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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Modelling the effect of vegetation on the seasonal snow cover

Tribbeck, Melody Jane January 2002 (has links)
No description available.

Monte Carlo simulation of radiation heat transfer in a three-dimensional enclosure containing a circular cylinder

Hong, Seung-Ho 14 April 1994 (has links)
Graduation date: 1994

Modeling the Oregon State University TRIGA reactor using the Attila three-dimensional deterministic transport code /

Keller, S. Todd. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 85-88). Also available on the World Wide Web.

On the transmission of ultraviolet radiation in horizontally inhomogeneous atmospheres : a three dimensional approach based on the Delta-Eddington's approximation /

Qu, Zheng. January 1999 (has links)
Thesis (Ph. D.)--University of Chicago, Dept. of the Geophysical Sciences, March 1999. / Includes bibliographical references. Also available on the Internet.

Hydrodynamic simulations with a radiative surface

Barekat, Atefeh January 2013 (has links)
We solve the equations of radiation hydrodynamics to compute the time evolution toward one-dimensional equilibrium solutions using ageneralized Kramers opacity, κ=κ0 ρa Tb, with adjustable prefactor κ0 and exponents a and b on density ρ and temperature T, respectively. We choose our initial conditions to be isothermal and find that the early time evolution away from the isothermal state is fastest near the height where the optical depth is unity, and is slower both above and below it. In all cases where the quantity n=(3-b)/(1+a) is larger than -1, we find a nearly polytropic solution with ρ<img src="http://www.diva-portal.org/cgi-bin/mimetex.cgi?%5Cpropto" />Tn in the lower part and a nearly isothermal solution in the upper part with a radiating surface in between, where the optical depth is unity. In the lower part, the radiative diffusivity is found to be approximately constant, while in the upper optically thin part it increases linearly. Interestingly, solutions with different parameter combinations a and b that result in the same value of n are rather similar, but not identical. Increasing the prefactor increases the temperature contrast and lowers the value of the effective temperature. We find that the Péclet number based on sound speed and pressure scale height exceeds numerically manageable values of around 104 when the prefactor κ0 is chosen to be approximately six orders of magnitude below the physically correct value. In the special case where a=-1 and b=3, the value of n is undetermined and the radiative diffusivity is strictly constant everywhere. In that case we find a stratification that is approximately adiabatic. Finally, exploratory two-dimensional calculations are presented where we include turbulent values of viscosity and diffusivity and find that onset of convection occurs when these values are around 3<img src="http://www.diva-portal.org/cgi-bin/mimetex.cgi?%5Ctimes" />1013 cm2 s-1. The addition of an imposed horizontal magnetic field suppresses small-scale convection, but has not led to instability in the cases investigated so far.

Wave effects and statistical optics in radiative transfer /

Sun, Yupin. January 2001 (has links)
Thesis (Ph. D.)--University of Chicago, Dept. of Physics, June 2001. / Includes bibliographical references. Also available on the Internet.

Model studies of solar spectral irradiance at the bottom and top of a cloudy atmosphere

Paris, Mark V. 12 1900 (has links)
No description available.

Theoretical and numerical studies of electromagnetic wave scattering from random media with random rough surfaces and discrete particles /

Lam, Chi Ming, January 1992 (has links)
Thesis (Ph. D.)--University of Washington, 1992. / Vita. Includes bibliographical references (leaves [71]-77).

Solution of time-independent inverse problems for linear transport theory /

Yi, Hak-Chae J. January 1990 (has links)
Thesis (Ph. D.)--University of Washington, 1990. / Vita. Includes bibliographical references (leaves [144]-149).

Radiative transfer in extended and expanding atmospheres :

Haisch, Bernhard Michael, January 1975 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1975. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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