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**Partner:**UNT Libraries Government Documents Department

**Collection:**Technical Report Archive and Image Library

### Solidification and Separation of Ice From Saline Water

**Date:**March 1964

**Creator:**Adams, Clyde M., Jr. & Rohatgi, Pradeep K.

**Description:**None

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc11646/

### Solidification Modeling of a Spiral Casting to Determine Material Fluidity

**Date:**February 1994

**Creator:**Ahuja, S.; Domanus, H. M.; Schmitt, R. C.; Chuzhoy, L. & Grabel, J. V.

**Description:**In casting, fluidity is the measure of the distance a metal can flow in a channel before being stopped by solidification. During mold filling, the metal loses heat to the surrounding mold, thereby cooling and becoming more viscous until the leading portion solidifies and no further flow is possible. A coupled heat-transfer and fluid-flow modeling of a spiral, involving the use of thermophysical properties to determine material fluidity, has been conducted. Simulations of these experiments utilized the Casting Process Simulator (CaPS) software developed at Argonne National Laboratory. Two types of spiral geometries with different assumptions were considered: (1) a two-dimensional laterally stretched spiral and (2) a three-dimensional lateral spiral. The computer extent of mold filling is in good agreement with the experimental results. Time required by the metal/gas interface to attain specific positions in the spiral arm also compares favorably with the experimental results. The influence of process variables, especially pour time, is discussed. The CaPS software has been used as a computational tool to investigate the validity of the dimensionality assumptions and to evaluate the ability of CaPS to model fluidity adequately.

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc283160/

### Solidification of High-Level Radioactive Fuel Reprocessing Wastes by Spray and Pot Calcination: Hot-Cell Pilot Plant Studies

**Date:**September 1964

**Creator:**Allemann, R. T.; Roberts, F. P. & Upson, U. L.

**Description:**Report regarding the calcination of full level Purex and Redox waste carried out "in a remotely operated pilot plant consisting of a radiant-heat spray calciner and a pot calciner and their associated off-gas equipment" (p. 4). This contains details of the calcination, effects on the waste, and difficulties encountered.

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc100656/

### Solubility of water in hydrocarbons

**Date:**July 10, 1952

**Creator:**Hibbard, R R & Schalla, R L

**Description:**None

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc59325/

### A Solution of the Direct and Inverse Potential Problems for Arbitrary Cascades of Airfoils

**Date:**December 1, 1944

**Creator:**Mutterperl, William

**Description:**Methods are given of determining the potential flow plast an arbitrary cascade of airfoils and the inverse problem of determining an airfoil having a prescribed velocity distribution in cascade. Results indicated that Cartesian mapping function method may be satisfactorily extended to include cascades. Numerical calculation for computing cascades by Cartesian mapping function method is considerably greater than for single airfoils but much less than hitherto required for cascades. Detailed results are presented graphically.

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc61263/

### Solution of the General Nonlinear Programming Problem with Subroutine VMCOM

**Date:**July 1980

**Creator:**Crane, Roger L.; Hillstrom, Kenneth E. & Minkoff, Michael

**Description:**The solution of the general nonlinear programming problem by means of a subroutine called VMCON is described. VMCON uses an algorithm that solves a sequence of positive-definite quadratic programming sub-problems. Each solution determines a direction in which a one-dimensional minimization is performed. In developing this code, changes in the original implementation were made to make the program easier to use and maintain and to incorporate some recently developed LINPACK subprograms. The current implementation contains extensive in-line documentation; an interface subroutine, VMCON1, with a simplified calling sequence; and print options to aid the user in interpreting results.

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc283462/

### The solution of the laminar-boundary-layer equation for the flat plate for velocity and temperature fields for variable physical properties and for the diffusion field at high concentration

**Date:**May 1, 1950

**Creator:**Schuh, H

**Description:**In connection with Pohlhausen's solution for the temperature field on the flat plate, a series of formulas were indicated by means of which the velocity and temperature field for variable physical characteristics can be computed by an integral equation and an iteration method based on it. With it, the following cases were solved: On the assumption that the viscosity simply varies with the temperature while the other fluid properties remain constant, the velocity and temperature field on the heated and cooled plate, respectively, was computed at the Prandtl numbers 12.5 and 100 (viscous fluids). A closer study of these two cases resulted in general relations: The calculations for a gas of Pr number 0.7 (air) were conducted on the assumption that all fluid properties vary with the temperature, and the velocities are low enough for the heat of friction to be discounted. The result was a thickening of the boundary layers, but no appreciable modification in shearing stress or heat-transfer coefficient.

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc63026/

### A solution of the Navier-Stokes equation for source and sink flows of a viscous heat-conducting compressible fluid

**Date:**February 1, 1952

**Creator:**Hess, Robert V

**Description:**None

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc56346/

### Solutions of laminar-boundary-equations which result in specific-weight-flow profiles locally exceeding free-stream values

**Date:**September 1, 1952

**Creator:**Brown, W Byron & Livingood, John N B

**Description:**Revised solutions of the laminar-boundary-layer equations for cases which involved cooling at the wall combined with large pressure gradients in the main stream produced specific-weight-flow profiles which locally exceeded free-stream values. Heat-transfer and friction coefficients, boundary-layer thicknesses, and velocity, temperature, and specific-weight-flow distributions resulting from the revised solutions are presented for Euler numbers of 0.5 and 1, stream-to-wall temperature ratios of 2 and 4, and cooling-air flow rates through porous walls designated by flow parameters of 0, -0.5, and -1.

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc56390/

### Solvent Extraction of Strontium, Cerium, and are Earths with D2EHPA, Part 2: Pilot Plant Studies

**Date:**February 1964

**Creator:**Richardson, G. L.

**Description:**Report that "presents the results of pilot plant studies on the application of the D2EHPA (di-2-ethylhexyl phosphoric acid) solvent system to the needs of the Hanford Waste Management Program" (p. 1).

**Contributing Partner:**UNT Libraries Government Documents Department

**Permallink:**digital.library.unt.edu/ark:/67531/metadc100640/