COLOR HOLOGRAMS FOR WHITE LIGHT RECONSTRUCTION

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70027/2/APPLAB-8-11-286-1.pd

Classical generalized constant coupling model for geometrically frustrated antiferromagnets

A generalized constant coupling approximation for classical geometrically frustrated antiferromagnets is presented. Starting from a frustrated unit we introduce the interactions with the surrounding units in terms of an internal effective field which is fixed by a self consistency condition. Results for the magnetic susceptibility and specific heat are compared with Monte Carlo data for the classical Heisenberg model for the pyrochlore and kagome lattices. The predictions for the susceptibility are found to be essentially exact, and the corresponding predictions for the specific heat are found to be in very good agreement with the Monte Carlo results.Comment: 4 pages, 3 figures, 2 columns. Discussion about the zero T value of the pyrochlore specific heat correcte

Cinemagraphic PIV investigation of the lifted turbulent jet diffusion flame stabilization region

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76915/1/AIAA-2001-698-809.pd

Laboratory Notebooks, 1968-1982

Digitized version of Juris Upatniek's laboratory notebook from July 3, 1968 to December 2, 1982. Records variables, procedures, and results of experiments related to hologram construction, photography, microscopy, and optics among related topics. Includes Upnatnieks's analyses of results, equations, hand drawings of optical set ups and photographic examples of holograms.http://deepblue.lib.umich.edu/bitstream/2027.42/102034/1/Notebook 1968.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102034/2/Notebook 1968.zi

Laboratory Notebooks, 1963-1965

Digitized version of Juris Upatniek's laboratory notebook from January 16, 1963 to November 17, 1965. Records variables, procedures, and results of experiments related to hologram construction, photography, microscopy, and optics among related topics. Includes Upnatnieks's analyses of results, equations, hand drawings of optical set ups and photographic examples of holograms.http://deepblue.lib.umich.edu/bitstream/2027.42/102032/1/Notebook 1963.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102032/2/Notebook 1963.zi

Cinema particle image velocimetry investigation of turbulent jet flame stabilization.

A new cinema PIV system was developed and used to study the physical phenomena of non-premixed turbulent jet flame stabilization. The system offers an unprecedented combination of image acquisition rate (8000/s), sequence length (4000) and resolution (equivalent to 1K x 1.5K pixels) that provides finely resolved yet extraordinarily lengthy time histories of the evolution of velocity fields in laboratory-scale gas-phase turbulent flows. These measurements provide quantitative information concerning the dynamics of turbulence and combustion that is not available from conventional experimental techniques or computational simulations. For example, time histories of the interaction between turbulent vortex structures and the flame thermal boundary are observed. Gas and flame velocities are obtained simultaneously, yielding direct measurements of flame propagation velocities. The gas and flame velocities are highly correlated, suggesting strong interaction between the velocity field and the flame. The gas and propagation velocities at the flame base remain close to premixed laminar burning velocities (SL), which are three to four times smaller than the velocities in corresponding non-reacting cases. Strong reverse flow is observed upstream of the flame base, suggesting that the velocity reduction is caused by heat release-induced dilatation. These observations suggest that the dilatation velocity field plays a dominant role in stabilization by reducing incident gas velocities to levels at which laminar premixed, triple, or edge flames can be sustained.Ph.D.Aerospace engineeringApplied SciencesPlasma physicsPure SciencesUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/123080/2/3058068.pd