Engineering Commons^™

College Of Engineering Graduate Celebration 2012 Announcement, University Of Nevada, Las Vegas

College of Engineering: Graduate Celebration Programs

The Howard R. Hughes College of Engineering Graduate Celebration is an event that recognizes the scholarly work of our engineering and computer science graduate students within the college. The target audience includes undergraduate students, graduate students, college faculty and staff, and the campus community as well as local and regional stakeholders. The objective of the event is to promote and publicize the research activities of the College of Engineering and to inform our stakeholders of our students’ achievements.

New Approaches In Automation, Allen Lam

Hong Kong Innovative Users Group Meetings

No abstract provided.

Millennium Systems On The Cloud: Experience On System Migration From Sun V490 To Vmware Platform, Yiu On Li, Jimmy Tsang

Hong Kong Innovative Users Group Meetings

No abstract provided.

Rfid And The Millennium: Item Status Api, Wilson Chu

Hong Kong Innovative Users Group Meetings

No abstract provided.

Proceedings, Msvscc 2012, Old Dominion University, Department Of Modeling, Simulation & Visualization Engineering, Old Dominion University, Virginia Modeling, Analysis & Simulation Center

Modeling, Simulation and Visualization Student Capstone Conference

Proceedings of the 6th Annual Modeling, Simulation & Visualization Student Capstone Conference held on April 19, 2012 at VMASC in Suffolk, Virginia.

Network Resilience In Disasters: An Interdisciplinary, International Perspective, Satish Ukkusuri

Changing World Conference

No abstract provided.

11th Annual Undergraduate Student Symposium, Farquhar Honors College

Undergraduate Student Symposium

The Undergraduate Student Symposium, sponsored by the Farquhar College of Arts and Sciences, presents student projects through presentations, papers, and poster displays. The event serves as a “showcase” demonstrating the outstanding scholarship of undergraduate students at NSU. The Symposium is open to undergraduate students from all disciplines. Projects cover areas of student scholarship ranging from the experimental and the applied to the computational, theoretical, artistic, and literary. They are taken from class assignments as well as from independent projects. The projects do not have to be complete; presentations can represent any stage in the concept’s evolution, from proposal and literature …

Poster Session, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Western Kentucky Deep Saline Reservoir CO₂ Storage Test: Shallow Groundwater Monitoring Results, E. Glynn Beck and others, Kentucky Geological Survey
• Baseline Soil Properties of a Central Kentucky Riparian Buffer, Amanda Gumbert and others, Dept of Plant and Soil Science, UK
• The Kentucky Water Well Driller’s Certification Program, Scotty E. Robertson and David A. Jackson, Kentucky Division of Water, Frankfort, KY
• Influences of Cladophora Bloom on the Diets of Amblema plicata and Elliptio dilatata in the Upper Green River, Kentucky, Jennifer M. Yates and others, Dept of Biology, Western Kentucky University
• Using Electrical Resistivity to Locate …

Session 2c, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• The Developing Need for the Regulation of Geothermal Closed Loop Borehole Installations, David A. Jackson, Kentucky Division of Water, Frankfort, KY
• Strategies for Effective Management and Mitigation of Nonpoint Source Pollution within Wellhead Protection Areas, Jessica Moore and others, Kentucky Division of Water, Frankfort, KY
• Status and Early Findings at the Kentucky Horse Park Monitoring Station, James C. Currens and others, Kentucky Geological Survey
• Fluid Evolution in Cambrian-Ordovician Knox Group Reservoirs, Marty Parris and M.W. Bradley, Kentucky Geological Survey and USGS, Tennessee Water Science Center, Nashville, TN
• Simulating Long-Term Fate of CO₂ for a Western …

Technology Trends And Predictions: Is A Flying Car In Our Future?, Carol A. Watson

Continuing Legal Education Presentations

Discusses the future of legal research and technologies that are currently available for law offices. Highlights current technology trends and predictions and the latest innovations in courtroom technology. Concludes with a list of general technology predictions that will hopefully provide food for thought and generate excitement about the coming prospects of technology.

Session 2b, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Agriculture Producer Responses to Government-Funded Conservation Programs to Address Water Quality, Wuyang Hu and others, Dept of Agricultural Economics, UK
• Abatement Costs for Agricultural Non-Point Source Polluters, Jack Schieffer and others, Dept of Agricultural Economics, UK
• Point Source Polluters in the Kentucky River Watershed and the Potential for Water Quality Trading, Ron Childress and others, Dept of Agricultural Economics, UK
• Point Source Abatement Costs and Preferences for Trading Market Mechanisms in the Kentucky River Watershed, Andrew McLaughlin and others, Dept of Agricultural Economics, UK

Session 2a, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• The Potential for Using a P Loss Model to Improve the Accuracy of the Kentucky Phosphorus Index, Carl H. Bolster, USDA-ARS, Bowling Green, KY
• Additive State Space Model – A Promising Approach to Water- Quality-Related Treatment Experiments in Heterogeneous Landscapes, Ole Wendroth, Dept of Plant and Soil Sciences, UK
• Development and Application of Numeric Interpretations of Kentucky’s Narrative Water Quality Standards for Nutrients, Lara Panayotoff, Kentucky Division of Water, Frankfort, KY
• Arsenic Removal in Reactor Systems, Aniruddha Dastidar and Y.T. Wang, Watershed Management Branch and Dept of Civil Engineering, UK
• Trends in Water Quality Issues for …

Session 1c, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• The Effects of Prescribed Fire on Amphibian and Reptile Diversity in an Oak-Grassland Restoration Area, Robert Knopp and Howard Whiteman, Dept Biological Sciences and Watershed Studies, Murray State University
• Results of a Data Evaluation to Establish Priority Remediation Areas for Dry Weather Fecal Contamination in a Karst Influenced Watershed, Steve Evans and others, Third Rock Consultants, Lexington, KY
• Development of In-House Methods for High-Throughput DNA Extraction, Kimberly L. Cook and LorraBelle Hill, USDA-ARS, Bowling Green, KY
• Validation of the Sanitary Category Value Model (SCV) for the Identification of Leaking Sewer Lines: A Study of the West Hickman …

Session 1b, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• University – Habitat for Humanity Green Infrastructure Demonstration Project, Nancy Givens and Terry Wilson, WKU Center for Environmental Education and Sustainability, Bowling Green, KY
• Effectiveness of Pollutant Removal in the McConnell Springs Stormwater Quality Wetland Pond and the Gainesway Pond Retrofit Project, Year Two, David J. Price and Susan L. Plueger, Lexington-Fayette Urban County Government
• Coca-Cola Stormwater Replenish Project, Eric Dawalt and Russ Turpin, Ridegewater, LLC and EcoGro, Lexington, KY
• ITEST and LFUCG Stormwater Professional Development, Brian Radcliffe and Carol D. Hanley, Tracy Farmer Institute for Sustainability and the Environment, UK

Session 1a, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• A Regionally-Calibrated Critical Flow for Stream Channel Protection, Bob Hawley and others, Sustainable Streams LLC, Louisville, KY
• Monitoring Wetland Restoration Success at North Fork of Irish Creek, Brian C. Reeder, Center for Environmental Education and Institute for Regional Analysis and Public Policy, Morehead State University
• NC2D Open Channel Flow Model: Development and Applications for Stream Restoration Design in Kentucky, Brian J. Belcher, Beaver Creek Hydrology LLC, Lexington, KY
• Using Remote Sensing Tools to Target Stream Protection and Wastewater Treatment BMPs in Rural Kentucky, Catherine Carter and others, Tetra Tech, Research Triangle Park, NC
• Improving Water Quality …

Plenary Session: Water Research Needs In Kentucky, Alan E. Fryar, Peter T. Goodmann, Michael S. Griffin, James A. Kipp

Kentucky Water Resources Annual Symposium

Four panelists were invited to present their visions/predictions of current and future water research needs in Kentucky in an opening plenary session at the 2012 Kentucky Water Resources Annual Symposium. The requested overall general focus was ground water research needs.

Proceedings Of 2012 Kentucky Water Resources Annual Symposium, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

This symposium was planned and conducted as a part of the state water resources research institute annual program that is supported by Grant/Cooperative Agreement Number G11AP20081 from the United States Geological Survey. The contents of this proceedings document and the views and conclusions presented at the symposium are solely the responsibility of the individual authors and presenters and do not necessarily represent the official views of the USGS or of the symposium organizers and sponsors. This publication is produced with the understanding that the United States Government is authorized to reproduce and distribute reprints for government purposes.

An Adjoint Method To Determine The Effective Material Properties Of An Ablator, Emma Johnstone

Ablation Workshop

The determination of the effective thermal properties of a material from thermocouple data has always been very labour intensive. Similarly determining the Arrhenius parameters for a decomposition model from thermo-gravimetric analysis is also very time-consuming. There is little formalisation of the procedures used to determine the material properties. Despite the fact that some effort has been devoted to this topic in the literature, it is not clear whether comparable effective material properties data would result if several groups used the same experimental data. The FGE Ablation code FABL has been written in an adjoint form and has successfully been used …

Ultrasonic Thermometry For Recession Measurements In Ablative Materials, Joseph A. Lloyd, Donald E. Yuhas

Ablation Workshop

Recent developments in ultrasonic instrumentation & sensors, improved signal processing, and high speed data acquisition have rekindled interest in ultrasonic thermometry and made temperature localization feasible and economically attractive to a wider range of applications. Ultrasound-based temperature measurements offer several advantages: they are non-intrusive, have high temporal response, isolate the sensor from explosive or chemically harsh environments and do not adversely influence thermal transport. Ultrasonic thermometry techniques rely on precise measurements of ultrasonic time-of-flight (ToF) which forms the basis for many applications including measurements of flow, heat flux, temperature, ablation and strain. In this report, we characterize the ultrasonic propagation …

A Statistics-Based Material Property Analysis To Support Ablation Simulation Uq Efforts, Sean R. Copeland, Juan Alonso, Milad Mahzari, Ioana Cozmuta

Ablation Workshop

Accurate characterization of entry capsule heat shield material properties is a critical component in modeling and simulating Thermal Protection System (TPS) response in a prescribed aerothermal environment. The thermal decomposition of the TPS material during the pyrolysis and charring processes is typically poorly characterized and results in large uncertainties in material properties as inputs for ablation models. These material property uncertainties contribute to large design margins on flight systems and cloud re-construction efforts for data collected during flight and ground testing, making revision to existing models for entry systems more challenging. This work focuses on the following areas of interest …

Efficient Uncertainty Quantification & Sensitivity Analysis For Hypersonic Flow And Material Response Simulations Under Inherent And Model-Form Uncertainties, Serhat Hosder

Ablation Workshop

Accurate numerical prediction of coupled hypersonic flow fields and ablative TPS material response is challenging due to the complex nature of the physics. The uncertainties associated with various physical models used in high-enthalpy hypersonic flow and material response simulations can have significant effects on the accuracy of the results including the heat-flux and temperature distributions in various layers of ablating TPS material. These uncertainties can arise from the lack of knowledge in physical modeling (model-form or epistemic uncertainty) or inherent variations in the model inputs (aleatory or probabilistic uncertainty). It is important to include both types of uncertainty in the …

Ablative Thermal Protection System (Tps) Margin Study, Steven Rickman, Lawrence Green, Brian Remark, Stan Bouslog, Jeremy Vander Kam, Mohammad Khalessi

Ablation Workshop

Predicting the reliability of the heat shield for crewed space vehicles has been a topic of continuing interest within NASA for many years. The design of a thermal protection system (TPS) is subject to numerous large sources of uncertainty and reliability assessments of such TPS are rare. The proposed talk discusses both the application of Design Of Experiments (DOE) to developing a new arc jet testing campaign for a given TPS and the reliability assessment conducted for the same TPS for a crewed space capsule (similar to Apollo capsules) to withstand re-entry to earth from space.

The objectives of the …

Study Of Mechanical And Thermal Behavior Of Polymeric Ablator Using Md, Abhishek Kumar, Veera Sundararaghavan

Ablation Workshop

The thermal protection materials used for spacecraft heat shields are subjected to various thermal and mechanical loads during an atmospheric entry which can threaten the structural integrity of the system. This paper describes the development of a molecular dynamics approach to understand the mechanical and thermal behavior of high temperature polymers. One such material PICA has successfully flown on the Stardust spacecraft and is the TPS material chosen for the Mars Science Laboratory (MSL) and SpaceX Dragon spacecraft. Although such polymers have good structural properties at moderate temperature,they became structurally weak at extreme region of temperature and loads. In order …

Aerothermal Characterization Of Silicon Carbide-Based Tps In High Enthalpy Airflow, Francesco Panerai, Olivier Chazot

Ablation Workshop

Inductively-coupled plasma generators provide an ideal environment to reproduce the aerothermal heating experienced by a spacecraft re-entering a planetary atmosphere. The flight boundary layer chemistry is duplicated around a TPS model, ensuring a similarity between the flight and ground stagnation-point heat flux.

Experiments conducted in an induction plasmatron on silicon carbide-based thermal protection materials will be described. Several specimens are tested under a wide range of pressure and temperature conditions and investigated by means of infrared radiometry and optical emission spectroscopy. The plasma to which the materials are exposed is characterized in details by calorimetric and Pitot pressure measurements, and …

Methodology For Ablation Investigations In The Vki Plasmatron Facility: Preliminary Results With A Carbon Fiber Preform, Bernd Helber, Olivier Chazot, Annick Hubin, Thierry Magin

Ablation Workshop

Following the current developments of a new class of low-density, carbon/resin composite ablators, new efforts were initiated at the VKI on ablation research to understand the complex material response under reentry conditions and to develop and validate new material response models. Promising experimental results were obtained by testing the low-density monolytic composite ablator (MonA) in the 1.2MW inductively heated VKI Plasmatron facility. The application of a high speed camera with short exposure times (2μs) enabled in-situ analysis of both (3D) surface recession and spallation and further made it possible to demonstrate the outgassing effects of pyrolizing ablators. A change in …

Thermo-Chemical And Mechanical Coupled Analysis Of Swelling, Charring And Ablative Materials For Re-Entry Applications, Gregory Pinaud

Ablation Workshop

One of the major challenges in the design of atmospheric reentry vehicles is the optimization of the thermal protection system (TPS). During a reentry, the vehicle encounter severs heating and mechanical stress. A robust sizing is therefore essential to insure vehicle integrity and the mission success. In order to maximize the payload mass of the vehicle, lightweight charring ablators are commonly chosen as TPS materials for this one shot mission.

To predict the behaviour of the TPS ablative materials under pyrolysis for reentry applications, Astrium ST initiated the development of a specific module of the finite element software SAMCEF: AMARYLLIS. …

Coupled Computation Of Fluid And Material Response For Non-Charring Ablative Materials In Hypersonic Flow, Jonathan E. Wiebenga, Iain D. Boyd

Ablation Workshop

Hypersonic vehicles are subjected to high heat loads throughout their flight trajectories, and as a result, some form of thermal protection system (TPS) is required to ensure the vehicle’s survival. Accurate prediction of the behavior of these materials in a hypersonic environment is crucial to the efficient design of a hypersonic flight vehicle. It can be very costly and difficult, however, to experimentally replicate the flow conditions found in many hypersonic regimes, and for this reason it is desirable to be able to simulate the behavior of TPS materials under these flight conditions. This study aims to improve the modeling …

Uncertainty Analysis Of Reaction Rates In A Finite Rate Gas-Surface Model, Thomas E. Schwartzentruber

Ablation Workshop

A finite–rate–catalytic wall boundary condition incorporated into hypersonic flow simulations is investigated. Benchmark simulations of hypersonic flow over a cylinder are presented using the finite–rate–catalytic model parameterized with a test air–silica chemical model comprising the gas–surface reaction mechanisms and their associated rates. It is demonstrated that backwards recombination rates should not be arbitrarily set but must be consistent with the gas–phase thermodynamics, otherwise a drift from the equilibrium state may occur. The heat flux predicted by the finite rate model lies between non–catalytic and super–catalytic limits depending on the surface temperature. It is found that even for a constant surface …

Cfd Ablation Predictions With Coupled Gsi Modeling For Charring And Non-Charring Materials, Daniele Bianchi, Alessandro Turchi, F. Nasuti, M. Onofri

Ablation Workshop

To this day, a major objective of TPS design is to reduce empiricism, and to increase fundamental modeling capability through increased understanding. One of the most challenging aspect is the proper coupling between the material response and the external flow field. With this regard, the goal of this research activity is the improvement of the numerical modeling capabilities through the development of advanced CFD tools integrated with Gas-Surface Interaction (GSI) modeling.

Numerical prediction of ablation is ambitious and cpu-time demanding due to the complex multiphase physical and chemical processes that occur. With improvements in computational algorithms and advances in computer …

Radiative Transfer Equation Solver Module For Coupled Simulation Of Hypersonic Flows, Ranjan S. Mehta, Paul J. Dionne, Samuel F. Owens

Ablation Workshop

Accurate numerical modeling of the aerothermal environment around an ablation-cooled hypersonic re-entry vehicle requires high-fidelity models for processes such as non-equilibrium surface themochemistry, non-equilibrium pyrolysis chemistry, multi-scale radiation, spallation and charring. It is expected that, these models when utilized in a coupled manner will be able to accurately capture the possible nonlinear interactions between various phenomena in a computationally efficient manner. Development of a coupled radiative solver is currently being carried out as part of a joint effort between CFDRC, University of Michigan and University of Kentucky to develop a fully coupled method of simulating atmospheric entry flows and response …