Mechanical Engineering Commons^™

Simulation Of Particle Transport In A Multi-Component Flow With A High Viscosity Ratio Driven By Slender Structures, Michael Roeing-Donna

Graduate Research Theses & Dissertations

Simulating particle transport in multi-component fluid flows driven by slender structures is important but challenging, especially when dealing with large viscosity ratios. In this thesis, a general multi-physics model is introduced to handle multi-component fluid flows, slender beating structures, immersed particles/droplets, and their interactions. This multi-physics model has been validated with analytical solutions and other published experimental and numerical results for the mean mucous velocity. The validated model is used to study particle transport in nasal mucous layer, the interplay between cilia and fluid flow. The model shows that mucous-pericilairy layer interface and mucous-air interface remain a constant height throughout …

Warm Unit Rod Movement Stand For Proton Improvement Project Ii, Christopher Shohei Becker

Graduate Research Theses & Dissertations

Fermilab is responsible for many experiments involving proton acceleration and requires a significant upgrade to its linear accelerator infrastructure to meet the needs of the 21st century high energy physics. The Proton Improvement Project II (PIP II) is a plan to allow Fermilab to maintain its title of most intense accelerator by doubling the output of its proton beam to 800 MeV. An array of high frequency cryomodules generate the beam but are limited in total manufacturing lengths. To connect the multiple devices, a combination of magnets and ion vacuum pumps at room temperature -- therefore called warm units -- …

A Dynamic Active Noise Control System For Live Music Attenuation, Elliot James Krueger

Graduate Research Theses & Dissertations

This thesis proposes a system design that will be suitable for applying active noise control (ANC) effectively to live musical instruments. The design consists of three parts: a signal separation section, an instrument classification section, and the active noise control section. The signal separation section will split up the music signals. The instrument classification section will identify the signals, and the ANC section will attenuate the music signal based on the previous information from the other sections. The two instruments of focus will be the trombone and tuba for their low frequency and ability to be quite loud in a …

A Theory-Supported Machine Learning Model For The Prediction Of Melt Pool Geometry And Optimal Process Window In Metal Additive Manufacturing, Sina Tayebati

Graduate Research Theses & Dissertations

Direct Energy Deposition (DED) is an additive manufacturing (AM) process capable of producing complicate-shaped or functionally graded components, and it is getting intense attention as a revolutionary technology to satisfy high demand in manufacturing process for the aerospace, automotive, and medical industries. However, the repeatability in geometries and properties of fabricated products is one of the most challenging issues for the DED process to be fully utilized, requiring comprehensive understanding of effect of processing conditions on the properties of fabricated parts, and development of relations among those conditions and properties. That is the motivation of this research. In this study, …

Modeling Study Of Electrocoagulation System For Treating Wastewater, Swachwa Dey

Graduate Research Theses & Dissertations

Effective treatment of wastewater from households, communities, and industries is vital to preserve our environment. Chemical treatment to add coagulants into the wastewater is the most popular treatment method, but due to the high operating cost and secondary contamination issue, a novel method to solve those issues is required. In this study, we revisited the electro-coagulation (EC) system which has promising features of low system/operating cost and environment friendly process. EC was actively developed once, but due to the low efficiency and scaling-up issues, it could not be fully utilized. In this study, physics-based mathematical model was developed to elucidate …

Thermal/Structural Analysis Of The Axion Quantum Metrology Cavity And Its Components, Tyler Funk

Graduate Research Theses & Dissertations

This research was centered around maximizing the capability to cool dielectric material within a containment unit, or Photonic Band Gap (PBG) cavity, designed for detecting axion dark matter and identifying the unit’s thermal properties. There are multiple types of PBG cavities, but the latest version that axion researchers wish to use has been theorized to contain possible issues related to its thermal properties. Thermal conductivity is an issue with the dielectric material because it is made from alumina which is highly insulative. This is important since the research is being done in a cryogenic environment and the thermal noise affects …

Application Of Data And Geospatial Analysis In Energy And Health Systems, Ali Faghani

Graduate Research Theses & Dissertations

Having sustainable energy and health systems are the main factors in the vision plan of every country. Both of these systems are correlated with a variety of frameworks, including social, physical, technological, political, and economic factors. Therefore, different types of analytics methods can be implemented to develop the required assessments for those who make plans since understanding the effect of such factors individually, also their interactions, and the overall effect is crucial. With this regard, applications of data analysis and geospatial techniques in both energy, and health systems have recently gained attention. The proposed research here deployed advanced data analytics …

Microfluidics Design Considering Hyperuniformity And Cell Transport In Flow For Improved Circulating Tumor Cell Capture Efficiency, Michael Clarence Hood

Graduate Research Theses & Dissertations

Isolation of circulating tumor cells (CTCs) from patient derived blood samples for cancerdiagnostics and monitoring is challenging due to the extremely low CTC concentration. This thesis work evaluates the performance of passive microfluidics devices with different designs based on computational modeling. A new cell separation method is proposed based on velocity differentiation of varying cell sizes. All numerical studies were conducted in 2D based on a fluid structure interaction code where the fluid flow was solved based on the lattice Boltzmann method (LBM) implemented in Palabos, and the cell dynamics were simulated based on the molecular dynamics package LAMMPS, with …

Rebuild The Niu Split-Hopkinson Pressure Bar Apparatus For High Strain Rate Tensile Test, Dian Li

Graduate Research Theses & Dissertations

A Split-Hopkinson apparatus is a device used to dynamically test material properties for constructing constitutive model and can be used for high strain rate deformation research and experiments. NIU currently has a Split-Hopkinson apparatus that can conduct compressive tests only. The goal of this thesis is to redesign and rebuild the existing apparatus, so the high strain rate tensile tests can be conducted.

Multi-improvements were applied to the Split Hopkinson apparatus in order to improve its working performance. For conducting high strain rate tensile test, the Split-Hopkinson system has been rebuilt with a load-inversion device. The load-inversion device was designed …

Coaxially Electrospun Fibrous Polymer Scaffolds For Tissue Regeneration And Drug Delivery, Matthew Michael Kleszynski

Graduate Research Theses & Dissertations

A biomaterial is a substance that is specifically engineered to take on a role within the body, either alone or in conjunction with other materials, with the purpose of influencing the body. Using Polymers as a biomaterial is an exciting field of study that has the potential to further our abilities to help those in need. Creating composite nanofibrous scaffolds composed of hydrophobic and hydrophilic polymers may outperform structures made of a single polymer in both in vitro and in vivo environments. Hydrophilicity governs the behavior of polymers in the body and has influence over the mechanical properties of the …

Blood Flow Simulation In A Microvascular Network, Kacper Ostalowski

Graduate Research Theses & Dissertations

Cardiovascular disease such as heart attack or stroke has been the leading cause of death in the US for over 100 years. Understanding the blood cell transport physics in a vascular network is important in both fundamental research and clinical practices. In this study, 3Dnumerical simulations on blood flow in a complex retina vascular network were performed considering deformable red blood cells (RBCs), white blood cells (WBCs), and obstructed vessels. The blood was modeled as a mixture of RBCs and WBCs suspended in fluid. The fluid was solved using the lattice Boltzmann method (LBM), and blood cells were modeled by …

Developing A Standard Platform To Predict The Drag Coefficient Of Irregular Shape Particles, Amin Roostaeehosseinabadi

Graduate Research Theses & Dissertations

Solid-fluid interactions are commonly observed in natural transport phenomena and industrial applications such as sedimentation in rivers and pneumatic and hydraulic conveying of coarse particles. Here particle and fluid motion affect each other through force interactions, especially via drag force. To evaluate the magnitude of the drag force first the drag coefficient (CD) of the particle needs to be measured mostly experimentally. The CD depends on the particle’s geometry (i.e., shape, dimension, …) and the properties of the fluid medium. Since the solid particles commonly observed in nature or used in industrial setups come with irregular shapes, finding a relation …