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Flat-plate oscillating heat pipes and thermal spreading analysis of heat spreaders
(University of Missouri--Columbia, 2012)
components and provides for higher Shannon entropy. Because the effective thermal conductivity of a FP-OHP largely depends on its form factor and heating/cooling configuration, a mathematical model predicting the thermal spreading performance of a heat...
Effects of machining system parameters and dynamics on quality of high-speed milling
(University of Missouri--Columbia, 2013)
mathematical force models including the effect of the helix angle are presented for an end-milling process. The linear force model includes cutting-edge coefficients. The cutting force coefficients are determined for an end-milling process using two methods...
Robust control design for a proportional valve with backlash compensation
(University of Missouri--Columbia, 2013)
uncertainties. Thus, unexpected changes in the stability can be exhibited and can lead these systems to become unstable exhibit oscillatory behavior. Engineers have been trying to develop nonlinear mathematical models to be able to predict whether or not a...
Chatter detection and prevention in high-speed milling
(University of Missouri--Columbia, 2011)
In this work, two separate mathematical models, a traditional and new model, are presented for an end-milling process. The traditional model assumes circular tool motion, while the new model accounts for trochoidal tool motion resulting from...
Rapid industrial furnace thermal modeling for improved fuel efficiency
(University of Missouri--Columbia, 2007)
The development and verification of an innovative modeling technique for industrial gas fired glass melting furnaces will be discussed. Rapid and accurate modeling of industrial furnaces is needed for the development of ...
Theoretial [sic] analysis of oscillating motion, heat transfer, minimum meniscus radius and charging procedure in an oscillating heat pipe
(University of Missouri--Columbia, 2008)
flow rate in the evaporating thin film region. Furthermore, in the current investigation, a mathematical model predicting the minimum meniscus radius occurring in the sintered particles is developed. Moreover, a theoretical analysis predicting...
A development of the motile sperm sorting microfluidic devices
(University of Missouri--Columbia, 2007)
-etching, the polymeric microfluidic devices, mainly microchannels, are fabricated. The fabrication processes of microfluidic devices are completed without an expensive cleanroom facility. To successfully design the microfluidic devices, we built mathematical flow models...
Modeling, design and control of forced-feedback metering poppet valve system
(University of Missouri--Columbia, 2006)
This research explores valve design, dynamic modeling, and techniques to achieve flow control for a forced-feedback metering poppet valve system. In particular, nonlinear and linear models of a forced feedback configuration ...
Characterization of mechanical properties of fused deposition modeling manufactured polycarbonate composites
(University of Missouri--Columbia, 2007)
samples following the ASTM D 638-03 and ASTM D 3039-00 standards. This gives the mechanical properties of either individual polycarbonate fibers or the lamina, which serves as input to a mathematical formulation developed in Matlab. Image mesostructure...
Design optimization and efficiency modeling of a hot gas vane motor
(University of Missouri--Columbia, 2007)
The purpose of this research is to model and analyze the dynamics of a hot gas vane motor for design optimization work. The pneumatic motor is a portable direct drive actuator that is intended as an alternative to ...
Analysis of lubrication groove geometry
(University of Missouri--Columbia, 2006)
Lubrication is process of using lubricants in moving machine components to reduce friction and wear between them and consequently to improve their running life. In this thesis, a groove is introduced in these components ...
Modeling and analysis of nonlinear biological systems
(University of Missouri--Columbia, 2007)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] This dissertation focuses on the modeling and analysis of a set of biological phenomenon at a cellular (Part I) and systems (Part II) level. In Part ...
Investigation of static interfacial fracture in orthotropic-orthotropic composite bimaterials using photoelasticity
(University of Missouri--Columbia, 2009)
halves, interface properties, and interface orientations. The experimentally obtained fringe patterns were mathematically regenerated for validating the fracture model....
Modeling tools and prototype design of loop heat pipe for electronics cooling
(University of Missouri--Columbia, 2009)
In this dissertation, a set of modeling tools for loop heat pipe (LHP) design is developed, and original analytical models for annular two-phase flow are proposed. LHPs are promising two-phase thermal transport devices for ...
A high efficiency ejector refrigeration system
(University of Missouri--Columbia, 2010)
electricity supply is limited or non-existent. A mathematical model has been developed, which considers both the isentropic efficiencies to account for viscous effects, and the potential for a multi-fluid system. At the same time, an experimental investigation...
System modeling and control design of a two-stage metering poppet-valve system
(University of Missouri--Columbia, 2006)
The goal of this work is to develop mathematical models, stability criteria, and control designs for a two-stage poppet valve system with a simple back-side pipeline condition that may be used in a valve stack to create an independent metering...
Theoretical and experimental investigation of oscillating heat pipes
(University of Missouri--Columbia, 2006)
A mathematical model describing the oscillation characteristics of slug flow in a capillary tube is presented. The model considers the vapor bubble as the gas spring for the oscillating motions in a capillary tube including effects of capillary...
Specific bio-modeling and analysis techniques at cellular and systems level
(University of Missouri--Columbia, 2006)
focuses on mathematical models at the systems level. Specifically, thermal physiology models of the entire human body are developed using statistical and black box (artificial neural network, ANN) techniques.The MU 2-D Man, a human thermal model has been...
Modern control design for a variable displacement hydraulic pump
(University of Missouri--Columbia, 2006)
In this work modern control methods are used to design and analyze control methods for a variable-displacement hydraulic pump. More accurate uncertainty descriptions are derived by using a structured uncertainty model as ...
Nonlinear control and active damping of a forced-feedback metering poppet valve
(University of Missouri--Columbia, 2007)
For a metering poppet valve which was developed at the University of Missouri (MU valve), the valve can be configured for performance at the cost of stability. It is desirable to achieve both performance and stability using electronic control...