mixing process

    Creator:
    Hager, Michael B.
    Abstract:
    There are numerous techniques for improving the mixing of fuel and oxidant species. However, many of these methods cannot be applied to combustion systems due to material limitations. A means of mixing the reacting species without physically invading the flow stream is therefore desired. In this work, induced electromagnetic forces...
    Resource Type:
    Masters Thesis
    Full Text:
    model. Numerical experiments are performed based on a three level Box-Behnken design in which the

  • Exact frequencies and mode shapes of a rotating beam

    Creator:
    Wright, A. D. (Alan Duane), 1954-
    Abstract:
    The exact frequencies and mode shapes of flexural vibration of a rotating beam are found. The beam has a linear mass and stiffness distribution. With certain simplifying assumptions, the kinetic and potential energies of the rotating beam are found. Hamilton's principle is then used to determine the equation governing the...
    Resource Type:
    Masters Thesis
    Full Text:
    deflection. The mathematical model for a rotating beam produces a fourth order linear differential equation

  • Volumetric receiver development : a heat transfer and design evaluation of an advanced air heating solar thermal central receiver concept

    Creator:
    Drost, M. K.
    Abstract:
    The volumetric receiver is an advanced solar central receiver concept designed to produce high temperature air. This document presents the results of a heat transfer and performance evaluation of the volumetric receiver concept. The volumetric receiver consists of an array of ceramic fins or fibers arranged in concentric rows around...
    Resource Type:
    Dissertation
    Full Text:
    calculated using a Monte Carlo model where an innovative numerical scheme was used to improve computation

  • Dynamic modeling of a refrigerant boiler for power applications

    Creator:
    Curry, Thomas Haitsch
    Abstract:
    A dynamic model of a refrigerant boiler has been produced by the use of distributed parameter modeling techniques. A number of elementary cases were studied and were used as an aid in the final model formulation. Modeling using distributed parameters employed the use of mesh equations which were then reorganized...
    Resource Type:
    Masters Thesis
    Full Text:
    . Holley A dynamic model of a refrigerant boiler has been produced by the use of distributed parameter

  • Performance of rotary regenerative heat exchanger--a numerical simulation

    Creator:
    Bae, Young Lib
    Abstract:
    This thesis examines the transient and steady-state temperature performance of a rotary regenerative heat exchanger. In contrast to previous studies on this problem, fluid flow in the circumferential direction was considered. Appropriate modeling was included to measure the effect of carry-over on the differential equations describing mass and energy conservation....
    Resource Type:
    Dissertation
    Full Text:
    express particular appreciation to Dr. Lindstrom for his advice on the mathematical development of this

  • Numerical modeling of the hydrodynamics of gas fluidized beds

    Creator:
    Wang, Yusan
    Abstract:
    This research involves a numerical study of the hydrodynamics of gas fluidized beds. We use the continuum model, treating both gas and particles as interpenetrating continua. The motion of gas and particles is strongly coupled by the interactions between them. For simplicity, we only consider drag forces. We use MacCormack's...
    Resource Type:
    Dissertation

  • Monte Carlo simulation of radiation heat transfer in a three-dimensional enclosure containing a circular cylinder

    Creator:
    Hong, Seung-Ho
    Resource Type:
    Masters Thesis
    Full Text:
    the method is a repetitive experiment using a mathematical model in place of the actual physical

  • Predicting rebound of planar elastic collisions

    Creator:
    Cruz-Conde Gret, Raphaël
    Abstract:
    Impact is a large and complex field. It embraces both structures as simple as a nail, and more complex systems, such as a car collision. A central feature of impact theory is finding the dependence between the velocities before and after impact. The transformation law of the velocities in an...
    Resource Type:
    Masters Thesis
    Full Text:
    , the theoretical development of the subject usually leads to a severely complex mathematical model

  • Reliability centered prediction technique for diagnostic modeling and improvement

    Creator:
    Murphy, Michael D., 1965-
    Abstract:
    Design phase decisions based on diagnosability lead to lower system costs and, in turn, higher quality products by means of reducing maintenance time and increasing system reliability. A case for diagnosability is presented. Functions of diagnosability are expounded upon including life cycle costs, statistical analysis, and design criterion to emphasize...
    Resource Type:
    Masters Thesis
    Full Text:
    knowledge and experience. Regardless of the specific parameter, if the mathematical model of a statistical