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Showing 1 to 20 of 455 for “"Phase change"”.
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Transient phase change effect in phase change memory devices
Phase change random access memory (PCRAM) is a leading contender for next generation nonvolatile memory. The phase change mechanism from high resistance amorphous phase to low resistance crystalline phase in nano-timescale is the most important characteristic of these materials. However, full …
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Transient Phase-Change Effect in Phase-Change Memory Devices
Phase-change random access memory (PCRAM) is one of the next-generation memories with the most potential due to its many good characteristics, such as nonvolatility, high endurance and long data retention. PCRAM has the potential to replace flash memory, which has limited durability and speed. …
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Dynamical Phase-Change Phenomena
Matter on earth exists mostly in three different phases of solid, liquid, and gas. With extreme amounts of energy, temperature, or pressure, a matter can be changed between the phases. Six different types of phase-change phenomena are possible: freezing (the substance changes from a liquid to a …
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Uniaxial optical phase change metamaterials
… range of operation. By incorporating optical phase change materials, materials with outstanding optical contrast upon a solid-state phase transition, more control over the optical modulative properties of metamaterials can be achieved. In this paper, Ge₂Sb₂Te₅ (GST) is chosen as a model phase …
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Semi-Analytic Methods in Phase Change Problems
Made available in DSpace on 2017-07-06T18:59:37Z (GMT). No. of bitstreams: 3 Zahakaylo_David_R_MS.pdf: 27028391 bytes, checksum: 2c886ffcadfd9437603adc1264ebc122 (MD5) Zahakaylo_David_R_MS_ABS.pdf: 373260 bytes, checksum: c01dc7bdd58b1243bad24c34f0bcd4f4 (MD5) license.txt: 4813 bytes, checksum: …
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Off-peak cooling using phase change material
… thermal storage medium is a sodium sulfate-based phase change material (PCM) enclosed in small thin bags. These bags are distributed throughout the ceiling plane of the building; supported by special ceiling tiles. At night, the PCM is charged by chilling the plenum space; during the day, the PCM, …
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Phase-field Modeling of Phase Change Phenomena
The phase-field method has become a popular numerical tool for moving boundary problems in recent years. In this method, the interface is intrinsically diffuse and stores a mixing energy that is equivalent to surface tension. The major advantage of this method is its energy formulation which makes …
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Thermal Performance of Microencapsulated Phase Change Material Slurry
… to prevent a large amount of supercooling of the phase change material. Other experimental results indicate that MPCM slurry's heat transfer coefficient and apparent specific heat are affected significantly by the phase change process and the slurry mass fraction. The study also examines the …
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Evaluation of phase change materials for reconfigurable interconnects
… interconnect vias using an indirectly heated phase change material is evaluated. Process development and materials investigations are examined. Devices capable of multiple cycles between on/off states for reconfigurable applications have been successfully demonstrated in a standard …
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Dynamics and rheology of soft phase-change materials
… materials in which one component can undergo a phase transition leading to the appearance of a solid phase dispersed in a liquid-like continuous phase. Examples of soft phase-change materials can be found in a variety of applications from food products (e.g., organogels, casein gels and …
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Thermal Management Using Liquid-vapor Phase Change in Nanochannels
… in the field of thermal management employing phase-change heat transfer. Comprehending the phenomena of wicking and liquid-vapor phase-change in micro/nano structured surfaces are key aspects towards advancing heat transfer solutions. In this work, fundamental understanding of droplet wicking, …
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Numerical Framework for Simulating Multiphase Flows with Phase Change
… process. As combustion occurs in the gas phase, a liquid fuel must vaporize before combustion can occur. The current dissertation demonstrates a computational framework for simulating such a vaporizing flow. The framework is built from the ground up starting from the laws of conservation …
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Domain-specific accelerators using optically-addressed phase change memory
… Among various solutions, optically-addressed phase change memory (OPCM) has emerged as a promising candidate, offering high computational and communication throughput, along with processing-in-memory (PIM) capabilities. However, OPCM also presents unique challenges-such as high programming …
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Enhanced phase change heat transfer through advanced fabrication techniques
Phase change heat transfer is an essential phenomenon occurring both in nature and in our daily lives. The natural abundance along high latent heat makes water the most widely used fluid for several applications. Industries involving thermoelectric power generation, filtration, desalination, and …
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Phase change phenomena on water repelling and biphilic surfaces
This Dissertation was approved for publication on 2019-04-10 at 09:54.
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Additive Manufacturing for Phase Change Thermal Energy Storage and Management
<p>Phase change materials can enhance the performance of energy systems by time shifting or reducing peak thermal loads. Certain electronic devices such as batteries, laser systems, or electric vehicle power electronics are highly transient and require pulse heat dissipation. Heat sinks, or thermal …
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Performance of phase change cementitious composites with self-heating capacity
… sector being a significant contributor. Phase Change Materials (PCM) are introduced in construction to store heat energy and regulate temperature, reducing the reliance on air conditioners. Concrete is an ideal carrier for PCM, making PCM concrete a promising solution for energy savings …
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