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Full-Text Articles in Physics
Studies Of Spatial Clustering Of Inertial Particles In Turbulence, Ewe Wei Saw
Studies Of Spatial Clustering Of Inertial Particles In Turbulence, Ewe Wei Saw
Dissertations, Master's Theses and Master's Reports - Open
We present studies of the spatial clustering of inertial particles embedded in turbulent flow. A major part of the thesis is experimental, involving the technique of Phase Doppler Interferometry (PDI). The thesis also includes significant amount of simulation studies and some theoretical considerations. We describe the details of PDI and explain why it is suitable for study of particle clustering in turbulent flow with a strong mean velocity. We introduce the concept of the radial distribution function (RDF) as our chosen way of quantifying inertial particle clustering and present some original works on foundational and practical considerations related to it. …
Electronic Properties Of Zig-Zag Carbon Nanotubes : A First-Principles Study, Pavan Kumar Valavala
Electronic Properties Of Zig-Zag Carbon Nanotubes : A First-Principles Study, Pavan Kumar Valavala
Dissertations, Master's Theses and Master's Reports - Open
Carbon nanotube (CNT) is a one dimensional (1-D) nanostructured material, which has been the focal point of research over the past decade for intriguing applications ranging from nanoelectronics to chemical and biological sensors. Using a first-principles gradient corrected density functional approach, we present a comprehensive study of the geometry and energy band gap in zig-zag semi-conducting (n,0) carbon nanotubes (CNT) to resolve some of the conflicting findings. Our calculations confirm that the single wall (n,0) CNTs fall into two distinct classes depending upon n mod 3 equal to 1 (smaller band gaps) or 2 (larger gaps). …