Engineering Commons^™

Study Of Heat And Mass Transfer Through Non-Wettable Porous Membrane, Rajender Kumar Rohatgi

Masters Theses

"The object of this investigation was to study the use of non-wettable porous membranes for simultaneous heat transfer and mass transfer of water from a hot salt solution stream to a cold distilled water stream, the streams being in countercurrent flow separated by the membrane. This type of mass transfer was achieved in the experiments, and mass and heat transfer coefficients were measured.

The membranes studied in this work were made of fiberglas treated with Teflon dispersion and aluminum sulphate. The fiberglas membranes yielded desired results. Empirical correlations were proposed which predict values of heat and mass transfer coefficients close …

Fluid Flow In Pipes Of Rectangular Cross Sections, Bruce Harold Bradford

Masters Theses

"Head loss due to fluid friction was measured in smooth conduits of rectangular cross section. The data covers the laminar and turbulent range. Results were compared with previous theoretical and empirical data.

The customary practice of calculating head loss in non-circular conduits by use of the friction factor obtained on an “equivalent” circular pipe was discussed. It was found that this practice is successful in square cross sections undergoing turbulent flow. In laminar flow, however, this method is not accurate"--Abstract, page ii.

A Procedure For Analysis Of Three-Segment Symmetrical Balcony Beams, Ronald A. Hansen

Masters Theses

"A procedure for analysis of three-segment symmetrical balcony beams unsymmetrically loaded was derived whereby the normally complicated energy solution is eliminated. A moment distribution technique is used in the solution of the first and second phases of the problem. Tables are given to aid in determining the proper distribution factors. Due to the complexity of the third phase, a table of solutions is given for varying values of length, geometry, etc.. An example problem is also given demonstrating the use of interpolation within the tables"--Abstract, page ii.

A Study Of The Effect Of Magnetite Additions To Shell Molds On The Surface Quality Of Low Carbon Steel Castings, Robert C. Tooke

Masters Theses

"Shell molds containing additions of ten to fifty percent magnetite, Fe₃O₄, of various particle sizes were cured by induction heating. For comparison, regular shell molds were made using silica and zircon sand. Low carbon steel was cast into all of the molds.

Castings produced from the regular shell molds exhibited poor surfaces due to mold expansion. Magnetite additions eliminated the expansion defects from the casting surfaces.

Excellent surfaces were obtained on the low carbon steel castings with proper selection of the magnetite particle size and the percent of magnetite added. Improper combinations of size and amount …

The Effect Of Initial Moisture Content On The Swelling Characteristics Of Putnam Soil, William Howell Branum

Masters Theses

"The literature on swell and swell pressure in expansive soils was reviewed. The effect of initial moisture content on the swelling properties of untreated Putnam silt loam was investigated by performing free swell and swell pressure tests on specimens with varying initial moisture contents compacted to a constant dry density. The free swell tests were conducted by allowing the samples to swell freely under a low load (the weight of the plunger and the porous stone in the swelling apparatus) and measuring the volume change that resulted. The swell pressure tests were performed using two different procedures: (1) determining the …

Correlation Of Drag Reducing Data In Dilute Polymer Solutions, Jorge Mario Rodriguez

Masters Theses

"The purpose of this investigation was to obtain a correlation for drag reducing solutions in circular tubes under turbulent conditions. Data were taken for three polymer-solvent systems: polymethyl methacrylate V-100 (M_v ~ 110,000) in toluene, polyisobutylene L-200 (M_v ~ 4,700,000) in toluene, and polyisobutylene L-200 in cyclohexane. The data from the two polyisobutylene systems, together with other data on polymethyl methacrylate G (M_v ~ 1,500,000) in toluene and polyisobutylene L-80 (M_v ~ 860,000) in cyclohexane, were used to attempt to obtain the correlation. The V-100 solutions were not used because they were not drag reducing.

The …

Two-Dimensional Seismic Model Studies, Joong Hee Chun

Masters Theses

"The purpose of this research was to design and construct apparatus suitable for two-dimensional seismic model studies.

A new technique for two-dimensional seismic model testing was devised which allows wide application of the equipment. This enabled the author to place the source and receiver in any desired position on the model, thereby permitting the recording of seismic events as function of distance and depth at any position

Two simple geometric models were tested to demonstrate the experimental range of the apparatus designed. The recorded data were compared with theoretical predictions and were found to be in good agreement"--Abstract, page ii.

Tensile Strength Of Prereacted Porcelain Compositions, Chester Lee Hill

Masters Theses

"The tensile strengths of two porcelain compositions containing prereacted silica and feldspar have been determined with the diametral loading technique. A comparison was made between the strength of the prereacted samples and the strength of samples of the same compositions, but prepared in the conventional manner. At the optimum firing temperature, no significant differences in tensile strengths were observed between the prereacted and control samples for the two compositions studied. At temperatures below and above the optimum firing temperature, the prereacted samples had the higher tensile strengths. The tensile strengths are correlated with the average size of the quartz particles …

The Effect Of Concentration On The Viscosity Of Polyisobutylene Solutions, Lung-Yu Chou

Masters Theses

"In the past twenty years the viscosity of dilute polymer solutions (i.e., where the solute molecules are far apart) has been investigated in great detail, both theoretically and experimentally. The viscosity characteristics of such systems are well-understood.

Only a few studies have been made of the effect of concentration on the viscosity of polymer solutions in the concentration range where the polymer molecules begin to overlap. This range of concentrations is important in practical applications such as dry spinning of fibers, cross-graded automotive motor oils and in many industrial formulations where polymers are used to thicken solvent vehicles. Development of …

A Study Of Sedimentation In A Well Regulated Major Drainage Basin - The Monongehala, Allegheny And Upper Ohio Rivers, William S. Wood

Masters Theses

"This investigation is concerned with the study of various programs employed in reducing and controlling sediment. The measures employed by the U.S. Soil Conservation and Forestry Services to control and reduce erosion, the primary source of sediment, was studied. The flood control and river navigation structures constructed and operated by the U.S. Army Corps of Engineers and the effect of these structures on sedimentation was also evaluated. State and local community regulation and control of exploited natural resources was studied to determine their influence on the generation and control of sediment.
The Allegheny, Monongehala and upper Ohio River Drainage Basin …

A Fluid Control System For Nuclear Reactors, Roger Alan Crane

Masters Theses

"This thesis presents both an experimental and analytical analysis of the scram characteristics of a fluid control system for a nuclear reactor. This control system utilizes a control tube containing a neutron-absorbing fluid. The level of the fluid inside of the tube is then regulated by means of' a pressurized gas and offers a number of unique advantages over the conventional control rod system using linear absorber rods.

The effect of varying the level-control pressure and initial height of the fluid column is determined and evaluated. The time required to complete a scram with the fluid control system is compared …

Application Of Statistical Quality Control Procedures To Production Of Highway Pavement Concrete : Technical Paper, Steven John Hanna, John Francis Mclaughlin, A. P. Lott

JTRP Technical Reports

No abstract provided.

Laboratory And Field Evaluation Of The Nuclear Moisture And Density Meters, T. G. Williamson, Matthew W. Witczak

JTRP Technical Reports

No abstract provided.

Evaluation Of Delays And Accidents At Intersections To Warrant Construction Of A Median Lane, Robert B. Shaw

JTRP Technical Reports

No abstract provided.

Statistical Modeling Of Travel Speeds And Delays On A High-Volume Highway : Technical Paper, Theodore B. Treadway, Joseph C. Oppenlander

JTRP Technical Reports

No abstract provided.

Correlation Of Design Characteristics And Operational Controls With Accident Rates On Urban Arterials, Thomas Mulinazzi

JTRP Technical Reports

No abstract provided.

Evaluation Of Safety At Railroad-Highway Grade Crossings In Urban Areas, William D. Berg

JTRP Technical Reports

No abstract provided.

Scheduling Traffic Signal Maintenance: Technical Paper, Thorold G. Smith, Joseph C. Oppenlander

JTRP Technical Reports

No abstract provided.

Extension Of Road Test Performance Concepts, Milton Edward Harr, William Joseph Head

JTRP Technical Reports

No abstract provided.

Factors Influencing The Application Of Nuclear Techniques To Soil Compaction Control, T. G. Williamson

JTRP Technical Reports

No abstract provided.

Evaluation Of Delays And Accidents At Intersections For Median Lane Construction : Technical Paper, Robert B. Shaw, Harold L. Michael

JTRP Technical Reports

No abstract provided.

Effects Of A Change In The Control Device On Intersection Accidents, George W. Schoene

JTRP Technical Reports

No abstract provided.

The Influence Of Fine Aggregate Gradation Characteristics On Air Entrainment In Portland Cement Mortar, D. W. Deno

JTRP Technical Reports

No abstract provided.

Weed Control In Roadside Plantings : Progress Report, Frederick O. Lanphear, Ronald L. Spangler

JTRP Technical Reports

No abstract provided.

Effects Of A Change In The Control Device On Intersection Accidents : Technical Paper, George W. Schoene, Harold L. Michael

JTRP Technical Reports

No abstract provided.

An Optimum Multisensor Approach For Detailed Engineering Soils Mapping, Volume I : Progress Report, Harold Teddy Rib

JTRP Technical Reports

No abstract provided.

Invariant Properties Of A Sheet Asphalt Mixture, Narindra Bansi Lal, William Harner Goetz, Milton Edward Harr

JTRP Technical Reports

No abstract provided.

An Analysis Of Neutron Resonance Detectors In Critical Uranyl-Fluoride Heavy Water Systems., William H. Roach

Nuclear Engineering ETDs

The measurement of neutron flux spectra in reactors is a problem which can be approached in several ways, depending on the information desired. For high energy measurements, threshold detectors are often used; if spatial information of the flux is required, some type of fission detector may be employed. For flux magnitude measurements in the epithermal energy range, foils of elements which have strong neutron absorption resonances are commonly utilized. If the resonance is sufficiently isolated from other resonances and the contribution from the resonance to the total resonance absorption integral of the element is large, then it is a fairly …

A Study Of The Supercooling Behavior Of High Purity Liquid Bismuth, B. L. Bramfitt

Doctoral Dissertations

"This investigation involves a study of the supercooling behavior of pure bismuth as affected by the melting atmosphere, the amount of superheat, and the intentional addition of metallic and non-metallic foreign materials to the melt. It was found that the amount of oxide on the melt surface is a controlling factor in the degree of supercooling obtainable in bismuth. In the presence of a thick bismuth oxide surface layer the amount of superheat below a 15°C drastically decreases the amount of supercooling due to the retention of nuclei in the surface film that promote nucleation upon cooling of the melt. …

Numerical Solution Of Water Hammer Analysis Including Friction Losses, Lih Hsun Weng

Masters Theses

"The water hammer phenomena is a very important problem in pipe lines and gate operations. There are many analytical solutions tor water hammer problems including friction losses, but most of them use a linear approximation tor the friction effect that is different from the actual situation. Also the existing methods for solving water hammer problems involve difficult mathematical operations that are impractical and inaccurate.

In order to find a more rapid method for solving water hammer problems including friction losses and to obtain closer agreement with the actual condition, the problem is solved here using the basic partial differential equations …