Division of Mechanical Sciences: Recent submissions
Now showing items 121-140 of 2142
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Holographic interferometric study of natural convective heat transfer in vertical rectangular enclosures
Natural convective flows, induced by buoyancy forces on the fluid, in rectangular enclosures are important in many engineering applications such as thermal insulation of buildings, double-glazed windows and in flat plate ... -
Numerical studies of some non-linear problems in fluid mechanics
The problem of flow around a circular cylinder has long attracted the attention of many research workers because of its many practical applications and exciting mathematical features. This thesis contains the results of ... -
Two dimensional modelling of annular two phase flow
A two-dimensional model for analyzing annular two-phase flow through tubular geometry, based on the solution of continuity, momentum, and energy equations, is presented. The numerical approach employed is an adaptation of ... -
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 ... -
Casing boundary layer decelopment in axial impellers with TIP clearence
Casing wall boundary layers are heavily skewed under the action of secondary and tip clearance flows, relative wall motion and the transverse forces associated with the blade rows. The growth of the casing boundary layers ... -
Studies on film boiling
A boundary layer analysis is made for the two-phase flow problem in laminar film boiling under various situations. The situations considered are: Film boiling on horizontal cylinders and spheres Forced convection film ... -
Stochhastic chatter theory
The machining process on modern machine tools is a dynamic phenomenon having cause-and-effect interaction under stochastic environments. With a steady increase in utilization parameters, intensive vibrations occur, which ... -
Some aspects of synthesis, structure and stability of quasicrystals.
The celebrated discovery of quasicrystals has broadened our outlook towards the various possibilities of atomic arrangements in the solid state. Many fascinating problems in the field of quasicrystals have emerged, which ... -
Kinetic investigations on gas solid reactions
Gas-Solid Reactions in Metallurgical Processes Gas-solid reactions are of current interest to process metallurgists because of their growing importance in industrial processes. In the present work, investigations were ... -
Energy dissipation and other studies on submerged circular twin jets
When a high velocity sutmerged water jet enters a quiescent amhient medium of the same fluid Its energy gets gradually dissipated along Its course In the surrounding medium and Its efflux velocity gets decelarated along ... -
Some aspects of cavitation phenomena in centrifugal pumps
The work reported in this thesis has a fourfold objective, namely, to study: The influence of Froude number on the inception of cavitation in radial flow pumps. The influence of prerotation on the cavitation performance ...