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As the only high temperature superconductor with round wire (RW) geometry, Bi2Sr2CaCu2O8+x (Bi-2212) superconducting wire has the advantages of being multi-filamentary, macroscopically isotropic and twistable. With overpressure (OP)...
Energy crises have been a major problem in Pakistan for many years. The country, which became independent in 1947, has struggled to meet the gap between the demand and supply of electricity. The electricity demand, as in most countries, ...
Understanding Slow Dynamics in Polymers Using Coarse-Grained Molecular Dynamics Simulations: Microphase Separation in Block Copolyelectrolytes and Photo-Switching in Azobenzene-Polymers
Tracking slow dynamics in polymers is very challenging using all-atomistic molecular dynamics simulations due to the vast range of time scales involved. Therefore, there are urgent needs to develop coarse-grained modeling schemes to meet...
This dissertation describes the propagation of near atmospheric nitrogen gas that rushes into a liquid helium cooled vacuum tube after the tube suddenly loses vacuum. The loss-of-vacuum scenario resembles accidental venting of...
Electromagnets are an important application of superconductivity as superconductors can provide large current density in the winding pack without any voltage drop or joule heating losses. High temperature superconducting (HTS) magnets...
The National Aeronautics and Space Agency (NASA) is working toward going back to the moon and beyond. Currently they are developing a dewar that can store liquid hydrogen (LH2) and liquid oxygen (LO2) in space so the capsule may refuel...
Superconducting power devices require cable terminations to intercept the heat inleaks from the ambient temperature, thus, maintaining the superconducting cable within operating cryogenic temperature limits. Owing to the possible safety...
This doctoral dissertation pertains to the study of heat transfer, fluid-structure-thermal interactions, buoyancy-driven flows, and the numerical modeling techniques needed to systematically study the different problems related to these...
A dynamic three-dimensional volume element model (VEM) of a parabolic trough solar collector (PTC) comprising an outer glass cover, annular space, absorber tube, and heat transfer fluid is studied with detail. The model is coupled with...
High temperature pressure sensing is desirable for a broad range of applications related to re-entry of space vehicles and control of combustion processes; however, limited materials can sustain temperatures above 1000C while under time...
Several animals build structures to shield themselves from external threats. In some species, however, the function of these constructions goes way beyond that of a simple physical barrier. The odd-shaped mounds created by soil termites...
Thermoelectric materials hold tremendous promise for advances in fundamental science and practical applications; particularly for robust electricity generation in extreme and remote environments. However, for most materials, the energy...
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