Relevant bibliographies by topics / Surface velocity field

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Surface velocity field'

Author: Grafiati
Published: 25 May 2024
Last updated: 31 July 2025

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Journal articles on the topic "Surface velocity field"

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Yuan, Xinzhe, Jian Wang, Bing Han, and Xiaoqing Wang. "Study on the Elimination Method of Wind Field Influence in Retrieving a Sea Surface Current Field." Sensors 22, no. 22 (2022): 8781. http://dx.doi.org/10.3390/s22228781.

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An along-the-track interferometric synthetic aperture radar (ATI-SAR) system can estimate the radial velocity of a moving target on the ground and on a sea surface current. This acquires the interference phase by combining two composite SAR images obtained by two antennas spatially separated along the direction of movement of the platform. The key to retrieving the sea surface current is to remove the interference of sea surface waves, wind-generated current, and Bragg phase velocity in the interference Doppler velocity. Previous methods removed the surface waves, Bragg phase velocity, and oth
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Gonçalves, Rafael C., Mohamed Iskandarani, Tamay Özgökmen, and W. Carlisle Thacker. "Reconstruction of Submesoscale Velocity Field from Surface Drifters." Journal of Physical Oceanography 49, no. 4 (2019): 941–58. http://dx.doi.org/10.1175/jpo-d-18-0025.1.

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AbstractThe extensive drifter deployment during the Lagrangian Submesoscale Experiment (LASER) provided observations of the surface velocity field in the northern Gulf of Mexico with high resolution in space and time. Here, we estimate the submesoscale velocity field sampled by those drifters using a procedure that statistically interpolates these data both spatially and temporally. Because the spacing of the drifters evolves with the flow, causing the resolution that they provide to vary in space and time, it is important to be able to characterize where and when the estimated velocity field
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Kim, Joon Hyun, and Joo-Hyun Kim. "Thermohydrodynamic Analysis of Surface Roughness in the Flow Field." Journal of Tribology 127, no. 2 (2005): 293–301. http://dx.doi.org/10.1115/1.1828072.

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The study deals with the development of a thermohydrodynamic (THD) computational procedure for evaluating the pressure, temperature, and velocity distributions in fluid films with a very rough geometry. A parametric investigation is performed to predict the bearing behaviors in the lubricating film with the absorbed layers and their interfaces as determined by rough surfaces with Gaussian distribution. The layers are expressed as functions of the standard deviations of each surface to characterize flow patterns between both rough surfaces. Velocity variations and heat generation are assumed to
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Melville, W. K., and Ronald J. Rapp. "The surface velocity field in steep and breaking waves." Journal of Fluid Mechanics 189 (April 1988): 1–22. http://dx.doi.org/10.1017/s0022112088000898.

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Coincident simultaneous measurements of the surface displacement and the horizontal velocity at the surface of steep and breaking waves are presented. The measurements involve a novel use of laser anemometry at the fluctuating air-water interface and clearly show the limitations of surface displacement measurements in characterizing steep and breaking wave fields. The measurements are used to examine the evolution of the surface drift velocity, spectra, wave envelopes, and forced long waves in unstable deep-water waves. Preliminary results of this work were reported by Melville & Rapp (198
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BAL, GUILLAUME, and KUI REN. "RECONSTRUCTION OF SINGULAR SURFACES BY SHAPE SENSITIVITY ANALYSIS AND LEVEL SET METHOD." Mathematical Models and Methods in Applied Sciences 16, no. 08 (2006): 1347–73. http://dx.doi.org/10.1142/s021820250600156x.

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We consider the reconstruction of singular surfaces from the over-determined boundary conditions of an elliptic problem. The problem arises in optical and impedance tomography, where void-like structure or cracks may be modeled as diffusion processes supported on co-dimension one surfaces. The reconstruction of such surfaces is obtained theoretically and numerically by combining a shape sensitivity analysis with a level set method. The shape sensitivity analysis is used to define a velocity field, which allows us to update the surface while decreasing a given cost function, which quantifies th
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Li, Chang He, Zhen Lu Han, and Jing Yao Li. "Investigation into Fluid Velocity Field of Wedge-Shaped Gap in Grinding." Applied Mechanics and Materials 37-38 (November 2010): 593–98. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.593.

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In the grinding process, grinding fluid is delivered for the purposes of chip flushing, cooling, lubrication and chemical protection of work surface. Hence, the conventional method of flood delivering coolant fluid by a nozzle in order to achieve high process performance purposivelly. However, hydrodynamic fluid pressure can be generated ahead of the grinding zone due to the wedge effect between wheel peripheral surface and part surface. In this paper, a theoretical fluid velocity field modeling is presented for flow of coolant fluid of wedge-shaped gap in flood delivery surface grinding, whic
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Yan, He, Qianru Hou, Guodong Jin, Xing Xu, Gong Zhang, and Daiyin Zhu. "Velocity Estimation of Ocean Surface Currents in along-Track InSAR System Based on Conditional Generative Adversarial Networks." Remote Sensing 13, no. 20 (2021): 4088. http://dx.doi.org/10.3390/rs13204088.

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Velocity estimation of ocean surface currents is of great significance in the fields of the fishery, shipping, sewage discharge, and military affairs. Over the last decade, along-track interferometric synthetic aperture radar (along-track InSAR) has been demonstrated to be one of the important instruments for large-area and high-resolution ocean surface current velocity estimation. The calculation method of the traditional ocean surface current velocity, as influenced by the large-scale wave orbital velocity and the Bragg wave phase velocity, cannot easily separate the current velocity, charac
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Yan, He, Qianru Hou, Guodong Jin, Xing Xu, Gong Zhang, and Daiyin Zhu. "Velocity Estimation of Ocean Surface Currents in along-Track InSAR System Based on Conditional Generative Adversarial Networks." Remote Sensing 13, no. 20 (2021): 4088. http://dx.doi.org/10.3390/rs13204088.

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Velocity estimation of ocean surface currents is of great significance in the fields of the fishery, shipping, sewage discharge, and military affairs. Over the last decade, along-track interferometric synthetic aperture radar (along-track InSAR) has been demonstrated to be one of the important instruments for large-area and high-resolution ocean surface current velocity estimation. The calculation method of the traditional ocean surface current velocity, as influenced by the large-scale wave orbital velocity and the Bragg wave phase velocity, cannot easily separate the current velocity, charac
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Lloyd, Peter M., Peter K. Stansby, and David J. Ball. "Unsteady surface-velocity field measurement using particle tracking velocimetry." Journal of Hydraulic Research 33, no. 4 (1995): 519–34. http://dx.doi.org/10.1080/00221689509498658.

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Arnold, E., T. Letavic, and S. Herko. "High-field electron velocity in silicon surface-accumulation layers." IEEE Electron Device Letters 20, no. 9 (1999): 490–92. http://dx.doi.org/10.1109/55.784462.

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Dissertations / Theses on the topic "Surface velocity field"

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Ahmed, Zahir Uddin. "An experimental and numerical study of surface interactions in turbulent swirling jets." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1790.

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Convective heat transfer and drying processes are found in industrial applications from gas turbine blade cooling to drying of food products and paper. In many instances, these processes rely on either a single or an array of fluid jets which impinge onto a surface. Traditionally, non-swirling impinging jets have been used, but interest surrounds possible advantages from imposing swirl into these jets to further promote heat and mass transfer at the surface. The challenge of resolving this question is that including swirl further complicates fluid-surface interactions. Studies are faced with t
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Baaklini, Georges. "Characterization of the Eastern Mediterranean surface dynamics : Insights from drifter assimilation and machine learning techniques." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS186.

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Une estimation précise de la circulation de surface est cruciale en raison de son impact direct sur les propriétés physiques et bio-géochimiques du du milieu marin. Cependant, l’estimation des courants reste un défi car le champ de circulation est affecté par des flux qui changent rapidement. Ce problème s’accentue en Méditerranée orientale, où les observations in-situ sont relativement rares et où les imprécisions des observations altimétriques augmentent. Par conséquent, certaines des caractéristiques de méso-échelle sont encore débattues ou inconnues, en particulier dans le bassin levantin.
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Harding, Samuel Frederick. "Unsteady velocities of energetic tidal currents : an investigation into dynamic flow effects on lifting surfaces at field and experimental scale." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8037.

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The generation of electricity from tidal currents is an emerging industry with the potential to contribute to the UK energy supply in a predictable and sustainable way. The development of the technology requires the cost effective subsea installation of energy conversion systems in an energetic and challenging marine environment. One concept developed for the fastening of tidal energy converters to the seabed is the Active Gravity Base (AGB), which offers potential reductions in installation cost and time, relative to existing fastening methods. The performance of this concept in response to u
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Taggart, Douglas Michael. "Determination of near-surface velocity fields in the CTZ using combined altimetric and inverse modelling techniques." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/26981.

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Approved for public release; distribution is unlimited<br>An inverse model involving AVHRR imagery and the heat equation with dynamical constraints on the divergence, kinetic energy and vorticity of the solutions was used by Kelly (1989) to produce velocity fields that were in good agreement with Acoustic Doppler Current Profiles (ADCP) data. Dynamic heights derived from GEOSAT radar altimeter data have also been used to determine near-surface geostrophic currents. Synthetic GEOSAT-derived velocity data was generated ADCP data collected as part of the Coastal Transition Zone (CTZ) Field Prog
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de, Naray Rachel Kuzio. "High resolution optical velocity fields of low surface brightness galaxies and the density profiles of dark matter halos." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7239.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Astronomy. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Lemon, Michael R. "Comparison of Los Alamos National Laboratory (LANL) Parallel Ocean Program (POP) model velocity fields with Pacific surface drifter measurements." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA341312.

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Thesis (M.S. in Physical Oceanography) Naval Postgraduate School, September 1997.<br>"September 1997." Thesis advisor(s): Julie L. McClean, Jeffrey D. Paduan. Includes bibliographical references (p. 111-114). Also available online.
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Su, Yuan-Te, and 蘇芫德. "Horizontal two-dimensional bed-load grain and water surface velocity fields in dam breach experiment." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/49359604400294478518.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>103<br>Dam breaching consists of water flow and sediment transport. The connections between water and bed-load velocity and dam breach topography changes in downstream are the purpose in this study. Previous researches are devoted to observe dam breach phenomenon from side view. From top view, the flow field changed by terrain and the surface flow can be observed. A simplified laboratory experiment is conducted to obtain horizontal two dimensional velocity fields. In order to compare water surface and bed-load velocity, we use two different color and density particl
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Books on the topic "Surface velocity field"

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Taggart, Douglas Michael. Determination of near-surface velocity fields in the CTZ using combined altimetric and inverse modelling techniques. Naval Postgraduate School, 1991.

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Gampert, B. The Influence of Polymer Additives on Velocity and Temperature Fields: Symposium Universität -- GH -- Essen, Germany, June 26-28, 1984. Springer Berlin Heidelberg, 1986.

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Lemon, Michael R. Comparison of Los Alamos National Laboratory (LANL) Parallel Ocean Program (POP) model velocity fields with Pacific surface drifter measurements. Naval Postgraduate School, 1997.

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Multiphase Flow Internal Corrosion Direct Assessment (MP-ICDA) Methodology for Pipelines. AMPP, 2022. https://doi.org/10.5006/nace_sp0116-2022.

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Scope This standard practice outlines a methodology to assess pipeline integrity because of the threat internal corrosion in onshore and offshore pipelines and other piping systems that normally carry multiphase fluids (gas, water, and oil) termed multiphase flow internal corrosion direct assessment (MP-ICDA). Liquid separators (drips), compressing stations, vessels, and other equipment not related to pipelines are not included in this standard. This standard applies to pipelines, and piping systems both onshore and offshore, containing carbon dioxide (CO2), hydrogen sulfide (H2S), oxygen (O2)
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Book chapters on the topic "Surface velocity field"

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Wang, Yong, Chen Xu, Changchun Li, Xiaofei Yao, Xingbo Xiang, and Haoxuan Huang. "Surface Vibration of Throw-Type Blast in an Open-Pit Mine." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2532-2_11.

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AbstractIn the process of Open-pit mining in China, throwing blasting is an important method, which is very likely to cause serious damage to the slope of the discharge field under the action of vibration load of throwing blasting. With the background of throwing blasting process in Heidaigou open-pit mine in Ordos, vibration velocity data were collected from the discharge field near the throwing blast, and the vibration signal of throwing blast was analyzed by means of Fourier transform to obtain the characteristics of throwing blast vibration velocity wave and the attenuation law and predict
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Erben, Andreas, Alexander Geist, Immanuel Voigt, et al. "Smart Pressure Film Sensor for Machine Tool Optimization and Characterization of the Dynamic Pressure Field on Machine Surfaces." In Lecture Notes in Production Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34486-2_14.

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AbstractKnowledge of thermal interactions with the environment is essential for improving the performance of machine tools. Therefore, it is necessary to detect and quantify the convective heat flows at machine tool surfaces, that occur in the workspace as a result of cutting fluid use or outside the machine due to active air flow. Thin-film sensors made of shape memory alloys with integrated small temperature sensors are suitable for detecting very fine pressure differences and can be used to estimate convective heat transfer. By measuring the pressure differences, the dynamic pressure field
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Yefimov, V. V., and B. A. Nelepo. "Aspects of the Velocity Field And Dispersion Relation In Surface Wind Waves." In Wave Dynamics and Radio Probing of the Ocean Surface. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-8980-4_13.

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Lan, Xinyu, Jingmei Zhang, and Hang Wang. "Hydraulic Characteristics of Undular Hydraulic Jumps Over Different Bed Roughness." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_42.

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AbstractOccurrence of undular hydraulic jumps has impact on sediment transport and bank erosion in estuarine areas. The hydraulic properties vary when it forms on a rough bed, leading to modification of turbulent mixing processes. This paper reports on a study of undular hydraulic jumps generated with different types of bed roughness including smooth, rough rubber-matted and grated beds. The experiment was conducted with a flow rate of 241 m3/h using acoustic displacement meters (ADMs) and an acoustic Doppler velocimeter (ADV). The obtained results reveal a discernible descending order in the
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Howard, Robert F. "Observations of Surface Velocity Fields." In The Internal Solar Angular Velocity. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3903-5_4.

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Jing, Ye, Xueting Lei, Jie Qin, Teng Wu, and Elikplim Agbemafle. "On Characterizing Flow Resistance in a Tidal Reach." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_134.

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AbstractThe tidal reaches are characterized by unsteady and non-uniform flow (UNF), which is significantly different from the commonly assumed steady and uniform flow (SUF) in hydraulics. The SUF shows invariant temporal and spatial flow characteristics, and thus flow acceleration is absent in a prismatic channel. However, for the UNF, the variation of flow velocity and depth in both temporal and spatial scales causes the loss of flow energy, and thus increases the flow resistance. In order to clarify the variation of flow resistance and its influencing factors in tidal reaches, this study inv
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Imawaki, Shiro, Hiroshi Uchida, Kaoru Ichikawa, and Daisuke Ambe. "Estimating the High-Resolution Mean Sea-Surface Velocity Field by Combined use of Altimeter and Drifter Data for Geoid Model Improvement." In Space Sciences Series of ISSI. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-1333-7_16.

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Torres-Bárcenas, Aram, Roberto Alejandro Vargas-Domínguez, Carlos Arturo Debernardi-Aguirre, Francisco Javier Solorio-Ordaz, and Rafael Chávez Martínez. "Effect of the Sierpinski Carpet on the Convective Flow on a Squared Fin Under Natural Convection." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_32.

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AbstractThe present experimental work is aimed to study the convective flow generated on the surface of four squared copper fins of 10 cm per side and 0.314 cm thickness. Three of them were manufactured according to the first three iterations of the Sierpinski carpet fractal. The experiments were carried out for different input power at the base of the fins, 4.7 W, 9.0 W, and 13.7 W. Particle image velocimetry was used to measure the velocity fields and the Schlieren technique to visualize the thermal boundary layer. Results showed that higher the input power, higher the velocity of the hydrod
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Resseguier, Valentin, Erwan Hascoët, and Bertrand Chapron. "Random Ocean Swell-Rays: A Stochastic Framework." In Mathematics of Planet Earth. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18988-3_16.

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AbstractOriginating from distant storms, swell systems radiate across all ocean basins. Far from their sources, emerging surface waves have low steepness characteristics, with very slow amplitude variations. Swell propagation then closely follows principles of geometrical optics, i.e. the eikonal approximation to the wave equation, with a constant wave period along geodesics, when following a wave packet at its group velocity. The phase averaged evolution of quasi-linear wave fields is then dominated by interactions with underlying current and/or topography changes. Comparable to the propagati
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Lauga, Eric. "2. Viscosity." In Fluid Mechanics: A Very Short Introduction. Oxford University Press, 2022. http://dx.doi.org/10.1093/actrade/9780198831006.003.0002.

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‘Viscosity’ begins by examining how fluid motion is quantified using the flow velocity. Since fluids can move in three independent directions of space, the velocity is a three-dimensional vector, with each component measuring the velocity in a particular direction. Because the velocity can take different values at different locations in space, it is called a field. Flow kinematics is about the various ways in which fluids can move. There are three fundamental flow modes: translation, rotation, and extension. Extension is the only flow component that is the true deformation. Invoking the concep
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Conference papers on the topic "Surface velocity field"

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Pots, Bert F. M., Edwin L. J. A. Hendriksen, Han A. M. de Reus, Halimah B. Pit, and Steve J. Paterson. "Field Study of Corrosion Inhibition at Very High Flow Velocity." In CORROSION 2003. NACE International, 2003. https://doi.org/10.5006/c2003-03321.

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Abstract This paper covers the execution of a series of field tests at gas well locations in the Netherlands. The objectives were to determine to what flow velocity the gas production can be increased without jeopardizing the integrity of the surface facilities and to establish the optimum corrosion inhibitor injection rate. In one of the field tests, a 4-inch (0.1-m) test flow loop was constructed in a bypass downstream of a test manifold. The loop was equipped with a number of monitoring techniques including FSM (Field Signature Monitoring), ER (Electrical Resistance) probes, Electrochemical
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Zhang, Jing, Yang Lei, Laurane Charrier, Amaury Dehecq, and Alex S. Gardner. "Validation of the Surface Velocity Field of Mountain Glaciers from Its_Live V2 with in Situ GPS Data." In IGARSS 2024 - 2024 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2024. http://dx.doi.org/10.1109/igarss53475.2024.10642917.

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Douma, Huub, and Matthew Haney. "Surface‐wave inversion for near‐surface shear‐wave velocity estimation at Coronation field." In SEG Technical Program Expanded Abstracts 2011. Society of Exploration Geophysicists, 2011. http://dx.doi.org/10.1190/1.3627466.

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Oliveira, Luiz, and Pablo Andrés Muñoz Rojas. "2D Shape Optimization Based on a NURBS Surface Velocity Field." In 7th International Symposium on Solid Mechanics. ABCM, 2019. http://dx.doi.org/10.26678/abcm.mecsol2019.msl19-0146.

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Zuhui Chen, Xing Zhou, Guojun Zhu, and Shihuan Lin. "Surface recombination/generation velocity in metal-oxide-silicon field-effect transistors." In 2009 IEEE International Conference of Electron Devices and Solid-State Circuits (EDSSC 2009). IEEE, 2009. http://dx.doi.org/10.1109/edssc.2009.5394175.

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Chen, Wei. "The global optimal surface velocity field near shoreline from infrared images." In International Symposium on Photoelectronic Detection and Imaging 2009, edited by Jeffery Puschell, Hai-mei Gong, Yi Cai, Jin Lu, and Jin-dong Fei. SPIE, 2009. http://dx.doi.org/10.1117/12.835869.

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Boiero, D., R. Wisén, M. Maraschini, and L. V. Socco. "Shear Wave Velocity Model from Surface Wave Analysis – A Field Case Example." In 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201401024.

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ZHU, H., R. MAO, C. SU, J. SU, and Y. ZHAO. "RECONSTRUCTION OF PARTICLE VELOCITY FIELD AND SOUND PRESSURE FIELD ON THE SOURCE SURFACE BY JOINTLY UTILIZING PARTIAL SOUND PRESSURE AND NORMAL VELOCITY." In ICSV24 2017. Institute of Acoustics, 2025. https://doi.org/10.25144/24819.

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Greenhalgh, S. A., X. Liu, and B. Zhou. "Velocity and Attenuation Dispersion Relations for the Effective Biot Double Porosity Model: Total Field Formulation." In Near Surface 2010 - 16th EAGE European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.20144902.

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Farokhi, S., A. Nekahi, and M. Farzaneh. "Velocity and electric field of the arc root propagating over an ice surface." In 2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP 2013). IEEE, 2013. http://dx.doi.org/10.1109/ceidp.2013.6748196.

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Reports on the topic "Surface velocity field"

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Ray, Laura, Madeleine Jordan, Steven Arcone, et al. Velocity field in the McMurdo shear zone from annual ground penetrating radar imaging and crevasse matching. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42623.

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The McMurdo shear zone (MSZ) is strip of heavily crevassed ice oriented in the south-north direction and moving northward. Previous airborne surveys revealed a chaotic crevasse structure superimposed on a set of expected crevasse orientations at 45 degrees to the south-north flow (due to shear stress mechanisms). The dynamics that produced this chaotic structure are poorly understood. Our purpose is to present our field methodology and provide field data that will enable validation of models of the MSZ evolution, and here, we present a method for deriving a local velocity field from ground pen
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Ziegler, Nancy, Nicholas Webb, Adrian Chappell, and Sandra LeGrand. Scale invariance of albedo-based wind friction velocity. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40499.

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Obtaining reliable estimates of aerodynamic roughness is necessary to interpret and accurately predict aeolian sediment transport dynamics. However, inherent uncertainties in field measurements and models of surface aerodynamic properties continue to undermine aeolian research, monitoring, and dust modeling. A new relation between aerodynamic shelter and land surface shadow has been established at the wind tunnel scale, enabling the potential for estimates of wind erosion and dust emission to be obtained across scales from albedo data. Here, we compare estimates of wind friction velocity (u*)
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Baumgardner, Davis, and Olsen. PR-179-13205-R01 Field Evaluation of Oxidation Catalyst Degradation - 2-Stroke Lean-Burn NG Engine. Pipeline Research Council International, Inc. (PRCI), 2015. http://dx.doi.org/10.55274/r0010036.

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This study examines the degradation of an exhaust oxidation catalyst on a Cooper-Bessemer GMVH 12C2 gas engine. Critical parameters were determined, such as light-off temperature and reduction efficiency at 450 and 600?F. The catalyst surface was analyzed to examine the location and rate of poison deposition. Catalyst life was examined based on NESHAP guidelines. Catalyst life is strongly dependent on catalyst temperature and space velocity. For similar industrial applications, if the engine unit particulars are known, site operators can use the information in this study to predict when the ox
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Welp, Timothy, Brian Harris, Brian McFall, et al. Development and testing of the Sediment Distribution Pipe (SDP) : a pragmatic tool for wetland nourishment. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48411.

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Standard dredging operations during thin layer placement (TLP) projects are labor intensive as crews are necessary to periodically move the outfall location, which can have lasting adverse effects on the marsh surface. In an effort to increase efficiency during TLP, a novel Sediment Distribution Pipe (SDP) system was investigated. This system offers multiple discharge points along the pipeline to increase the sediment distribution while reducing pipeline movements. An SDP Modeling Application (SDPMA) was developed to assist in the design of SDP field applications by quickly assessing the press
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Bell, Gary, David Abraham, Nathan Clifton, and Lamkin Kenneth. Wabash and Ohio River confluence hydraulic and sediment transport model investigation : a report for US Army Corps of Engineers, Louisville District. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/43441.

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Avulsions of the Wabash River in 2008 through 2011 at its confluence with the Ohio River resulted in significant shoaling in the Ohio River. This caused a re-alignment of the navigation channel and the need for frequent dredging. A two-dimensional numerical hydrodynamic model, Adaptive Hydraulics (AdH), was developed to simulate base (existing) conditions and then altered to simulate multiple alternative scenarios to address these sediment issues. The study was conducted in two phases, Phase 1 in 2013 – 2015 and Phase 2 in 2018 – 2020. Field data were collected and consisted of multi-beam bath
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McKnight, C., David May, and Keaton Jones. Numerical analysis of dike effects on the Mississippi River using a two-dimensional Adaptive Hydraulics model (AdH). Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/46120.

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This report describes the hydraulic effects of dikes on water surface elevation (WSE) and velocities in the Mississippi River near Vicksburg, MS, from Interstate 20 to Highway 80 using a previously calibrated 2D Adaptive Hydraulics numerical model. Dike heights and their associated hydraulic roughness values were varied to quantify the overall effects of adjustments to dike fields. Steady flows characterized as low, medium, and high conditions were simulated. The WSE and velocity difference plots were generated to illustrate the hydraulic effects on the river under all scenarios discussed abov
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Bruce. L51642 Field Nondestructive Examination of ERW Pipe Seams. Pipeline Research Council International, Inc. (PRCI), 1991. http://dx.doi.org/10.55274/r0010587.

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Electric resistance welded (ERW) pipe has been used in the natural gas transmission industry for many years. The Department of Transportation (DOT) has recently expressed interest in the integrity of the weld seam in pipelines made from ERW pipe that was manufactured prior to 1970. Specifically, the DOT has requested that natural gas transmission and hazardous liquid pipeline operators determine whether or not their pipelines that meet this description require hydrostatic proof testing. The initial concern from the DOT was for seam weld selective corrosion, although reference has since been ma
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