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Showing 1 to 12 of 12 for “"Homogeneous isotropic turbulence"”.
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Toward a Theory of Homogeneous, Isotropic Turbulence of Incompressible Fluids
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-02-27T21:15:16Z No. of bitstreams: 1 1971_nakano.pdf: 4067448 bytes, checksum: d794ce2ec32b3ac96c8660b08b8e878a (MD5)
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Parallel multigrid for large-scale least squares sensitivity
… the estimation of climate sensitivities for a homogeneous isotropic turbulence model, the largest scale LSS computation performed to date.
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Reduced-Order Models for the Prediction of Unsteady Heat Release in Acoustically Forced Combustion
… to a hypothetical burner stabilized flame with homogeneous, isotropic turbulence. Exact solution with a simplified turbulent reaction model parallels that of the plug flow reactor closely, demonstrating a relation between static quantities and the flame frequency response. Comparison with …
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Particles and Bubbles Collisions Frequency in Homogeneous Turbulence and Applications to Minerals Flotation Machines
… particles (solid particles and bubbles) in homogeneous isotropic turbulence. Both direct numerical simulations (DNS) and Large Eddy simulations (LES) are conducted to determine velocity fluctuations of the carrier phase. The DNS results are used to validate existing theoretical models as …
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Spectral modeling of an idealized atmospheric surface layer
… between two previously unrelated areas of the turbulence literature: 1) Kolmogorov's scaling of the turbulent energy spectrum, derived for homogeneous, isotropic turbulence and 2) the 'law of the wall' in wall-bounded turbulence. The cospectral budget model is then extended to the case where …
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Kinematic simulation of turbulent flow and particle motions
… a new method for simulating high Reynolds number turbulence which requires much less computing power. This involved both theoretical work - to understand and model the important processes - and computational work, to implement the model efficiently. There are 'many different techniques for …
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Large Eddy Simulation and Wavelet Analysis of the Flow Field around a Surface Mounted Prism
… large-scale vortices with the multiplicity of turbulence scales in the incoming wind exacerbates their unsteady motion and hence significantly affects the pressure fluctuations spectra experienced by the building. Large-eddy simulations are conducted to study the interaction of homogeneous …
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Physical Insights of Non-Premixed MILD Combustion using DNS
… Numerical Simulation (DNS) is used to study turbulence, premixed flames and MILD combustion to obtain these additional physical insights. In a first stage, the scale-locality of the energy cascade is analysed by applying a multiscale analysis methodology, called the bandpass filter method, on …
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Large Eddy Simulation of Shear-Free Interaction of Homogeneous Turbulence with a Flat-Plate Cascade
Studying the effects of free stream turbulence on noise, vibration, and heat transfer on structures is very important in engineering applications. The problem of the interaction of large scale turbulence with a flat-plate cascade is a model of important problems in propulsion systems. Addressing …
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Experimental setups for studying homogeneous-isotropic and rotating turbulence in clay suspensions: Preliminary results
Homogeneous and isotropic turbulence (HIT) has been at the center of a vast span of research seeking fundamental understanding and insights on the phenomenon of turbulence, which is ubiquitous in nature as well as engineering. The HIT assumption greatly simplifies the analytical treatment of …
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Lagrangian dynamics of turbulence: Applications with 3D particle tracking velocimetry
Lagrangian dynamics of turbulence allow for a distinct characterization of the motion of particles. It is particularly useful in the understanding of dispersion, mixing, and transport phenomena. Due to the complexity and difficulty in quantifying Lagrangian properties, experimental studies on …
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The Statistical Theory of Stationary Turbulence
This thesis concerns the theory of turbulence as well as that of wavelet transforms. The main contribution to the theory of turbulence is an extension of the von Karman-Howarth equation to turbulence that may be either two- or three-dimensional, and for which external forcing maintains the state of …