Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (5925)
- Energy Systems (5619)
- Other Mechanical Engineering (5086)
- Education (3624)
- Arts and Humanities (3526)
-
- Science and Mathematics Education (3476)
- History (3407)
- History of Science, Technology, and Medicine (3399)
- United States History (3399)
- Aerospace Engineering (3233)
- Materials Science and Engineering (3172)
- Manufacturing (2381)
- Electrical and Computer Engineering (1761)
- Engineering Science and Materials (1714)
- Civil and Environmental Engineering (1514)
- Applied Mechanics (1202)
- Chemical Engineering (1187)
- Ocean Engineering (1147)
- Computer-Aided Engineering and Design (1010)
- Heat Transfer, Combustion (991)
- Biomedical Engineering and Bioengineering (989)
- Environmental Sciences (959)
- Computer Engineering (958)
- Operations Research, Systems Engineering and Industrial Engineering (913)
- Electro-Mechanical Systems (865)
- Acoustics, Dynamics, and Controls (832)
- Mechanics of Materials (813)
- Structural Materials (807)
- Institution
-
- University of Nebraska - Lincoln (4546)
- Missouri University of Science and Technology (2222)
- California Polytechnic State University, San Luis Obispo (1642)
- Brigham Young University (1342)
- University of Kentucky (1053)
-
- University of Central Florida (1004)
- University of Texas at Arlington (962)
- Michigan Technological University (839)
- Old Dominion University (811)
- University of Texas Rio Grande Valley (657)
- Purdue University (619)
- University of South Carolina (604)
- New Jersey Institute of Technology (568)
- Utah State University (513)
- Universitas Indonesia (508)
- Louisiana State University (452)
- National Taiwan Ocean University (445)
- University of Nevada, Las Vegas (396)
- University of Alabama at Birmingham (381)
- Washington University in St. Louis (376)
- Clemson University (366)
- University of Texas at El Paso (346)
- Portland State University (331)
- The University of Akron (331)
- Cleveland State University (321)
- Wright State University (300)
- University of Arkansas, Fayetteville (299)
- Central Washington University (262)
- Marquette University (253)
- Embry-Riddle Aeronautical University (232)
- Keyword
-
- Engineering (593)
- ASME (395)
- Conference (378)
- ECTC (378)
- Proceedings (378)
-
- Additive manufacturing (333)
- Mechanical Engineering (306)
- Applied sciences (297)
- Buildings (283)
- Optimization (260)
- Gas (253)
- And Energy; Structural Materials; Sustainability (248)
- Energy Systems; Environmental Indicators and Impact Assessment; Environmental Monitoring; Mining Engineering; Oil (248)
- Additive Manufacturing (220)
- Simulation (215)
- CFD (211)
- Design (202)
- Manufacturing (202)
- Department of Mechanical and Materials Engineering (180)
- Heat transfer (172)
- Robotics (165)
- Department of Mechanical Engineering-Engineering Mechanics (151)
- Composites (150)
- Finite element analysis (134)
- Combustion (133)
- Computational fluid dynamics (131)
- Machine learning (131)
- Modeling (131)
- Microstructure (130)
- 3D printing (128)
- Publication Year
- Publication
-
- Nebraska Tractor Tests (3397)
- Theses and Dissertations (1700)
- Mechanical and Aerospace Engineering Faculty Research & Creative Works (1144)
- Mechanical Engineering (972)
- Faculty Publications (763)
-
- Masters Theses (696)
- Mechanical and Aerospace Engineering Theses - Archive (677)
- Electronic Theses and Dissertations (654)
- Department of Mechanical and Materials Engineering: Faculty Publications (620)
- Mechanical Engineering Faculty Publications (618)
- World of Coal Ash Proceedings (578)
- Mechanical & Aerospace Engineering Theses & Dissertations (551)
- FSEC Energy Research Center® (511)
- Theses (465)
- Journal of Marine Science and Technology–Taiwan (445)
- Makara Journal of Technology (440)
- Early Career Technical Journal (ECTJ) (378)
- Open Access Theses & Dissertations (332)
- Master's Theses (315)
- Dissertations, Master's Theses and Master's Reports (277)
- Industrial and Manufacturing Engineering (273)
- Mechanical and Aerospace Engineering Dissertations - Archive (266)
- Dissertations (260)
- Williams Honors College, Honors Research Projects (260)
- LSU Master's Theses (255)
- Doctoral Dissertations (252)
- Mechanical Engineering Design Project Class (242)
- All Undergraduate Projects (226)
- Theses and Dissertations--Mechanical and Aerospace Engineering (221)
- Mechanical Engineering ETDs (200)
- Publication Type
Articles 2851 - 2880 of 29998
Full-Text Articles in Mechanical Engineering
Distributed Conflict Detection And Optimal 4d Trajectory Resolution Leveraging Polynomial Based Methods, Michael Klinefelter, Austin Stone, Joshua Miller, Cameron K. Peterson, John Salmon
Distributed Conflict Detection And Optimal 4d Trajectory Resolution Leveraging Polynomial Based Methods, Michael Klinefelter, Austin Stone, Joshua Miller, Cameron K. Peterson, John Salmon
Student Works
This paper presents a methodology for distributed conflict detection and resolution of aircraft following time-dependent flight paths. We use parametric fifth-order polynomial splines to define the full, time-based paths of vehicles. This representation can be exploited to rapidly detect conflicts and calculate optimal resolution solutions that minimize deviations from the original path. Conflicts are identified using a Sturm sequencing procedure and resolutions are found using gradient-based optimization techniques. Simulations show the locally optimal resolution of complex multi-vehicle conflicts and large-scale scenarios. Also, a method of fitting the flight path model to data sets is presented and flight path trajectories are …
Prediction Of Defects In Deep Drawn Rectangular Parts Using Finite Element Analysis (Fea) And Response Surface Methodology (Rsm), Mustafa M. Semman Eng., Mostafa Shazly, Mohamed H. Gadallah, Tamer Adel Mohamed, Abdallah S. Wifi
Prediction Of Defects In Deep Drawn Rectangular Parts Using Finite Element Analysis (Fea) And Response Surface Methodology (Rsm), Mustafa M. Semman Eng., Mostafa Shazly, Mohamed H. Gadallah, Tamer Adel Mohamed, Abdallah S. Wifi
Mechanical Engineering
Abstract. Deep drawing defects such as thinning and earing present challenges to sheet metal forming industry while designers tend to favour the usage of new materials and production processes. The present work introduces an integrated approach using Design of Experiment, FEA experimentation and RSM to study the effect of deep drawing process parameters and resulting defects associated with sheet metal forming processes such as thinning and earing particularly in deep drawing of non-circular parts. The Design of Experiment (DoE) is used to generate a series of experiments for different process parameters in deep drawn rectangular products which are then simulated …
Infrared Phase-Change Chiral Metasurfaces With Tunable Circular Dichroism, Haotian Tang, Liliana Stan, David A. Czaplewski, Xiaodong Yang, Jie Gao
Infrared Phase-Change Chiral Metasurfaces With Tunable Circular Dichroism, Haotian Tang, Liliana Stan, David A. Czaplewski, Xiaodong Yang, Jie Gao
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Integrating Phase-Change Materials in Meta surfaces Has Emerged as a Powerful Strategy to Realize Optical Devices with Tunable Electromagnetic Responses. Here, Phase-Change Chiral Meta surfaces based on GST-225 Material with the Designed Trapezoid-Shaped Resonators Are Demonstrated to Achieve Tunable Circular Dichroism (CD) Responses in the Infrared Regime. the Asymmetric Trapezoid-Shaped Resonators Are Designed to Support Two Chiral Plasmonic Resonances with OppositeCDresponses for Realizing SwitchableCDbetween Negative and Positive Values using the GST Phase Change from Amorphous to Crystalline. the Electromagnetic Field Distributions of the Chiral Plasmonic Resonant Modes Are Analyzed to Understand the Chiroptical Responses of the Meta surface. Furthermore, the …
Assessing The Benefits Of Electrification For The Mackinac Island Ferry From An Environmental And Economic Perspective, Siddharth Gopujkar, Jeremy Worm
Assessing The Benefits Of Electrification For The Mackinac Island Ferry From An Environmental And Economic Perspective, Siddharth Gopujkar, Jeremy Worm
Michigan Tech Publications
Ferry electrification has gained attention in the last decade as a potential path to reduce greenhouse gas emissions. This study, conducted by APS LABS at Michigan Technological University for the Mackinac Economic Alliance (MEA) and funded by the Michigan Economic Development Corporation (MEDC), looked at the feasibility and potential benefits of electrification of a particular vessel that is part of a ferry service from Mackinaw City, Michigan, USA, to Mackinac Island, Michigan, USA. The study included a comprehensive analysis of the feasibility of retrofitting the current configuration of the ferry into an all-electric ferry based on the availability of components …
Estimation Of Useful-Stage Energy Returns On Investment For Fossil Fuels And Implications For Renewable Energy Systems, Emmanuel Aramendia, Paul E. Brockway, Peter G. Taylor, Jonathan B. Norman, Matthew K. Heun, Zeke Marshal;
Estimation Of Useful-Stage Energy Returns On Investment For Fossil Fuels And Implications For Renewable Energy Systems, Emmanuel Aramendia, Paul E. Brockway, Peter G. Taylor, Jonathan B. Norman, Matthew K. Heun, Zeke Marshal;
University Faculty Publications and Creative Works
The net energy implications of the energy transition have so far been analysed at best at the final energy stage. Here we argue that expanding the analysis to the useful stage is crucial. We estimate fossil fuelsʼ useful-stage energy returns on investment (EROIs) over the period 1971–2020, globally and nationally, and disaggregate EROIs by end use. We find that fossil fuelsʼ useful-stage EROIs (~3.5:1) are considerably lower than at the final stage (~8.5:1), due to low final-to-useful efficiencies. Further, we estimate the final-stage EROI for which electricity-yielding renewable energy would deliver the same net useful energy as fossil fuels (EROI …
A Multi-Material Platform For Imaging Of Single Cell-Cell Junctions Under Tensile Load Fabricated With Two-Photon Polymerization, Jordan Rosenbohm, Grayson Minnick, Bahareh Tajvidi Safa, Amir M. Esfahani, Xiaowei Jin, Haiwei Zhai, Nickolay V. Lavrik, Ruiguo Yang
A Multi-Material Platform For Imaging Of Single Cell-Cell Junctions Under Tensile Load Fabricated With Two-Photon Polymerization, Jordan Rosenbohm, Grayson Minnick, Bahareh Tajvidi Safa, Amir M. Esfahani, Xiaowei Jin, Haiwei Zhai, Nickolay V. Lavrik, Ruiguo Yang
Department of Mechanical and Materials Engineering: Faculty Publications
We previously reported a single-cell adhesion micro tensile tester (SCAμTT) fabricated from IP-S photoresin with two-photon polymerization (TPP) for investigating the mechanics of a single cell-cell junction under defined tensile loading. A major limitation of the platform is the autofluorescence of IP-S, the photoresin for TPP fabrication, which significantly increases background signal and makes fluorescent imaging of stretched cells difficult. In this study, we report the design and fabrication of a new SCAμTT platform that mitigates autofluorescence and demonstrate its capability in imaging a single cell pair as its mutual junction is stretched. By employing a two-material design using IP-S …
Comparative Analysis Of Water-Induced Response In 3d-Printed Scf/Abs Composites Under Controlled Diffusion, Samiul Alam, Md Tareq Hassan, Joshua Merrell, Juhyeong Lee
Comparative Analysis Of Water-Induced Response In 3d-Printed Scf/Abs Composites Under Controlled Diffusion, Samiul Alam, Md Tareq Hassan, Joshua Merrell, Juhyeong Lee
Mechanical and Aerospace Engineering Faculty Publications
Additive manufacturing (AM) or 3D printing of fiber-reinforced composites (FRCs) has garnered significant interests for its versatility in creating intricate parts and rapid prototyping due to cost-effectiveness. Although short fiber-reinforced thermoplastic composites are challenging to manufacture, their mechanical properties are enhanced. However, void formation during printing is a key issue, impacting mechanical properties and facilitating water ingress, affecting long-term durability. This work studies water diffusion characteristics and the associated hydro-aging of 3Dprinted short carbon fiber (SCF)/acrylonitrile butadiene styrene (ABS) composites with controlled water diffusion. Effects of material type (ABS and SCF/ABS), 3D printing path (horizontal and vertical filament orientation), and …
An Integrated Resource Planning Proposal For Tucson Electric Power, Valeria Bernal
An Integrated Resource Planning Proposal For Tucson Electric Power, Valeria Bernal
Master's Projects and Capstones
An integrated resource plan (IRP) is crucial for utilities to determine the most cost-efficient energy resources while considering system reliability, environmental impact, and regulatory requirements. VitalsparK developed an IRP for Tucson Electric Power (TEP) to transition its current 70% thermal and 30% renewable energy portfolio, emitting 740 grams of CO2 per kWh, toward carbon neutrality by 2050. The proposed plan involves retiring existing infrastructure, adding 8 GW of renewable and storage capacity, and incorporating 2.5 GW of net-zero natural gas power plants. VitalsparK presented two scenarios: the Reference (REF) Case, which focuses on the least-cost portfolio to meet demand through …
On The Right Track? Energy Use, Carbon Emissions, And Intensities Of World Rail Transportation, 1840–2020, Bernardo Tostes, Sofia T. Henriques, Paul E. Brockway, Matthew Kuperus Heun, Tiago Domingos, Tânia Sousa
On The Right Track? Energy Use, Carbon Emissions, And Intensities Of World Rail Transportation, 1840–2020, Bernardo Tostes, Sofia T. Henriques, Paul E. Brockway, Matthew Kuperus Heun, Tiago Domingos, Tânia Sousa
University Faculty Publications and Creative Works
The history of rail transport can offer valuable insights for future energy transitions due to its importance in promoting clean mobility. There is a complex interplay between the evolution of the railway network, fuel consumption, efficiency, energy service, and CO2 emissions that requires further exploration. We developed a dataset that covers energy use in all stages of rail transportation, as well as the length of track, energy service, and CO2 emissions at the world scale. To deal with missing data we utilized machine learning techniques for the first time in a historical energy reconstruction study. Our analysis reveals that …
Redesign Of Leg Assembly For Remote Walking Training Device To Improve Gait Kinematics, Jacob Anthony
Redesign Of Leg Assembly For Remote Walking Training Device To Improve Gait Kinematics, Jacob Anthony
Mechanical Engineering Theses
As modern medicine has improved, the average age of patients has increased. This has cause a growing number of patients to develop disabilities over time due to spinal cord injuries and stroke among other neurological ailments. This has led to an increased interest in developing robotic exoskeletons to help patients with neuromuscular rehabilitation. However, most exoskeletons do not accurately replicate the natural human gait kinematics due to a lack of degrees of freedom at the designed knee joint. In this thesis, the leg assembly for a robotic rehabilitation (RoboREHAB) device is redesigned to improve the gait kinematics and a reinforcement …
Structural Dynamics Of The Human Brain In Vivo From Tagged Mri And Mr Elastography, Jordan De Niro Escarcega
Structural Dynamics Of The Human Brain In Vivo From Tagged Mri And Mr Elastography, Jordan De Niro Escarcega
McKelvey School of Engineering Graduate Student Theses & Dissertations
The underlying mechanics surrounding vulnerability of human brains in response to impact is critical to our ability to diagnose and treat traumatic brain injury (TBI), but our understanding of brain mechanical behavior is incomplete. Tagged MRI (tMRI) and magnetic resonance elastography (MRE) are two imaging techniques that are used to visualize and quantify deformation fields in human brains in vivo. The objective of this thesis is to gain a better understanding of brain vulnerability, by quantitively analyzing deformation fields extracted from in vivo human imaging studies. This was achieved through the following aims: (1) Extract mode shapes and natural frequencies …
Application Of Finite-State Wake Models To Rotors Re-Entering Their Own Wake, Michael Seay Morrow
Application Of Finite-State Wake Models To Rotors Re-Entering Their Own Wake, Michael Seay Morrow
McKelvey School of Engineering Graduate Student Theses & Dissertations
This paper details the development of a finite-state, dynamic wake model for the purpose of modeling a helicopter rotor reentering its own wake. This model stems directly from both the Peters-Morillo wake model to determine the velocity field on and above the helicopter rotor and the Peters-Fei model to compute the velocity field below the rotor. The specific case of nonzero net thrust was evaluated under assumptions of axial flow and potential flow theory. Results consist of computations of the inflow velocity for this case, along with comparison to closed-form, potential flow solutions for validation. The finite-state model is shown …
Digital Technologies In The Field Of Outsourcing Logistics Services, Khalikul Shoniyozovich Chariev, Sardor Sobir Ogli Ilkhomov
Digital Technologies In The Field Of Outsourcing Logistics Services, Khalikul Shoniyozovich Chariev, Sardor Sobir Ogli Ilkhomov
Technical science and innovation
This article discusses the problems and prospects of the transport and logistics industry. Outsourcing technology is one of the logistics strategies for managing a company, which, in order to improve logistics efficiency, involves transferring some business functions or parts of business processes to a third-party contractor (outsourcing company). The possibilities of using information technologies in the development of digital logistics are studied and scientific, methodological and practical proposals and recommendations are presented. This abstract explores the impact of digital technologies such as blockchain, Internet of Things (IoT), artificial intelligence (AI), and big data analytics on 3PL logistics services. It discusses …
Regular Algorythms For Synthesis Of Optimal Control Systems For Dynamic Objects, Igamberdiyev Husan, Uktam Farkhodovich Mamirov, Xankeldiyeva Zebiniso
Regular Algorythms For Synthesis Of Optimal Control Systems For Dynamic Objects, Igamberdiyev Husan, Uktam Farkhodovich Mamirov, Xankeldiyeva Zebiniso
Technical science and innovation
The article presents algorithms for the synthesis of an optimal control system for dynamic objects. As a model, we consider a differential equation of a continuous one-dimensional system in the form of a state space, which has the properties of controllability and observability. The paper shows the need to use an observation device in order to assess how the properties of the controlled system change with the slightest change in the parameters of the control object, to assess the sensitivity of the system to these changes. When finding a solution to the equation formulated to find the parameters of the …
Effects Of Ti Addition On The Characteristics Of Al-10zn-6mg-2si/Zro2 Composites Produced By Squeeze Casting, Qesha Diva Prameshvara, Pipin Indah Lestari, Bondan Tiara Sofyan
Effects Of Ti Addition On The Characteristics Of Al-10zn-6mg-2si/Zro2 Composites Produced By Squeeze Casting, Qesha Diva Prameshvara, Pipin Indah Lestari, Bondan Tiara Sofyan
Journal of Materials Exploration and Findings
Metal matrix composite (MMC) with 7xxx aluminum matrix is potential for ballistic applications due to the combination of strength, toughness, and light weight. Previous study successfully produced aluminum-based composites with SiC particles which were able to stop type III bullet, however cracks remained on back of the plate. Therefore, in this research, SiC was replaced by zirconia (ZrO2) due to its high fracture toughness. Ti-B grain refiner was added to further improve toughness through grain boundary strengthening mechanism. This research developed 5 vol.% ZrO2 strengthened Al-10Zn-6Mg-2Si composite with addition of Al-5Ti-1B grain refiner produced through squeeze casting …
Integration Of The Ashby Technique And Pahl-Beitz Quantitative Ranking For Railway Axle Material Selection, Helya Chafshoh Nafisah, Jaka Fajar Fatriansyah, Siti Norasmah Surip
Integration Of The Ashby Technique And Pahl-Beitz Quantitative Ranking For Railway Axle Material Selection, Helya Chafshoh Nafisah, Jaka Fajar Fatriansyah, Siti Norasmah Surip
Journal of Materials Exploration and Findings
Railway axle serves as a vital connection between the train's wheels and its body. However, cyclic loading and high speed can induce fatigue in railway axle, which potentially leads to damage human safety. Therefore, it is important to find materials that have good mechanical properties with the lowest weight and cost. In this paper, a comprehensive method using Ashby chart has been performed to select candidate materials of railway axle. The methods begin with analyzing function by determining the problem, objective function, and constraints. After that, the results obtained are ranked using Pahl and Beitz quantitative weighting method. The results …
Study On Human Integrity Management System Maturity Level For Supporting Asset Integrity And Process Safety Implementation, Anggiat M. Sihotang, Dedi Priadi, D. Rizal Asral
Study On Human Integrity Management System Maturity Level For Supporting Asset Integrity And Process Safety Implementation, Anggiat M. Sihotang, Dedi Priadi, D. Rizal Asral
Journal of Materials Exploration and Findings
The human factors (HF) are recognized as one of critical process safety barriers involved in normal and abnormal conditions in the oil and gas industry. In order to strengthen the HF roles as barriers we need to ensure that the actions generated are based on a valid risk assessment of the operation to be addressed by a relevant human factor analysis. Organizations within the oil and gas process have made much progress in understanding and implementing HF improvement programs. However, organizations are not always clear about what are their current situations in managing HF, their priorities for HF to be …
Analysis Of The Effect Of Different Surface Preparation Methods On Corrosion Resistance And Adhesion Strength Of Astm A36 Steel Substrate With Surface Tolerant Epoxy Paint As Coating Material, Irwan Wijaya Santoso, Daffa Aqila, Rini Riastuti, Rizal Tresna Ramadhani
Analysis Of The Effect Of Different Surface Preparation Methods On Corrosion Resistance And Adhesion Strength Of Astm A36 Steel Substrate With Surface Tolerant Epoxy Paint As Coating Material, Irwan Wijaya Santoso, Daffa Aqila, Rini Riastuti, Rizal Tresna Ramadhani
Journal of Materials Exploration and Findings
In the industrial world, to extend the service life of materials, protection methods are carried out to slow down the material's corrosion rate. The protection method that is often used is the coating method. The coating method is a protection method by coating the substrate material using a coating material to prevent contact between the substrate material and the environment. In this research, the substrate material used is ASTM A36 steel and the coating material used is Surface Tolerant Epoxy paint. The independent variable used in this study lies in the surface preparation method which consists of: solvent cleaning, hand …
Fitness For Service (Ffs) And Fatigue Assessment For Shell Distorted Steel Storage Tank Based On Api 579-1/Asme Ffs-1, Wira Herucakra Sr. Structure Engineer, Luh Putri Adnyani, Ic Farid Hadi Prasetyo, Alviani Rahma Rizkhita
Fitness For Service (Ffs) And Fatigue Assessment For Shell Distorted Steel Storage Tank Based On Api 579-1/Asme Ffs-1, Wira Herucakra Sr. Structure Engineer, Luh Putri Adnyani, Ic Farid Hadi Prasetyo, Alviani Rahma Rizkhita
Journal of Materials Exploration and Findings
A shell distortion was occurred due to incorrect in the welding procedure during construction of a new built above ground steel storage tank. The assessment level 1 then performed referred to original construction code of API Standard 650 was performed, the roundness data of tank plate was obtained through to laser scanning survey, and the result on assessment level 1 known that the minimum radius of measured point is exceeding the radius tolerance. This unacceptable condition of assessment level 1 requires to be performed the higher level of assessment. A fitness for service assessment level 3 for tank 1000 KL …
Recovery Of Cyber Manufacturing Systems From False Data Injection Attacks On Sensors By Reinforcement Learning, Romesh Prasad
Recovery Of Cyber Manufacturing Systems From False Data Injection Attacks On Sensors By Reinforcement Learning, Romesh Prasad
Dissertations - ALL
Cyber-manufacturing systems (CMS) represent the future design vision for manufacturing systems, aiming to enhance product quality, and productivity, and reduce downtime. The third industrial revolution was driven by computer systems and automation, while the fourth industrial revolution was inspired by the internet, network, and connectivity. However, this integration also introduces vulnerabilities, particularly through false data injection attacks on sensors. Sensors play a pivotal role in the automation framework of manufacturing systems spanning five levels: process, operational, supervisory, plant, and enterprise. Sensors are instrumental in communicating information from the process level to the enterprise level. It also enables controllers at the …
Urban Scale Vehicle-To-Building-To-Grid Integration Leveraging Human Mobility Modeling, Yapan Liu
Urban Scale Vehicle-To-Building-To-Grid Integration Leveraging Human Mobility Modeling, Yapan Liu
Dissertations - ALL
In the United States (U.S.), the buildings sector consumes about 76% of electricity use and 40% of all primary energy use and associated greenhouse gas emissions. Occupant behavior, which includes the presence of people in the space, interactions between the occupant and building systems, and occupant adaptations to the built environment, has a significant impact on the energy consumption of buildings. Many researchers have investigated occupant behaviors at a single building scale, however, very few studies have been conducted at the community scale or urban scale. Our previous review study introduced human mobility modeling approach from other domains into the …
The Mechanism By Which Thermal Coupling Leads To An Asymptotic Maldistribution Stability Boundary For Flow Boiling In Parallel Microchannels, Md Emadur Rahman, Justin A. Weibel
The Mechanism By Which Thermal Coupling Leads To An Asymptotic Maldistribution Stability Boundary For Flow Boiling In Parallel Microchannels, Md Emadur Rahman, Justin A. Weibel
CTRC Research Publications
Phase change heat transfer processes are attractive for the efficient thermal management of advanced semiconductor devices, with flow boiling in parallel microchannel heat sinks being one promising solution. However, there are several implementation challenges associated with two-phase flow in parallel microchannels, particularly flow maldistribution, which can adversely affect performance and reliability. Two-phase flow models can be useful in predicting and understanding the instability mechanisms that leads to maldistribution, such that parametric performance trends and safe regions of operation can be identified. Channel-to-channel thermal coupling has been shown to alleviate maldistribution, but it is not yet understood why this effect is …
Investigating The Effects Of Suspended Algal Content, Dissolved Oxygen, And Temperature On A High-Frequency Acoustic Attenuation System In A Controlled Laboratory Environment, Noah Watson
Honors Theses
The Single Frequency Acoustic Attenuation System (SFAAS) has been developed at the National Center for Physical Acoustics (NCPA). This system uses acoustic methods to monitor fine suspended sediment concentration in streams. Site-specific calibrations are necessary for this system, and previous research has indicated that algal concentration or dissolved oxygen concentration of water may affect collected data. Temperature, dissolved oxygen concentration, and fluorescence, used as a proxy for algal concentration, were monitored during this system’s use, and calibrations were derived to account for the effect of each of these variables on acoustic measurements. It has been shown that temperature has a …
Nhrl Competition Combat Robot, Cale Holan
Nhrl Competition Combat Robot, Cale Holan
Honors College Theses
The overall objective of this senior design project is for a group of 5 engineers to design and build a National Havoc Robot League (NHRL) qualified combat robot. The design was split into five core systems: chassis, weapon, drivetrain, armor, and electronics. This research will specifically focus on the structural design and fabrication of the robot’s chassis, which is the frame of the robot that houses all systems and internals. The research will also work closely with each branch of the robot to establish the internal bot infrastructure and how each design facet comes together and is secured. Additionally, some …
Heat Sink Integrating Phase Change Materials For Cooling High Power Electronic Devices, Mohammad Sameer Qasem
Heat Sink Integrating Phase Change Materials For Cooling High Power Electronic Devices, Mohammad Sameer Qasem
Thesis/ Dissertation Defenses
This research explores the numerical analysis of phase change materials (PCMs) heat sinks, focusing on high heat flux dissipation applications, e.g. electronics cooling. Both 2D and 3D numerical models using gallium and paraffin RT31 as PCMs are considered within a heat sink design framework featuring a rectangular cavity and dual opposing vertical copper walls serving as fins to dissipate heat from the hot sink base that receives heat from the heat source. The inclusion of a Triply Periodic Minimal Surface (TPMS) ‘Primitive’ structure as an in-fill thermal conductivity enhancer (TCE) in the case of the gallium heat sink, and a …
Autonomous Bottling And Packaging System - Mechanical Bottling Portion, Kathryn Gray
Autonomous Bottling And Packaging System - Mechanical Bottling Portion, Kathryn Gray
Honors College Theses
This report details the complete mechanical design of an autonomous bottling automation system. This system is fully integrated with a bottling and packaging system. The scope of the full project is to successfully bottle and cap twelve small bottles (approximately 68 cm3) in under three minutes and thirty seconds. The bottles shall be filled with an “electrolyte” and water mixture, and the mixture should be fully mixed. To complete this task, two tanks will dispense liquid (one electrolyte, and one water) into the bottles. Each tank shall have a measuring chamber, that will fill with the correct amount of volume …
Creating A Collapsible Sling Lift Capable Of Transporting Patients Between Various Locations, Cameron Delaney Hillman, Macey Jewell Ross, Lydia Noel Miller
Creating A Collapsible Sling Lift Capable Of Transporting Patients Between Various Locations, Cameron Delaney Hillman, Macey Jewell Ross, Lydia Noel Miller
Honors Theses
As Senior Biomedical Engineering students at the University of Mississippi, we, Lainey Hillman, Lydia Miller, and Macey Ross, are required to complete a final senior capstone for our department. This project aims to provide a solution to a current unmet clinical need in the healthcare industry, thus our team sought to improve the lack of transportability of sling lifts. The current sling lifts on the market display numerous issues: heavy, bulky, use confined to certain areas, and use specific for only one type of transportation. To combat these problems, we designed a sling lift that was lightweight, collapsible, safe, and …
The Effects Of Uv Degradation On Polycarbonate Plastics Under Dynamic Compressive Loading, Hannah Bradford
The Effects Of Uv Degradation On Polycarbonate Plastics Under Dynamic Compressive Loading, Hannah Bradford
Honors Theses
The objective of this experiment was to analyze the dynamic properties of polycarbonate plastics subjected to accelerated ultraviolet (UV) exposure. This was done by subjecting rods of polycarbonate plastic to UV degradation in a QUV accelerated weathering machine for 375, 750, and 1500-hours. These rods were then tested under dynamic compression using a Split-Hopkinson Pressure Bar at an average strain rate of 1600/s. The Split-Hopkinson pressure bar works by rapidly compressing a sample between 3 axial rods sending an elastic wave through the sample. The strain gauges on the incident rod and the transmission rod transformed the elastic wave deformation …
Creating A Collapsible Sling Lift Capable Of Transporting Patients Between Various Locations, Macey Jewell Ross, Cameron Delaney Hillman, Lydia Noel Miller
Creating A Collapsible Sling Lift Capable Of Transporting Patients Between Various Locations, Macey Jewell Ross, Cameron Delaney Hillman, Lydia Noel Miller
Honors Theses
As Senior Biomedical Engineering students at the University of Mississippi, we, Lainey Hillman, Lydia Miller, and Macey Ross, are required to complete a final senior capstone for our department. This project aims to provide a solution to a current unmet clinical need in the healthcare industry, thus our team sought to improve the lack of transportability of sling lifts. The current sling lifts on the market display numerous issues: heavy, bulky, use confined to certain areas, and use specific for only one type of transportation. To combat these problems, we designed a sling lift that was lightweight, collapsible, safe, and …
Emulsion Stability, Rheological Properties, And Combustion Characteristics Of Waterjojoba Biofuel Emulsion, Ihab Mohamed Ayad
Emulsion Stability, Rheological Properties, And Combustion Characteristics Of Waterjojoba Biofuel Emulsion, Ihab Mohamed Ayad
Thesis/ Dissertation Defenses
This thesis comprehensively investigates the stability, rheological properties, and engine performance implications of water in jojoba biodiesel (WJBD) emulsion. The research delves into multiple aspects, including the influence of diverse surfactants and water concentrations on emulsion stability. It also yields valuable insights into the development of stable water in jojoba biodiesel emulsions, specifically tailored for diesel engines. These insights contribute significantly to the body of knowledge of positioning emulsion fuels as viable alternative to traditional diesel fuels. The anticipated benefits include notable reductions in emissions. Importantly, this study underscores the critical importance of considering emulsion stability, both during storage and …