Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Turbulent motion"”.
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Dynamic behavior of unsteady turbulent motion in pipe flows of dense gas-solid suspensions
Unsteady stratified motions in dense gas-solid suspension in horizontal pipe flows at low velocities have been observed, but the means for predicting these motions are lacking. For a dense suspension, the effects of particle-particle interaction, the damping of fluid motion by particles and the …
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The bending effect in turbulent flame propagation
… the sensitivity of flame propagation to the turbulent motion of burning gases is investigated. The long-standing issue of the 'bending effect' is focused upon, which refers to the experimentally-observed inhibition of flame propagation velocity at high intensities of turbulence. Plausible …
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Turbulent fluid flow and heat transfer in annular passages with rough surfaces and moving cores.
… effects of surface roughness, core velocity and turbulent motion on the momentum and heat transfer characteristics of the flow, such as friction forces, velocity profiles, temperature profiles and heat transfer. The analytical predictions are produced by a mathematical model based on an …
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Combustion optimization in a hydrogen-enhanced lean burn SI engine
… on three key areas: the ignition system, charge motion in the inlet ports, and mixture preparation. The ignition system tests compared a standard inductive coil scheme against high-energy discharge systems. Charge motion experiments focused on the impact of turbulence patterns generated by …
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The Galaxy Velocity Function from MIGHTEE-HI Early Science Data
… for instrumental broadening, Doppler broadening, turbulent motion and inclination effects.
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Velocity and temperature fields in oscillating boundary layers
… (eddy viscosity type) are tested for oscillating turbulent boundary layer flow on a flat plate. Satisfactory results are obtained by decoupling the mean and oscillatory Reynolds stresses. It appears that theoretical profiles of oscillating velocity in low or high frequency regions are relatively …
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Turbulence and Transport in Stars and Planets
… thermal equilibrium, dynamical equilibrium and turbulent anisotropy all hide interesting phenomena which make a true difference to the structure and evolution of these bodies. To begin I developed new theoretical tools for probing these phenomena, starting with a new model of turbulent motion …
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Adjoint-based control of turbulent jet noise
… is conducted with the smallest scales of turbulent motion approximated using the dynamic Smagorinsky sub-grid-scale model. For the time horizon over which the control is applied, the most intense noise events are almost completely removed. At a jet exhaust angle of 30 degree, the far-field …
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Small-scale fluctuations in D-region ionization due to hydrodynamic turbulence
… of the plasma, the statistical theory of turbulent advection, the relaxation to photochemical equilibrium, and the theoretical prediction of observed scattered power from electron-concentration fluctuations. The electron-neutral and ion-neutral collision frequencies for usc in the …