etd AT Indian Institute of Science: Recent submissions
Now showing items 681-700 of 8174
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Geometric modeliing using slice representation
The thesis addresses mainly two issues in geometric modeling, high-level modeling techniques and reconstruction. High-level modeling techniques essentially include boolean operations on objects with same as well as different ... -
Experimental studies on travelling bubble cavitatin noise
An effectively controlled uniform travelling bubble cavitation was made possible at almost all freestream conditions by seeding the flow with artificial nuclei generated by electrolysis within the boundary layer of three ... -
Stress analysis of spinning discs and shells
This thesis is concerned with the stress analysis of isotropic and orthotropic spinning discs and shells. The shell geometries considered in this thesis are: spherical shallow shell, conical shell, and cylindrical shell. ... -
Extended finite simulations of cohensive crack propagation under mode-3 loading
Modeling of propagating discontinuities (cracks) is a challenging problem in the field of computational mechanics. Numerical techniques such as Finite Difference Method (FDM), Boundary Element Method (BEM), and Finite ... -
Lossless collisions and complex behaviour in simple impacting systems
Humans have always tried to take cues from the animal kingdom, incorporating ideas into their creations, either w ith an intention o f devising a new one or making the existing ones better. Animal locomotion not only ... -
Thin film flows : integral methods and experiments on the circular hydraulic jump
This work is an integral analysis of radial and planar thin liquid film flows and an experimental study on the circular hydraulic jump on a circular horizontal plate. These thin film flows are obtained either by the ... -
Measurement of temperature in low velocity high temperature gas streams
Many investigations have been conducted for the development of suitable devices for the measurement of gas temperature in the field of gas turbines and jet propulsion. Each of the methods developed is suitable for a certain ... -
Stability of unbounded and bounded granular shear flows
Recent computer simulations of granular flows (Hopkins & Louge 1991; Goldhirsch, Kui & Zanetti 1993) have identified an interesting picture of cluster formation. In this thesis, we have attempted to explain particle ... -
Towards the concepts of hydrodynamic cavition control
A careful study of the existing literature available in the field of cavitation, reveals the potential of ultrasonics to be used as a tool for controlling and, if possible, eliminating hydrodynamic cavitation through the ... -
Theoretical investigation on the geminal proton-carnon-13 Coupling constants
It has been concluded from the present study that the geminal proton coupling of carboxyl (carbonyl) carbon-13 has an angular dependence of the form: A+Bcos?2?A + B \cos^2 \thetaA+Bcos2? based on the relative orientation ... -
Study of the source-substrate geometry to achieve thickness uniformity of thin films
Despite the various technical skills that are available, the thickness uniformity cannot be made better than ±1% on a large number of substrates. In addition to the theoretical limitations, one has practical difficulties ... -
Synthesis and liquid crystalline properties of Rufigallol based discotic materials
In 1977 Chandrashekar et al. discovered the discotic liquid crystalline phase. A typical discotic molecule has an aromatic core to which are attached via ester or ether links six to eight alkyl chains, for example benzene ... -
Modeling, Characterization, and Control of Switched Reluctance Motors
Switched reluctance machine (SRM) is known for many advantages such as permanent magnet-free operation, robust structure, low rotor inertia, low manufacturing cost, and excellent fault-tolerant capability. Hence, SRM has ... -
Cross-Layer Rate Adaptation in IEEE 802.11ax WLANs using Hybrid Feedback and Bayesian Learning Mechanisms
The rapid growth in wireless data demand has led to the evolution of IEEE 802.11 standards, with 802.11ax (Wi-Fi 6) aiming to improve spectral efficiency, throughput, and user experience in dense environments. A key ...