Sökning: "critical velocity"
Visar resultat 16 - 20 av 132 avhandlingar innehållade orden critical velocity.
16. Interface Defeat and Penetration: Two Modes of Interaction between Metallic Projectiles and Ceramic Targets
Sammanfattning : Ceramics constitute an important group of low-density armour materials. Their high intrinsic strength makes it possible to design ceramic armour systems capable of defeating projectiles directly on the ceramic surface. LÄS MER
17. Performance of image-based velocimetry in river flow – Large Scale PIV and PTV
Sammanfattning : River flow velocity is critical information for hydraulic and hydrological applications. Monitoring flow fields in near-plant waterways and river reach has wide engineering applications insustainable hydropower generation. LÄS MER
18. Modelling and Simulation of Turbulent Gas-Solid Flows applied to Fluidization
Sammanfattning : Modelling of gas-solid suspensions has been studied with emphasis on suitable closure laws. A study of characteristic time scales and energy dissipation mechanisms is made for the case of a simple shear flow. Applications of the modelling are presented in the form of simulation and validation of experiments in fluidized beds. LÄS MER
19. Almost-axial impact on elastic and viscoelastic cantilever columns
Sammanfattning : Almost-axial impact between a rigid body and a cantilever column is studied. A preliminary study of the contact process is presented for a flat-ended impacting body and a flat-ended elastic Timoshenko column with rectangular cross-section. The equations of motion pertaining to the column are solved using an explicit finite difference method. LÄS MER
20. Applications of the golden angle in cardiovascular MRI
Sammanfattning : The use of radial trajectories has been seen as a potential solution to highly efficient cardiovascular magnetic resonance imaging (MRI). By acquiring a broad range of spatial frequencies per repetition time, the acquisition is time-efficient and robust against motion. LÄS MER