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Numerical solution of the Navier--Stokes equations at high Reynolds numbers
A numerical method is presented which is designed to solve the Navier- Stokes equations for two-dimensional, incompressible flow. The method is intended for use on problems with high Reynolds numbers for which calculations via finite difference methods have been unattainable or unreliable. The proposed scheme is a hybrid utilizing a time-splitting finite difference method in areas away from the boundaries. In areas neighboring the boundaries, the equations of motion are solved by the newly proposed vortex method by Chorin. The major accomplishment of the new scheme is that it contains a simple way for merging the two methods at the interface of the two subdomains. The proposed algorithm is designed for use on the time-dependent equations but can be used on steady state problems as well. The method is tested on the popular, time-independent, square cavity problem, an example of a separated flow with closed streamlines. Numerical results are presented for a Reynolds number of 10$sup 3$. (auth)
Date:
January 1, 1974
Creator:
Shestakov, A.I.
System:
The UNT Digital Library
Study of $Sigma$(1670) resonance production K$sup -$p interactions
None
Date:
September 1, 1974
Creator:
Estes, R. D.; Fancher, D. L. & Schaffer, A. C.
System:
The UNT Digital Library
Electron microprobe study of the composition of tarnish films on copper-- zinc, copper--aluminum, and copper--nickel alloys
None
Date:
January 1, 1974
Creator:
Gabel, H
System:
The UNT Digital Library
Anomalous epsilon/$beta$$sup +$ decay branching ratios
None
Date:
January 1, 1974
Creator:
Firestone, R.B.
System:
The UNT Digital Library
Gamma--gamma directional correlation studies in $sup 77$Ge decay
None
Date:
November 20, 1974
Creator:
Lent, E.M.
System:
The UNT Digital Library
Investigation of preferential etch patterns created in human dental enamel during acid attack
None
Date:
October 1, 1974
Creator:
Petty, D S
System:
The UNT Digital Library
An experimental study of the reaction p + d $Yields$ $sup 3$He + $pi$$sup 0$ in the $delta$(1236) resonance region
None
Date:
August 1, 1974
Creator:
Fredrickson, D.H.
System:
The UNT Digital Library
Calorimetric studies of singlet-ground-state systems
None
Date:
September 1, 1974
Creator:
Wun, M.
System:
The UNT Digital Library
Histogenesis of fetal rat lung and liver after x-irradiation in organ culture and in utero
None
Date:
June 1, 1974
Creator:
Vogt, J C
System:
The UNT Digital Library
Low temperature absorption spectra and energy levels of HoF$sub 3$ in the regions 21625 cm$sup -1$ to 21360 cm$sup -1$ and 26160 cm$sup -1$ to 25900 cm$sup -1$
Thesis. The optical absorption spectra of Ho/sup 3+/ in the rare earth salt HoF/sub 3/ is studied. Such optical region studies (visible radiation) are easily performed with standard light sources and optical arrangements. Since the energy range of visible light coincides with the excitation energy range for a number of electronic transitions within the rare earth salts, the studies theoretically provide considerable information about rare earth electronic energy levels. Data are compiled for the effects of an applied magnetic field upon the spectra and the effect of sample temperature on the observed absorption spectra. 61 references. (MCW)
Date:
April 1, 1974
Creator:
Blinde, D.R.
System:
The UNT Digital Library
Guiding-center simulation of toroidal plasmas
None
Date:
December 18, 1974
Creator:
Johnson, T.H.
System:
The UNT Digital Library
Numerical studies of resistive instabilities in diffuse pinches
None
Date:
May 1, 1974
Creator:
Dibiase, J.A.
System:
The UNT Digital Library
$alpha$-transfer studies via the ($alpha$,$sup 8$Be) reaction at high energies
None
Date:
August 1, 1974
Creator:
Wozniak, G.J.
System:
The UNT Digital Library
Parity non-conserving nuclear force
None
Date:
March 1, 1974
Creator:
Chou, T.S.
System:
The UNT Digital Library
Study of some metal cluster systems containing niobium, tantalum, molybdenum, and tungsten
None
Date:
July 1, 1974
Creator:
Dorman, W.C.
System:
The UNT Digital Library
Development of the OSO-6 high-energy neutron detector and correlation of measured solar neutron fluxes to solar flares
Thesis. The development of a directional high energy (20 to 160 MeV) neutron detector which was flown to satellite altitudes (500 km; circular equatorial orbit) in the NASA Orbiting Solar Observatory (OSO-6) in August 1969 is described. Both the angle of incidence and the energy of the neutron are determined by a proton-recoil telescope (Pilot B scintillation plastic) which provides the source for proton-recoils and defines the dE/dX versus E method for particle identification and energy determination. The telescope is embedded in a scintillation plastic guard counter envelope which eliminates the unwanted charged particle background as well as recoil protons (electrons) whose energies and direction do not satisfy neutron (gamma-ray) detection requirements, respectively. Results from a Monte Carlo calculation indicate that the overall average efficiency within an average angular acceptance of about 29 deg (FWHM) is approximately (2.25 plus or minus 0.113) x 10/sup -4/. The inflight calibration procedure, the main frame data bit error analysis, and the method for determining the orientation of the detector axis in the spacecraft spin plane are described. Results indicate a discrepancy in the measured (0.461 x 10/sup -2/ plus or minus 0.254 x 10/sup -2/ n/cm/sup 2/sec) and theoretical (2 to 70 n/cm/ …
Date:
February 1, 1974
Creator:
Young, F.
System:
The UNT Digital Library
Kinetics of radiolytic gas phase reactions by modulated molecular beam mass spectrometry
None
Date:
November 1, 1974
Creator:
Kruger, V.R.P.
System:
The UNT Digital Library
Development of a multiwire proportional chamber imaging system for neutron radiography
None
Date:
May 1, 1974
Creator:
Valentine, K.H.
System:
The UNT Digital Library
Bonding and phase transition in (Ti,V)S solid solutions
None
Date:
March 1, 1974
Creator:
Leebrick, D.H.
System:
The UNT Digital Library
Determination of the neutron energy distribution from 8 to 20 MeV in a fast flux facility by using (n,2n) reactions as threshold monitors
None
Date:
July 1, 1974
Creator:
Gill, R.L.
System:
The UNT Digital Library
Piezoelectric response of bone and tendon subjected to inhomogeneous stress (Chapters I--IV)
None
Date:
October 1, 1974
Creator:
Breger, L.H.
System:
The UNT Digital Library
Scintillation response of lithium fluoride
Thesis. Lithium fluoride crystals, with TlF added to the charge, were prepared by the Bridgman- Stockbarger method. The scintillation response to photon energies between 25 and 1250 keV for these crystals and a commercially prepared LiF (Ti) crystal was studied. The response of the LiF (Ti) crystal was compared to the response of an NE109 scintillator at 1250 keV. The dose response of the LiF (Ti) crystal was evaluated over the energy range 25 to 1250 keV. The absorption and emission spectra of the LiF (Ti) crystal are discussed. A historical review precedes the discussion. (auth)
Date:
February 11, 1974
Creator:
Kloepping, R.J.
System:
The UNT Digital Library
Electrical and magneto-electrical resistivity of very dilute CuCr alloys
None
Date:
July 1, 1974
Creator:
Vyrostek, T.A.
System:
The UNT Digital Library
Low temperature studies. I. New antiferromagnetic resonance effects in the iron-group fluorides. II. Impedance matching a Josephson-effect galvanometer by means of a superconducting transformer
None
Date:
May 1, 1974
Creator:
Tennant, W.E.
System:
The UNT Digital Library