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Skip to Search Results- 8Graduate and Postdoctoral Studies (GPS), Faculty of
- 8Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 7Physics, Department of
- 7Physics, Department of/Journal Articles (Physics)
- 3Geotechnical and Geoenvironmental Engineering Program
- 3Geotechnical and Geoenvironmental Engineering Program/Journal Articles (Geotechnical & Geoenvironmental Engineering)
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Shear Alfvén waves on stretched magnetic field lines near midnight in Earth's magnetosphere
Download2000
Tikhonchuk, Vladimir T., Rankin, Robert, Fenrich, Frances
The spectrum of toroidal standing shear Alfvén waves (SAWs) is derived for a stretched magnetic field line geometry that is approximated by the Tsyganenko 96 magnetic field model. The model is applied to field lines near the midnight meridional plane. It is demonstrated that the fundamental mode...
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1999
Tikhonchuk, V. T., Voronkov, I., Samson, J. C., Rankin, Robert
The three-dimensional, nonlinear evolution of a shear how (or Kelvin-Helmholtz (KH)) instability driven by a large-amplitude shear Alfven wave (SAW) in the Earth's magnetosphere is studied by using numerical solutions to the complete set of ideal magnetohydrodynamic equations. An initial setup is...
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Fall 2010
Computational simulations of a perturbed vortex ring are performed to recreate and understand the instability seen in impacting water droplet experiments. Three initial conditions are tried to respectively trigger a Widnall instability, a Rayleigh centrifugal instability, and a vortex breakdown...
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2003
Christiansson, R., Martin, C. D., Kaiser, P. K.
Abstract: When the stress-induced risks to a projects warrant it, in situ stress must be measured. However, as the stress-induced risks increase, i.e.. the stress magnitudes approach the rock mass strength, the confidence in commonly used stress measurement techniques decrease. The design of...
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1993
Frycz, P., Samson, J. C., Rankin, Robert, Harrold, B. G.
Magnetohydrodynamic, field line resonances in the Earth's magnetosphere can have very large velocity shears and field-aligned currents. Auroral radar measurements of high-latitude resonances indicate that the velocities associated with the resonances in the E and F regions am often substantially...
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THEMIS observations of the spatial extent and pressure‐pulse excitation of field line resonances
Download2010
Kabin, Konstantin, Liu, Wenlong, Rankin, Robert, Angelopoulos, Vassilis, Glassmeier, Karl-Heinz, Li, X., Sarris, T. E., Bonnell, John, Talaat, Elsayed R.
We present a case study of Field Line Resonances (FLRs) in the dayside magnetosphere, observed in both electric and magnetic field components at multiple L-shells near the equator. The event measured by the five THEMIS probes and the nearby GOES and Geotail satellites provides a unique...
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Spring 2010
The focus of this thesis is on electro-osmotically pumped flow of viscoelastic fluids through microchannels. Fluid transport in microscaled structures is typically laminar due to the low Reynolds numbers involved. However, it is known that viscoelastic polymeric liquids can display striking...
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2002
Chan, D. H., Morgenstern, N. R., Robertson, P. K., Imam, S. M. R.
Abstract: The relationship between the shapes of the yield surface and the undrained effective stress path (UESP) of loose sand is investigated for triaxial loading conditions. It is shown that the UESP can be used in the construction of capped yield surfaces for sands. The stress ratio M-p...