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Full-Text Articles in Physical Sciences and Mathematics
Numerical Experiments With The Quasigeostrophic Potential-Vorticity Equation, Peter L. Spence
Numerical Experiments With The Quasigeostrophic Potential-Vorticity Equation, Peter L. Spence
OES Theses and Dissertations
A method is developed to model the circulation of a barotropic, 8-plane ocean under an imposed steady wind stress. The model includes the effect of both horizontal and vertical friction along with nonlinear advection of vorticity. Implementing the method involves solving the unsteady quasigeostrophic potential-vorticity equation using a compact finite difference scheme (Gatski, Grosch, and Rose, 1982).
Once developed, this model is used in four separate numerical experiments. In each experiment, a model ocean with an initial flow field is driven to a steady state solution. Vertical viscosity is held constant in the first three experiments while lateral viscosity is …
A Theoretical Model For Calculation Of Molecular Stopping Power, Yuan-Jian Xu
A Theoretical Model For Calculation Of Molecular Stopping Power, Yuan-Jian Xu
Physics Theses & Dissertations
A modified local plasma model based on the work of Linhard-Winther, Bethe, Brown, and Walske is established. The Gordon-Kim's molecular charged density model is employed to obtain a formula to evaluate the stopping power of many useful molecular systems. The stopping power of H2 and He gas was calculated for incident proton energy ranging from 100 KeV to 2.5 MeV. The stopping power of O2, N2 and water vapor was also calculated for incident proton energy ranging from 40 keV to 2.5 MeV. Good agreement with experimental data was obtained.
A discussion of molecular effects leading …