187
187
May 6, 2010
05/10
by
Jiusto, J. E.; Mc Vehil, G. E
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Effect of fatty alcohol monolayers on water droplets and condensation nuclei - fog properties
Topics: ALCOHOLS, WATER, CONDENSATION NUCLEI, DROPS (LIQUIDS), FATS, FOG, FOG DISPERSAL, WATER, ALCOHOL, FOG
A methodology investigation was initiated by the USATTC in the Canal Zone in February 1976 to provide a further understanding of the basic processes that lead to water damage of material in storage containers, and to enhance knowledge of thermal buildup on surfaces and in the air inside storage containers. The investigation revealed that moisture conditions inside storage containers were influenced significantly by the materials inside those containers. With increasing temperature, the...
Topics: DTIC Archive, Portig,Wilfried H, ARMY TROPIC TEST CENTER APO MIAMI 34004, *CONTAINERS, *STORAGE,...
This supplement announces the incorporation of the latest aircraft emission database (EPA, 1992) and the latest motor vehicle database (Mobile 5a) into the Emissions and Dispersion Modeling System (EDMS). (The Clean Air Act Amendments of 1990 requires that the latest emission information be used to establish the Conformity of an airport improvement project with the State Implementation Plan.) This supplement also documents the following model enhancements: (1) an expansion of the emissions...
Topics: DTIC Archive, Segal, H M, FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF ENVIRONMENT AND...
Transient to steady motions of a vapor caused by the evaporation and condensation processes occurring at the condensed phases placed in parallel have been studied based on the Boltzmann equation of BGK type. As the internal structures of the condensed phases, the temperature fields are taken into account. Because of this, the temperatures of the interfaces become unknown parameters and, therefore, the condition of the continuity of energy flow across the interface has to be imposed...
Topics: DTIC Archive, Onishi, Yoshimoto, TOTTORI UNIV (JAPAN), *VAPORS, *FLOW FIELDS, *EVAPORATION,...
This report presents a study of the characteristics of a radiation detection system for the analysis of radioactive noble gases. The sample gas is condensed in a chamber between two planar lithium-drifted silicon semiconductor detectors. The analysis was limited to two radioisotopes of xenon, 131mXe and 133Xe, which are produced in nuclear fission. Xray spectroscopy was used in an attempt to quantify 131mXe in the presence of 133Xe. In previous research using this system, the sample gas...
Topics: DTIC Archive, Andrews,Wayne Linwood , Jr, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...
The purpose of the study is to identify the effector molecules that act as a link between cell proliferation, cell survival and chromosomes stability. We have hypothesized that chromosomal segregation and apoptotic pathways are linked and have a role in the development of aneuploidy in breast tumors. Rad2l is one of the major cohesin subunits that holds sister chromatids together until anaphase, when proteolytic cleavage by separase, allows chromosomal separation. We show that cleavage of human...
Topics: DTIC Archive, Pati, Debananda, BAYLOR COLL OF MEDICINE HOUSTON TX, *BREAST CANCER, *APOPTOSIS,...
The U.S. Army Tank Automotive Research, Development, and Engineering Center (TARDEC) and the Defense Advanced Project Agency (DARPA) are partnering to develop fundamentally new water technologies to reduce the logistics footprint and enable the development of a decentralized water support concept. The individual soldier requires 1.5 to 3.5 gallons per day to prevent dehydration. When personal hygiene, meal rehydration, and emergency medical treatment are included the daily planning factor...
Topics: DTIC Archive, ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI, *EXHAUST...
Two different approaches for modeling the clustering in rapidly expanding plumes have been reported in the literature. The first approach, known as the classical approach, takes its starting point from the classical nucleation theory (CNT) which is based on equilibrium thermodynamics. The second one, known as the kinetic approach, treats nucleation as the process of kinetic chemical aggregation. The first, macroscopic, approach, while being useful and found to be applicable for a number of flow...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE, *HOMOGENEITY, *MODELS,...
The objective of the present investigation has been to obtain further information concerning the condensation process in expanding flows. To this end, molecular beams formed from expansions of argon, nitrogen, carbon dioxide, nitric oxide, krypton, and a 10% krypton/argon mixture have been analyzed with a quadrupole mass spectrometer and a metastable velocity analyzer. By varying the energy of the ionizing electrons, it has been found that (1) at low source pressures, it can be assumed that the...
Topics: DTIC Archive, Bailey, A B, ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN, *CONDENSATION, *JET...
Chemical reactions important in molecular lasers were studied with a special emphasis on atomic recombinations and on dissociation of diatomic molecules. The experiments involved flash photolysis and shock wave techniques. The results were explained in terms of 3-D trajectory calculations. (Author)
Topics: DTIC Archive, Burns,George, TORONTO UNIV (ONTARIO) DEPT OF CHEMISTRY, *PHOTOLYSIS, *RECOMBINATION...
90
90
Oct 7, 2015
10/15
by
Poole, William M.
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ADA136967
Topic: Condensation (Meteorology).,Heat,Transmission,Exterior walls,Thermal properties
425
425
Feb 25, 2009
02/09
by
Barus, Carl, 1856-1935; Joslin, Lulu Broadbent
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Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Topics: Condensation, Atmospheric nucleation, Ionization of gases
Source: http://books.google.com/books?id=7eMCH2niQYwC&oe=UTF-8
A detailed 1D model of the stratocumulus-topped marine boundary layer is described. The model has three coupled components: a microphysics module that resolves the size distributions of aerosols and cloud droplets, a turbulence module that treats vertical mixing between layers, and a multiple wavelength radiative transfer module that calculates radiative heating rates and cloud optical properties. The results of a 12-h model simulation reproduce reasonably well the bulk thermodynamics,...
Topics: NASA Technical Reports Server (NTRS), RADIATIVE TRANSFER, STRATOCUMULUS CLOUDS, ATMOSPHERIC...
The propellant combination that offers optimum performance is very reactive with a low average molecular weight of the resulting combustion products. Propellant combinations such as oxygen and hydrogen meet the above criteria, however, the propellants in gaseous form require large propellant tanks due to the low density of gas. Thus, rocketry employs cryogenic refrigeration to provide a more dense propellant stored as a liquid. In addition to propellant liquefaction, cryogenic refrigeration can...
Topics: NASA Technical Reports Server (NTRS), DENSIFICATION, HEAT TRANSFER COEFFICIENTS, LIQUEFACTION,...
The fire/smoke alarm response of a condensation nuclei fire detector (CNFD) was compared with photoelectric and ionization detectors. Tests were conducted in a former control room 8.5 m by 8.9 with a 2.7 m ceiling. The room had air supplied from above the ceiling and under the floor with return air exiting from ceiling grills. The environment was varied from 278 to 305 K and relative humidities from 8 to 65%. Four detection zones were located in the room. Each zone contained a sampling head for...
Topics: NASA Technical Reports Server (NTRS), CONDENSATION NUCLEI, FIRE PREVENTION, IONIZATION GAGES,...
The presence of a hexafluoroisopropylidene (6F) connecting group in aryl dianhydrides used to prepare aromatic condensation polyimides provides high glass transition temperature (T sub g) polyimides with excellent thermo-oxidative stability. The purpose of this study was to determine if a trifluorophenyl-ethylidene (3F) connecting group would have a similar effect on the T sub g of aromatic condensation polyimides. A new dianhydride containing the 3F connecting group was synthesized. This...
Topics: NASA Technical Reports Server (NTRS), CONDENSATION, GLASS, GLASS TRANSITION TEMPERATURE, HIGH...
In the context of an overall development of transonic, cryogenic wnd tunnel technology, NASA has been investigating the onset of condensation effects in nitrogen gas. The temperature at which condensation occurs determines the minimum operating temperature (MOT) of cryogenic tunnels. The apparatus and airfoils are discussed, taking into account a description of the 0.3-m Transonic Cryogenic Tunnel (TCT), the drag rake, the airfoils, and the technique used for determining the onset of...
Topics: NASA Technical Reports Server (NTRS), AIRFOILS, CONDENSATION NUCLEI, CRYOGENIC WIND TUNNELS,...
This study develops more computationally efficient versions of the TwO-Moment Aerosol Sectional (TOMAS) microphysics algorithms, collectively called Fast TOMAS. Several methods for speeding up the algorithm were attempted, but only reducing the number of size sections was adopted. Fast TOMAS models, coupled to the GISS GCM II-prime, require a new coagulation algorithm with less restrictive size resolution assumptions but only minor changes in other processes. Fast TOMAS models have been...
Topics: NASA Technical Reports Server (NTRS), CLOUD PHYSICS, AEROSOLS, THREE DIMENSIONAL MODELS,...
There were two principal objectives of the cooperative agreement between NASA and the University of Denver. The first goal was to modify the design of the ER-2 condensation nuclei counter (CNC) so that the effective lower detection limit would be improved at high altitudes. This improvement was sought because, in the instrument used prior to 1993, diffusion losses prevented the smallest detectable particles from reaching the detection volume of the instrument during operation at low pressure....
Topics: NASA Technical Reports Server (NTRS), STRATOSPHERE, PARTICLES, DETECTION, CONDENSATION NUCLEI, U-2...
Condensation heat transfer in a horizontal rectangular duct was experimentally and analytically investigated. To prevent the dripping of condensate on the film, the experiment was conducted inside a horizontal rectangular duct with vapor condensing only on the bottom cooled plate of the duct. R-113 and FC-72 (Fluorinert Electronic Fluid developed by the 3M Company) were used as the condensing fluids. The experimental program included measurements of film thickness, local and average heat...
Topics: NASA Technical Reports Server (NTRS), DUCTED FLOW, FILM CONDENSATION, HEAT TRANSFER, TWO PHASE...
A cloud rift is characterized as a large-scale, persistent area of broken, low reflectivity stratocumulus clouds usually surrounded by a solid deck of stratocumulus. A rift observed off the coast of Monterey Bay, California on 16 July 1999 was studied to compare the aerosol and cloud microphysical properties in the rift with those of the surrounding solid stratus deck. Variables measured from an instrumented aircraft included temperature, water vapor, and cloud liquid water. These measurements...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, CLOUD PHYSICS, GEOLOGICAL FAULTS, STRATOCUMULUS...
Aerosols and especially their effect on clouds are one of the key components of the climate system and the hydrological cycle [Ramanathan et al., 2001]. Yet, the aerosol effect on clouds remains largely unknown and the processes involved not well understood. A recent report published by the National Academy of Science states "The greatest uncertainty about the aerosol climate forcing - indeed, the largest of all the uncertainties about global climate forcing - is probably the indirect...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, CLOUDS (METEOROLOGY), ATMOSPHERIC MODELS,...
5
5.0
Dec 19, 2018
12/18
by
Icoaraci Angelo Santana Meira
software
eye 5
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Tachyon Space Ship XTEXA up26 - it opens up the hyperspace jump tunnel.
Topics: hyperspace, hyperdrive, hyperspace travel, hyperspace ship, hyperspace jump, tachyon, tachyons,...
An experimental apparatus was designed, constructed and instrumented in an effort to systematically and carefully study the condensation heat-transfer coefficient on a single, horizontal tube. A smooth, thick-walled copper tube of length 133.5 mm, with an outside diameter of 15.9 mm and an inside diameter of 12.7 mm was instrumented with six wall thermocouples. The temperature rise across the test section was measured accurately using quartz crystal thermometers. The inside heat-transfer...
Topics: DTIC Archive, Graber,Kenneth A, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *Condenser tubes, *Heat...
An apparatus for measurement of the permeability of oxygen gas through liquid boric oxide as a function to temperature was designed and built. Numerous difficulties were encountered in the course of this study, the most intractable being the uptake of oxygen by vessel wall materials at rates which swamped the rate of transport across the liquid boric oxide film separating vessels with differing initial oxygen levels, resulting in data with an unusably low signal-to-noise ration. A burner and...
Topics: DTIC Archive, King,Merrill K, ATLANTIC RESEARCH CORP ALEXANDRIA VA, *PERMEABILITY, *OXYGEN,...
Analysis of aerosol and fog droplet data has shown that fogs are composed of zones with various supersaturations and subsaturation. A technique to quantify the subsaturations as well as the supersaturations has been developed. This has enable calculations to be made of droplet growth and evaporation of the droplet spectra. These preliminary approximations are consistent with the measured time evolutions of the fog. The largest nuclei (lowest critical supersaturation) FCN were definitely found...
Topics: DTIC Archive, Hudson,James G, NEVADA UNIV RENO DESERT RESEARCH INST, *FOG, *DROPS, *VISIBILITY,...
A new soluble, low band-gap polymer, poly(2,3-dihexylthieno3,4-B pyrazine), which is dark blue-black in the neutral state and which becomes transparent light yellow when doped has been prepared and studied. The preparation involves a multistep synthesis which involves condensation of 3,4- diaminothiophene with 7,8-tetradecanedione to produce 2,3-dihexylthieno3,4-B pyrazine which is polymerized with ferric chloride. Poly(2,3-dihexylthieno3,4-B pyrazine) has a doped film conductivity of 3.6 x...
Topics: DTIC Archive, Pomerantz, Martin, TEXAS UNIV AT ARLINGTON CENTER FOR ADVANCED POLYMER RESEARCH,...
The specific research objectives of this grant were on mathematical modeling of ultrafast condensed phase reactions with and without pressure gradients generated by the reaction and on investigation of combustion characteristics of reacting systems consisting of nanopowders. One-dimensional mathematical models were derived and solved numerically. These models predict qualitatively combustion from propagation in such reacting systems. It was also found that surface functionalization of aluminum...
Topics: DTIC Archive, Puszynski, Jan A, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY RAPID CITY,...
A nozzle simulation code developed for AEDC is designed for the analysis of hypersonic converging-diverging nozzles including the effects of high pressure, finite-rate chemical reactions and vibrational relaxation, and turbulent wall boundary layers. In addition, a module has been written to predict the onset of water vapor condensation for hydrocarbon combustion product test gases. The flow solver is based on the data-parallel line relaxation (DPLR) numerical technique. The software package...
Topics: DTIC Archive, Candler, Graham V, MINNESOTA UNIV MINNEAPOLIS DEPT OF AEROSPACE ENGINEERING AND...
A study of JA2 ignition using high-power (3 kW) pulsed Nd: glass lasers at low loading densities was undertaken to help construct models for predicting initial pressurization in bombs at high loading densities. Comparisons were made with results of experiments using a low-power (0.1 kW) continuous wave (cw) CO2 laser. Differences in wavelength dependence of optical properties and time dependence of the laser pulse were considered. Measured infrared (IR) emission delays agreed with the...
Topics: DTIC Archive, Cohen, A., ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD, *LASER APPLICATIONS,...
Previous reports suggest that the choice of base catalyst affects both the kinetics and structural evolution of SiO2 gelation from tetraethoxysilane (TEOS). Furthermore, these effects have been attributed to the interaction of the alkaline cations with charged silicate fragments. In this study, NMR analysis of alkali-metal nuclei and of 29Si directly shows that during the condensation of silicon alkoxides in basic alcohol solutions, cations form ion-pair complexes with negatively charged...
Topics: DTIC Archive, Sanchez, J, MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND MATERIALS...
An in-depth investigation of integral asymmetric poly(vinylidene fluoride) (PVDF) membranes has been carried out for the extraction of polar and non-polar organic compounds from dilute organic-in-water feed solutions. Membrane performance for low and high- boiling non-polar organic feed components was excellent, with separation factors as high as 4900 and high organic transmembrane fluxes. Polar organic feed components such as ethanol and acetone were also separated effectively from water but...
Topics: DTIC Archive, Jian, K., TULANE UNIV NEW ORLEANS LA DEPT OF CHEMISTRY, *ASYMMETRY, *ORGANIC...
The excellent high temperature mechanical properties of polyimide resins have lead to their increasing use in high performance applications. Present employment of this material includes fiber-reinforced composite structures, bearings, seals, valve seats, bushings, piston rings, electrical connectors, switch components, abrasive wheel binders, aircraft interior panels, circuit boards, and jet engine parts including engine cowlings and high speed fan blades 1-6. Both thermoplastic and...
Topics: DTIC Archive, Colaluca, Mario A., TEXAS A AND M UNIV COLLEGE STATION DEPT OF MECHANICAL...
The Corps of Engineers is responsible for maintaining numerous steel structures that are subjected to conditions of constant condensation inside locks and dams. The surfaces of these structures normally can be blast cleaned to a white metal grade, but condensation and/or water leaking around seals immediately make the surfaces too wet for the application of many coatings. The coatings industry has recently developed and marketed new coatings that adhere to wet or damp steel. In this study a...
Topics: DTIC Archive, Beitelman, Alfred D., CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL,...
Topics: DTIC Archive, London, Julius, NEW YORK UNIV NY, *CLIMATE, *METEOROLOGY, *THERMAL RADIATION, CLOUDS,...
This thesis describes the results of a theoretical study to predict the thermal behavior of an internally-cooled tube in a condensing vapor. The analysis constitutes a unique application of the finite element method and provides new insights into the effects of circumferential conduction upon condenser tube performance. Comparisons are made between the present analysis and the theoretical and experimental works of others. The inclusion of circumferential conduction leads to an improvement in...
Topics: DTIC Archive, Holland,Howard Michael, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *THERMAL PROPERTIES,...
This thesis describes the results of a theoretical study to predict the thermal behavior of an internally-cooled tube in a condensing vapor. The analysis constitutes a unique application of the finite element method and provides new insights into the effects of circumferential conduction upon condenser tube performance. Comparisons are made between the present analysis and the theoretical and experimental works of others. The inclusion of circumferential conduction leads to an improvement in...
Topics: DTIC Archive, Holland,Howard Michael, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *THERMAL PROPERTIES,...
We investigate a model for the decay of flare heated coronal loops in which rapid radiative cooling at the loop base creates strong pressure gradients which, in turn, generate large (supersonic) downward flows. Hence, the coronal material cools and 'condenses' onto the flare chromosphere. The important features of this model which distinguish it from previous models of flare cooling are: (1) Most of the thermal energy of the coronal plasma may be lost by mass motion rather than by conduction or...
Topics: DTIC Archive, Antiochos,S K, STANFORD UNIV CA INST FOR PLASMA RESEARCH, *PLASMAS(PHYSICS),...
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114
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eye 114
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generalmanual 000072010
Topics: les, des, moniteur, monitor, est, pour, pas, une, sur, dans, electronics display, signal cable, cet...
The synthesis of thermally stable heterocyclic polymers (polybenzoxazole and polyoxadiazole are described, and the addition and condensation reactions used are discussed. (LS-PL).
Topics: DTIC Archive, Chernikhov,A Y, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, *Polymers,...
Aerosol direct fluorination of neopentyl chloride produces perfluoroneopentyl chloride in 74% yields. Analogous fluorination of neopentyl bromide produces perfluoroisopentane in 63% yield. Data is presented which supports a carbocation rearrangement in the fluorination of neopentyl bromide. The carbocations are presumed to arise from disproportionation of neopentyl bromide fluorides.
Topics: DTIC Archive, Adcock,James J, TENNESSEE UNIV KNOXVILLE DEPT OF CHEMISTRY, *Aerosols, *Fluorination,...
Steam-condensation heat-transfer measurements were made using a 5-tube in-line test condenser with an additional perforated tube to simulate up to 30 active tubes. Results were obtained for smooth tubes, wire-wrapped tubes and dropwise-coated tubes. The average outside heat-transfer coefficient for 30 smooth tubes was 0.64 times the Nusselt coefficient for the first tube. A total of eight wirediameter and wire-pitch combinations were tested: 1.6-mmdiameter wire wrapped at 16 mm, 7.6 mm and 4 mm...
Topics: Mechanical engineering, Steam condensation, heat-transfer coefficient, inundation, smooth,...
187
187
Jan 26, 2016
01/16
by
Kenneth Udut
movies
eye 187
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#Fastfood #cup #trick I believe the tripping cup on nice wood. Condensation drips, wood swells. Leaves ring. Get yelled at. #Science #true-htPAT9Ql7iV.mp4
Topics: treat, subject, power, power, hole, form, alignment, align, adjust, Fastfood, cup, trick I believe...
Half-space problem of weak evaporation and condensation of a binary mixture of vapors is investigated on the basis of the BGK-type Boltzmann model. By a systematic asymptotic analysis, it is shown that the steady evaporation and condensation takes place only if the parameters that characterize the state of the condensed phase and that of the vapors at a far distance satisfy one relation for the condensation case and three relations for the evaporation case. As an application, the resulting...
Topics: DTIC Archive, Takata, Shigeru, KYOTO UNIV (JAPAN) DEPT OF AERONAUTICS AND ASTRONAUTICS, *VAPORS,...
A one-day programme was conducted for motivating the students of MBA, numbering about 250, at Vagehwari Engineering College, Karimnagar. The live recording of the presentations made is being uploaded here. It is suggested that it would be better to simultaneously view the power point presentations â while listening to the audio recording. The topics covered were Inspiration, Becoming a better Student, Study Skills, Personality Development, and Improving Communication Skills. English was the...
Topic: Inspiration, List of things to be done, getting ahead, getting started, action, blame, expect, do,...
The report gives results of an evaluation of the heat transfer performance of pure hydrofluorocarbon (HFC)-236ea for high performance enhanced tubes which had not been previously used in Navy shipboard chillers. Shell-side heat transfer coefficient data are presented for condensation on a Turbo-CII tube, pool boiling on Turbo-B and -BII tubes, and spray evaporation on Turbo-B and -CII tubes and a 1575-fpm (fin-per-meter) tube. These tubes have nominal outside diameters of 19.1 mm (3/4-in.), and...
Topics: DTIC Archive, Tzuoo, S. M., IOWA STATE UNIV AMES DEPT OF MECHANICAL ENGINEERING, *HEAT TRANSFER,...
This paper addresses a previously unknown complex interdisciplinary process providing a feedback loop which may have a major impact on the effect on global climate of the steadily increasing growth of greenhouse gases in the atmosphere.... Solar radiation, Cloud condensation.
Topics: DTIC Archive, Zachariasen, F, MITRE CORP MCLEAN VA JASON PROGRAM OFFICE, *CLOUDS, *AEROSOLS,...
In the past year, the PI s research on the fundamental properties and applications of nanoclusters has been centered around gold and silver, and many different models have been developed to address the core packing, electron configurations and to explain some of the observed optical properties. Gold and silver in their atomic state shares the same number of valence electrons and bulk packing distance. In this report, we summarize our recent work on silver based nanoclusters. Recent work...
Topics: DTIC Archive, MICHIGAN UNIV ANN ARBOR, *CLUSTERING, *OPTICAL PROPERTIES, CELLS(BIOLOGY),...
4
4.0
Dec 14, 2020
12/20
by
Glover, David, 1953 September 4-
texts
eye 4
favorite 1
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32 pages : 25 cm
Topics: Air -- Juvenile literature, Air -- Experiments -- Juvenile literature, Water -- Juvenile...
Heat-transfer measurements were made for filmwise condensation of steam on smooth tubes and finned tubes with rectangular-shaped fins. The influence of fin root diameter on a single horizontal finned tube was examined by taking data for two families of tubes whose fin root diameters were 12.7 and 19.05 mm. Each family of tubes had fins that were 1 mm thick and 1 mm high but with fin spacings of 0.25, 0.50, 1.0, 1.5, 2.0, and 4.0 mm. To compare results being obtained in a concurrent research...
Topics: Filmwise condensation, Low integral-fin tubes, Outside heat-transfer coefficient, Condensate...
