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Full-Text Articles in Mechanical Engineering
Non-Circular Hydraulic Jumps Due To Inclined Jets, Ahmed Mohamed Abdelaziz
Non-Circular Hydraulic Jumps Due To Inclined Jets, Ahmed Mohamed Abdelaziz
Electronic Thesis and Dissertation Repository
When a laminar inclined circular jet impinges on a horizontal surface, it forms a non-circular hydraulic jump governed by a non-axisymmetric flow. In this thesis, we use the boundary-layer and thin-film approaches in the three dimensions to theoretically analyse such flow and the hydraulic jumps produced in such cases. We particularly explore the interplay among inertia, gravity, and the effective inclination angle on the non-axisymmetric flow.
The boundary-layer height is found to show an azimuthal dependence at strong gravity level only; however, the thin film thickness as well as the hydraulic jump profile showed a strong non-axisymmetric behaviour at all …
3d Printing Technology Applied In Lithium Metal Batteries: From Liquid To Solid., Xuejie Gao
3d Printing Technology Applied In Lithium Metal Batteries: From Liquid To Solid., Xuejie Gao
Electronic Thesis and Dissertation Repository
Li-metal batteries are strongly considered to be one of the most promising candidates for high energy density energy storage devices in our modern society. However, the state-of-the-art Limetal batteries are still limited by several challenges including 1) low energy/power density; 2) Li dendrite growth; 3) low coulombic efficiency, and 4) safety concerns within the liquid electrolyte. This thesis mainly focuses on addressing these challenges by using a 3D printing technique to realize high energy/power density Li-metal batteries.
A self-standing high areal energy density cathode for Li-S battery was developed by the 3D printing method in the first part. The optimized …