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Computed and experimental interactions between eddy structure and dispersed particles in developing free shear layers
We are investigating the interactive process between turbulent flow and dispersed phase particles. We are focusing on the mechanisms that appear to result in a reduction of local turbulent intensity and a corresponding reduction in wall heat transfer and subsequent wall erosion in turbulent solid propellant combustion flow. We apply computational simulations and physical experiments specialized to a developing free shear layer over a rearward facing step and over a parallel splitter plate. The flow configuration evolves in a two-dimensional, steady, combustion and non-combustion turbulent free shear mixing region, with and without particle additives. The computational simulations combine three basic components: gas phase Navier-Stokes solutions, Lagrange particle field solutions and a Monte Carlo technique for the random encounters, forces and accelerations between the two fields. We concentrate here on relatively large sized additive particles (of the order of tens of microns to 100 microns mean diameter). We examine their apparent influence in breaking up the larger, energy bearing eddy structures into smaller structures which are more readily dissipated.
Date:
May 20, 1982
Creator:
Buckingham, A. C.; Siekhaus, W. J.; Keller, J. O.; Ellzey, J.; Hubbard, G. & Daily, J. W.
Object Type:
Article
System:
The UNT Digital Library
Leaching study of PNL 76-68 glass beads using the LLNL continuous-flow method and the PNL-modified IAEA method. Final report
Lawrence Livermore National Laboratory (LLNL) has conducted a long-term single-pass continuous-flow (SPCF) leaching test of the glass waste form PNL 76-68. Leaching rates of Np, Pu, and various stable elements were measured at 25/sup 0/ and 75/sup 0/C with three different solutions and three different flow rates. The purposes of the study were: (1) to compare SPCF leaching results with the results of a modified IAEA leach test performed by Pacific Northwest Laboratories (PNL); (2) to establish elemental leach rates and their variation with temperature, flow rate and solution composition; and (3) to gain insight into the leaching mechanisms. The LLNL and PNL leach tests yielded results which appear to agree within experimental uncertainties. The magnitude of the leach rates determined for Np and the glass matrix elements is 10/sup -5/ grams of glass/cm/sup 2/ geometric solid surface area/day. The rates increase with temperature and with solution flow rate, and are similar in brine and distilled water but higher in a bicarbonate solution. Other cations exhibit somewhat different behavior, and Pu in particular yields a much lower apparent leach rate, probably because of sorption or precipitation effects after release from the glass matrix. After the initial few days, most elements …
Date:
August 20, 1982
Creator:
Buddemeier, R. W.; Coles, D. G.; Mensing, R. W.; Rego, J. & Weed, H. C.
Object Type:
Report
System:
The UNT Digital Library
Fusion breeder
The fusion breeder is a fusion reactor designed with special blankets to maximize the transmutation by 14 MeV neutrons of uranium-238 to plutonium or thorium to uranium-233 for use as a fuel for fission reactors. Breeding fissile fuels has not been a goal of the US fusion energy program. This paper suggests it is time for a policy change to make the fusion breeder a goal of the US fusion program and the US nuclear energy program. The purpose of this paper is to suggest this policy change be made and tell why it should be made, and to outline specific research and development goals so that the fusion breeder will be developed in time to meet fissile fuel needs.
Date:
April 20, 1982
Creator:
Moir, Ralph W.
Object Type:
Article
System:
The UNT Digital Library
Review of single transient oscillographic recorders with gigahertz bandwidth
In laser driven inertial confinement fusion research, at Livermore, we are diagnosing many phenomena that occur in a time frame that exceeds the capabilities of even the most advanced, present day oscillographic recording instruments. Many of the by-products of the interaction between the laser beam and fuel pellet are monitored to determine the specifics of the fusion process. By the use of appropriate detectors, we convert the information contained in the radiated by-products to electrical signals which are recorded on high bandwidth oscillographic recorders. Our present range of recording capabilities for one x-ray diagnostic measurement in use at Livermore is shown. A commonly used configuration consists of an XRD-31 x-ray detector connected to a direct access Tektronix R7912 transient digitizer using 1/2 in. diameter air dielectric coaxial cable. This configuration gives a system fwhm of approximately 335 ps. Our premier configuration, on the other hand, consists of an improved response detector and a French Thomson-CSF TSN-660 oscilloscope with a shorter length of coaxial cable (typically 20 feet). The system fwhm in this case is less than 120 ps which is our fastest oscillographic recording system at the present time.
Date:
October 20, 1982
Creator:
Campbell, D.E.
Object Type:
Article
System:
The UNT Digital Library
Site 300 hazardous-waste-assessment project. Interim report: December 1981. Preliminary site reconnaissance and project work plan
This document was prepared to outline the scope and objectives of the Hazardous Waste Assessment Project (HWAP) at Site 300. This project was initiated in October, 1981, to investigate the existing solid waste landfills in an effort to satisfy regulatory guidelines and assess the potential for ground-water contamination. This involves a site-specific investigation (utilizing geology, hydrology, geophysics and geochemistry) with the goal of developing an effective ground-water quality monitoring network. Initial site reconnaissance work has begun and we report the results, to date, of our geologic hydrogeologic studies. All known solid waste disposal locations are underlain by rocks of either the Late Miocene Neroly Formation or the Cierbo Formation, both of which are dominantly sandstones interbedded with shale and claystone. The existence of a regional confined (artesian) aquifer, as well as a regional water-table aquifer is postulated for Site 300. Preliminary analysis has led to an understanding of directions and depths of regional ground-water flow.
Date:
January 20, 1982
Creator:
Raber, E.; Helm, D.; Carpenter, D.; Peifer, D. & Sweeney, J.
Object Type:
Report
System:
The UNT Digital Library
Comparison of the initial ETA gas propagation experiments with theoretical models
This report contains a description of the initial ETA propagation experiments in air at a beam current of 4.5 kA. The beam was observed to propagate at the pressures anticipated on the basis of previous theory and experiment. A comparison of measured net current waveforms with predictions of the PHOENIX code showed good agreement over the pressure range 0.1 to 200 torr. However, the beam was observed to expand with Z at a faster rate than theory predicts. Excessive transverse beam modulation at injection complicated the experiments and limited their comparison with theory.
Date:
April 20, 1982
Creator:
Chambers, F. W.; Clark, J. C. & Fessenden, T. J.
Object Type:
Report
System:
The UNT Digital Library
Liquid-Phase Methanol Process Development Unit: Installation, Operation, and Support Studies. Technical Progress Report No. 1, 28 September 1981-31 December 1981
During this period the Work Breakdown Structure Dictionary was established. Task 1 was completed with submittal of the Project Work Plan and the Quality Assurance Manual. CSI produced basic process design information and a preliminary flowsheet for the LaPorte LPMeOH PDU. APCI developed the flowsheet further and set up the process on APCI's process simulator. The flowsheet development revealed a number of major changes necessary in the existing LPM pilot plant; this has led to pursuit of a unified design concept. Approval was requested for the unified design concept as well as advanced schedule for relocation of the LPM unit and advanced procurement of long delivery equipment items. A number of preliminary heat and material balances were calculated for the LPMeOH PDU and preliminary process specifications were prepared for the equipment items. The final design basis was established. The design pressure was set at 1000 psig. Eight design operating cases were defined for the following range of reactor operating conditions: Pressure - 500 to 900 psig, Temperature - 220 to 270/sup 0/C, Liquid-Fluidized Space Velocity - 1000 to 4000 l/hr-kg catalyst, Liquid-Entrained Space Velocity - 2000 to 10,000 l/hr-kg catalyst, and Liquid-Entrained Catalyst Loading - 0.1 to 0.4 kg catalyst/l …
Date:
January 20, 1982
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0074.0711]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "From left, Moore High School girls Susan Young, Joanna Freeman and Mendy Cole leave the floor in ecstasy after Young's last-second shot produced a 41-40 victory over Muskogee in the Class 5A state high school championship game Saturday in Tulsa."
Date:
March 20, 1982
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0111.0542]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
April 20, 1982
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0075.0709]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Rhonda Hurst puts up two of her 41 points in Del Crest's 53-31 win over Carl Albert in junior high basketball action."
Date:
December 20, 1982
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0071.0210]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Guthrie third baseman Randy Hewell seems to be picking the pocket of Mustang's Larry Bryant in a rundown."
Date:
May 20, 1982
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0538]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Witness Vickita of Wewoka explains what she knows about the case."
Date:
April 20, 1982
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0101]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Kelli Collins / Star Elementary School Explosion 1-19-82."
Date:
January 20, 1982
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0330]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Teresa Cole displays a few of the items that will be on sale at the Bluff Creek Neighborhood Association's annual arts and crafts fair."
Date:
May 20, 1982
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0171.0041]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 20, 1982
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0162.0613]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Assistant principal Gene Dipboye gets a thank you and a plaque from Parent Teacher Association .."
Date:
April 20, 1982
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0149.0119]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "In 1961, ARMED with his first drivers license Darrell Crosby cruised the teen hang-outs near Classen High School in an autumn gold, 1955 Chevy convertible, but dreamed of someday owning a Chevrolet Corvette sports car."
Date:
May 20, 1982
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0164.0324]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Champion Frisbee form, canine style, is exhibited by Superdog."
Date:
August 20, 1982
Creator:
Rife, Jerry
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0152]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma City park ranger Sgt. Gerald Cowan tells two motorcyclists where they may ride at Lake Hefner."
Date:
March 20, 1982
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0171.0153]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Ron W. Earley has joined Ancel Earp, McEldowney & McWilliams Inc. as vice president and chief administrative officer."
Date:
October 20, 1982
Creator:
Wilson, George R.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0414]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Leroy Combs . . . Impresses scouts."
Date:
November 20, 1982
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0107]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Marcea Collins, 5, left, and Faith Pierson, 9, struggle with original clay creations which will be turned into pottery, they hope."
Date:
October 20, 1982
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0591]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "helping themselves to the homemade hors d'oeuvres at Tuesday's Angels and Friends of the Festival of the Arts party are Henry and Janyce Coffeen."
Date:
April 20, 1982
Creator:
Wilson, George R.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0494]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mark Clayton, who couldn't contain his enthusiasm, carries his son Corey of the field after the young soccer player scored a goal for the Lasers at Edmond."
Date:
March 20, 1982
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History