etd AT Indian Institute of Science: Recent submissions
Now showing items 21-40 of 7574
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Contributions to the chemistry of disulfur monoxide
Disulfur monoxide is an unstable gaseous species. Even at comparatively lower temperatures, it undergoes decomposition into sulfur dioxide and elemental sulfur. When dissolved in chilled carbon tetrachloride, the solution ... -
Dilute solution on properties of Methyl Methacrylate-Acrylonitrile random Copolymers
The large values of a, the M.H. exponent, suggest that these molecules are highly extended in the solvents studied. Application of S.F. and other existing theories like I.P. to calculate the unperturbed dimensions lead to ... -
Studies on flow past pipe disturbances with Hagen Poiseuille approach flow
The problem of flow past disturbances in circular pipes has wide engineering applications. Most available information pertains to turbulent approach flow. In this thesis, the effects of disturbances in circular pipes are ... -
Chracteristics of self-aerated flows
A characteristic of high-velocity open channel flows is the phenomenon of self-aeration, in which atmospheric air is entrained into and mixed with the flow, creating the appearance of white water. This phenomenon is ... -
Division of flow in open channels
This thesis deals with the problem of division of flow when a branch channel bifurcates from a main channel. The effects of both the angle of off-take and the relative widths of the main and branch channels are considered. In ... -
Inception of cavitation
Cavitation due to flow separation may occur at pressures higher than the vapor pressure (e.g., where PwP_wPw? is the measured pressure in the cavity and PvP_vPv? is the vapor pressure at the corresponding temperature). The ... -
Separation control in diverging channels
The work presented herein consists of the separation control methods to minimize losses and recover as much velocity head as possible after the divergence in a straight-walled diverging channel in the subcritical flow ... -
Flow characteristics of rectangular and trapezoidal finite crest... ..weirs
This thesis presents an extensive and systematic study of the free and submerged flow characteristics of rectangular and trapezoidal finite crest width weirs and triangular profile weirs. Aspects studied include the ... -
Studies on characteristics of cavity and cavitation damage behind circular cylinders in water with a venturi
Cavitation is a complex hydrodynamic phenomenon involving the appearance, growth and collapse of vapour- and/or gas-filled bubbles. During the collapse phase, it generates forces sufficient to erode even the strongest ... -
Finite difference modelling of ground water flows
The thesis presents several studies on finite difference modelling of groundwater flow systems. The studies include: (i) Development of an efficient computational algorithm for nonrectangular flow domains; (ii) Comparative ... -
Characteristics, correlations similarities and prediction of erosion due to cavitation and liquid impingment, Ph.D. Thesis
Erosion due to cavitation and liquid impingement is a common type of wear that occurs in a variety of engineering equipment, structures, and devices, such as: Hydro turbines Pumps Steam turbine blades Diesel engine cylinder ... -
Effect of particles on nonequilibrium relaxation phenomena in high temperature gas-nozzle flows
This thesis presents an exhaustive study of the effects of solid particles on the relaxation phenomena of various nonequilibrium processes, such as vibrational, dissociation and ionization, of the gas phase at high temperature ... -
Dynamics in complex systems: liquid crystals, biological water, supercooled water and enzymes
The origin of the glassy orientational dynamics, both single particle and collective, of nematogens near the isotropic-nematic transition has been addressed in several publications in recent years [5-7, 12]. In these ... -
Electron spectroscopic studies of the adsorption and reactivity of oxygen on transition metal surfaces covered with alkali and alkaline earth metals
Characteristic Cl(2p) and O(1s) peaks are seen by XPS attributable to distinct adsorbed chlorine and oxygen species on potassium and barium dosed Ag surfaces: a) There is selective stabilization of molecular dioxygen species ... -
Investgations of molecular interaction by photoelectron and electron energy loss spectrospies
Electronic structures of a variety of electron donor-acceptor complexes have been studied by employing ultraviolet (HeI) photoelectron spectroscopy. The systems studied are the complexes of BH? / AlCl?, GaCl? and SO? with ...