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Articles 1 - 9 of 9

Full-Text Articles in Engineering

Design And Construction Of A Chemical Engineering (Cheme) Car Using Thermoelectrics, Timothy Barnhill, Sara Davino, Spencer Faltin, Lauryn Jamison, Christina Papadimitrio, Mccall Rogers May 2014

Design And Construction Of A Chemical Engineering (Cheme) Car Using Thermoelectrics, Timothy Barnhill, Sara Davino, Spencer Faltin, Lauryn Jamison, Christina Papadimitrio, Mccall Rogers

Senior Theses

Six chemical engineering undergraduates at the University of South Carolina formed a team to compete in the 2014 AIChE Chem-E-Car competition at the Southern Regional Student Conference in San Juan, Puerto Rico, in March. In the Chem-E-Car competition, students must design and build a vehicle powered by an unconventional form of chemical energy to carry a specified weight over a given distance (1). The group used knowledge gained through undergraduate study to construct a small-scale vehicle that is powered by a set of thermoelectric generators utilizing a heat gradient between boiling water and an ethanol-dry ice mixture (2). An iodine ...


Development Of A Novel Microreactor For Improved Chemical Reaction Conversion, Yu Liang Apr 2005

Development Of A Novel Microreactor For Improved Chemical Reaction Conversion, Yu Liang

Doctoral Dissertations

Microreactors have been widely studied over the past two decades for different chemical reactions, to develop new analytical capabilities, and to obtain high mixing performance in the reactors. The main objectives of this work are to investigate the effect of different microchannel structures on the fluid properties and mixing behavior in microreactors, and to design, fabricate, and test a novel microreactor for higher conversion in a chemical reaction. The development of this novel microreactor is intended to provide a valuable guideline in achieving enhanced chemical mixing and to make available a solid research base for optimization of the yield of ...


Hybrid Finite-Volume/Transported Pdf Method For The Simulation Of Turbulent Reactive Flows , Venkatramanan Raman Jan 2003

Hybrid Finite-Volume/Transported Pdf Method For The Simulation Of Turbulent Reactive Flows , Venkatramanan Raman

Retrospective Theses and Dissertations

A novel computational scheme is formulated for simulating turbulent reactive flows in complex geometries with detailed chemical kinetics. A Probability Density Function (PDF) based method that handles the scalar transport equation is coupled with an existing Finite Volume (FV) Reynolds-Averaged Navier-Stokes (RANS) flow solver. The PDF formulation leads to closed chemical source terms and facilitates the use of detailed chemical mechanisms without approximations. The particle-based PDF scheme is modified to handle complex geometries and grid structures. Grid-independent particle evolution schemes that scale linearly with the problem size are implemented in the Monte-Carlo PDF solver. A novel algorithm, in situ adaptive ...


Computational Fluid Dynamics For Design And Optimization Of Tubular Low-Density Polyethylene Reactors , Nitin Hiralalsa Kolhapure Jan 2001

Computational Fluid Dynamics For Design And Optimization Of Tubular Low-Density Polyethylene Reactors , Nitin Hiralalsa Kolhapure

Retrospective Theses and Dissertations

Polymer reactor models often assume that the reactants are mixed rapidly and thus the concentrations can be considered to be uniform at small scales. However, for fast reactions or for viscous systems, poor mixing of chemical species significantly affects the reactor performance while adversely affecting product quality. The purpose of this research is to formulate a generalized algorithm based on state-of-the-art computational fluid dynamics (CFD) techniques such as full or presumed probability density function (PDF) methods to better understand the role of micromixing in mixing-sensitive chemical processes. The impressive capabilities of the algorithm are investigated using an industrial test-case of ...


Development Of An Empirical Model Of Human Sweating And A Semi-Empirical Model Of Human Thermoregulation , Jennifer Jane Walker Jan 1999

Development Of An Empirical Model Of Human Sweating And A Semi-Empirical Model Of Human Thermoregulation , Jennifer Jane Walker

Retrospective Theses and Dissertations

The physiology of the human thermoregulatory response to changes in environment and work load has been studied from the perspective of both the physiologist and the engineer. Both fields have brought certain skills and tools to the effort. An effort to bring together the understanding gained from these two perspectives has been lacking. In this work a model for the sweat response and a model for the thermoregulatory response to changes in room temperature were developed. These models were developed using the modeling tools of engineering and the knowledge contained in past experimental data;An empirical model of the sweat ...


Simulation Of Magnetic Refrigeration Systems, Nupur Agrawal Jan 1997

Simulation Of Magnetic Refrigeration Systems, Nupur Agrawal

Retrospective Theses and Dissertations

No abstract provided.


Sonochemical Reactions: Mass Transfer And Kinetic Studies Of A Solid-Liquid System , Leigh Christine Hagenson Jan 1997

Sonochemical Reactions: Mass Transfer And Kinetic Studies Of A Solid-Liquid System , Leigh Christine Hagenson

Retrospective Theses and Dissertations

Ultrasound has been shown to have desirable effects on both homogeneous and heterogeneous reactions, such as increasing the conversion, enhancing the selectivity, and improving the yield. Enhancements due to ultrasound may be attributed to chemical effects or mechanical effects, or to both simultaneously. The chemical effects of ultrasound are attributed to the implosion of microbubbles, generating free-radicals with a great propensity for reaction. Mechanical effects are caused by shock waves formed during symmetric cavitation, or by microjets formed when the bubble implodes asymmetrically. Research emphasis in this area attempts to discern the mechanisms behind ultrasound's mechanical effects by selecting ...


Visualizing Thermodynamic Stability And Phase Equilibrium Through Computer Graphics , Daniel Charles Coy Jan 1993

Visualizing Thermodynamic Stability And Phase Equilibrium Through Computer Graphics , Daniel Charles Coy

Retrospective Theses and Dissertations

In a landmark paper, J. W. Gibbs introduced a fundamental thermodynamic surface for pure materials and, later, expanded that analysis to mixtures. While Gibbs certainly had images of these surfaces in his mind, he described them in words rather than drawings. Since Gibbs time, a number of researchers have produced representations of these surfaces, but their studies have been limited because of the difficulty of creating and visualizing the data sets required. In this work, computer graphics has been used to visualize a variety of these models for pure, binary, and ternary systems;Fundamental-equation surfaces produced from Legendre transforms of ...


Prediction Of Ionic Structure In Hydrocarbon Flames , Ahmet Nedim Eraslan Jan 1987

Prediction Of Ionic Structure In Hydrocarbon Flames , Ahmet Nedim Eraslan

Retrospective Theses and Dissertations

The objective of this research is to model the appearance and behavior of combustion-generated ions in hydrocarbon flames. An understanding of ionic phenomena is important to the development of advanced combustion technology including electrical control of flame structure and suppression of soot formation. Computer models have been developed to evaluate the formation and behavior of ions in acetylene flames;The results of computations are compared to experimental data of other researchers. Several important qualitative features have been successfully modeled. Peak ion concentrations of 10('9) to 10('11) cm('-3) are consistent with experimental measurements. The ratio of large ions ...