Bibliografie tematiche / Kinematic waves

Letteratura scientifica selezionata sul tema "Kinematic waves"

Autore: Grafiati

Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Kinematic waves":

Forristall, George Z. "KINEMATICS IN THE CRESTS OF STORM WAVES". Coastal Engineering Proceedings 1, n. 20 (29 gennaio 1986): 16. http://dx.doi.org/10.9753/icce.v20.16.

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Uncertainty about kinematics in the crests of high waves has prevented random wave simulation from being accepted as a reliable method for computing wave forces for platform design. A theoretically defensible method of calculation for wave crest kinematics has been developed recently. The method produces a potential function which fits the kinematic boundary condition specified by second order wave theory and is thus named the Kinematic Boundary Condition Fitting (KBCF) method. KBCF agreed well with measurements of mechanically generated irregular waves made by a laser Doppler current meter in a wave tank. In order to obtain further data during high, short crested storm waves, instruments for the Fulmar Wave Crest Kinematics (FULWACK) experiment were installed in the North Sea early in November 1981. During a storm later in that month, good velocity measurements at heights up to 25 feet above mean water level were obtained in over 30 waves. For comparison with this data, KBCF was extended to three dimensions. Statistics of the velocities thus simulated agreed well with statistics of the measurements. KBCF has thus been verified as a accurate method for simulating the kinematics of natural storm waves.

Kim, Tae-in, Robert T. Hudspeth e W. Sulisz. "CIRCULATION KINEMATICS IN NONLINEAR LABORATORY WAVES". Coastal Engineering Proceedings 1, n. 20 (29 gennaio 1986): 30. http://dx.doi.org/10.9753/icce.v20.30.

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A weakly nonlinear solution is presented for the two-dimensional wave kinematics forced by a generic wavemaker of variable-draft. The solution is valid for both piston and hinged wavemakers of variable draft that may be double articulated. The second-order propagating waves generated by a planar wave board are composed of two components; viz., a Stokes second-order wave and a second-harmonic wave forced by the wavemaker which travels at a different speed. A previously neglected time-independent solution that is required to satisfy a kinematic boundary condition on the wavemaker as well as a mixed boundary condition on the free surface is included for the first time. A component of the time-independent solution is found to accurately estimate the mean return current (correct to second-order) in a closed wave flume. This mean return current is usually estimated from kinematic considerations by a conservation of mass principle.

Najd, Jamal, Enrico Zappino, Erasmo Carrera, Walid Harizi e Zoheir Aboura. "A Variable Kinematic Multifield Model for the Lamb Wave Propagation Analysis in Smart Panels". Sensors 22, n. 16 (17 agosto 2022): 6168. http://dx.doi.org/10.3390/s22166168.

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The present paper assessed the use of variable kinematic two-dimensional elements in the dynamic analysis of Lamb waves propagation in an isotropic plate with piezo-patches. The multi-field finite element model used in this work was based on the Carrera Unified Formulation which offers a versatile application enabling the model to apply the desired order theory. The used variable kinematic model allowed for the kinematic model to vary in space, thereby providing the possibility to implement a classical plate model in collaboration with a refined kinematic model in selected areas where higher order kinematics are needed. The propagation of the symmetric (S0) and the antisymmetric (A0) fundamental lamb waves in an isotropic strip was considered in both mechanical and piezo-elastic plate models. The convergence of the models was discussed for different kinematics approaches, under different mesh refinement, and under different time steps. The results were compared to the exact solution proposed in the literature in order to assess and further determine the effects of the different parameters used when dynamically modeling a Lamb wave propagating in such material. It was shown that the higher order kinematic models delivered a higher accuracy of the propagating wave evaluated using the corresponding Time Of Flight (TOF). Upon using the appropriate mesh refinement of 2000 elements and sufficient time steps of 4000 steps, the error between the TOF obtained analytically and numerically using a high order kinematics was found to be less than 1% for both types of fundamental Lamb waves S0 and A0. Node-dependent kinematics models were also exploited in wave propagation to decrease the computational cost and to study their effect on the accuracy of the obtained results. The obtained results show, in both the mechanical and the piezo-electric models, that a reduction in the computational cost of up to 50% can be easily attained using such models while maintaining an error inferior to 1%.

Baloga, Stephen. "Lava flows as kinematic waves". Journal of Geophysical Research 92, B9 (1987): 9271. http://dx.doi.org/10.1029/jb092ib09p09271.

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Pak, On Shun, Saverio E. Spagnolie e Eric Lauga. "Hydrodynamics of the double-wave structure of insect spermatozoa flagella". Journal of The Royal Society Interface 9, n. 73 (febbraio 2012): 1908–24. http://dx.doi.org/10.1098/rsif.2011.0841.

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In addition to conventional planar and helical flagellar waves, insect sperm flagella have also been observed to display a double-wave structure characterized by the presence of two superimposed helical waves. In this paper, we present a hydrodynamic investigation of the locomotion of insect spermatozoa exhibiting the double-wave structure, idealized here as superhelical waves. Resolving the hydrodynamic interactions with a non-local slender body theory, we predict the swimming kinematics of these superhelical swimmers based on experimentally collected geometric and kinematic data. Our consideration provides insight into the relative contributions of the major and minor helical waves to swimming; namely, propulsion is owing primarily to the minor wave, with negligible contribution from the major wave. We also explore the dependence of the propulsion speed on geometric and kinematic parameters, revealing counterintuitive results, particularly for the case when the minor and major helical structures are of opposite chirality.

NG, Felix, e Edward C. King. "Kinematic waves in polar firn stratigraphy". Journal of Glaciology 57, n. 206 (2011): 1119–34. http://dx.doi.org/10.3189/002214311798843340.

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AbstractRadar studies of firn on the ice sheets have revealed complex folds on its internal layering that form from the interplay of snow accumulation and ice flow. A mathematical theory for these fold structures is presented, for the case where the radar cross section lies along the ice-flow direction and where the accumulation rate and ice-flow velocity are time-invariant. Our model, which accounts for firn densification, shows how ‘information’ (the depth and slope of isochrones) propagates on the radargram to govern its layer undulations. This leads us to discover universal rules behind the pattern of layer slopes on a distance–age domain and understand why the loci of layer-fold hinges curve, emerge and combine on the radargram to form closed loops that delineate areas of rising and plunging isochrones. We also develop a way of retrieving the accumulation rate distribution and layer ages from steady isochrone patterns. Analysis of a radargram from the onset zone of Bindschadler Ice Stream, West Antarctica, indicates that ice flow and accumulation rates have been steady there for the past ∼400 years, and that spatial anomalies in the latter are coupled to surface topography induced by ice flow over the undulating ice-stream bed. The theory provides new concepts for the morphological interpretation of radargrams.

Arattano, M., e W. Z. Savage. "Modelling debris flows as kinematic waves". Bulletin of the International Association of Engineering Geology 49, n. 1 (aprile 1994): 3–13. http://dx.doi.org/10.1007/bf02594995.

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Tassev, Svetlin V., e Edmund Bertschinger. "Kinematic Density Waves in Accretion Disks". Astrophysical Journal 686, n. 1 (10 ottobre 2008): 423–31. http://dx.doi.org/10.1086/591014.

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Wei, Xing. "Kinematic dynamo induced by helical waves". Geophysical & Astrophysical Fluid Dynamics 109, n. 2 (31 luglio 2014): 159–67. http://dx.doi.org/10.1080/03091929.2014.944517.

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Turner, G. A., e V. S. Vadke. "Kinematic waves in a liquefied paste". Journal of Sound and Vibration 104, n. 3 (febbraio 1986): 483–96. http://dx.doi.org/10.1016/0022-460x(86)90303-2.

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Tesi sul tema "Kinematic waves":

Ni, Daiheng. "Extension and generalization of Newell's simplified theory of kinematic waves". Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-11112004-112805/unrestricted/ni%5Fdaiheng%5F200412%5Fphd.pdf.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2005.
Leonard, John D., Committee Chair ; Goldsman, Dave, Committee Member ; Amekudzi, Adjo, Committee Member ; Hunter, Michael, Committee Member ; Dixon, Karen, Committee Member. Vita. Includes bibliographical references.

Vieth, Kai-Uwe. "Kinematic wavefield attributes in seismic imaging /". [Karlsruhe] : Die Universität, 2001. http://www.ubka.uni-karlsruhe.de/vvv/2001/physik/2/2.pdf.

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Mukhamediyarova, Akerke. "Microbiological Enhanced Oil Recovery : Model of Kinematic Waves and Asymptotic Analysis". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0301.

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L’un des objectifs stratégiques de l’industrie pétrolière moderne est le développement réserve effective de pétrole à haute viscosité, caractérisées par une faible mobilité entraînant une forte baisse du facteur de récupération du pétrole. Le développement de tels réservoirs par des méthodes traditionnelles (déplétion naturelle, injection d’eau, etc.) n’est souvent pas efficace. L’alternative est une application de méthodes de récupération actives, en d’autres termes, des méthodes de récupération assistée du pétrole. Dans cette thèse, nous analysons les problèmes de modélisation du déplacement du pétrole par l’eau en présence de bactéries produisant des agents chimiques actifs qui changent favorablement les propriétés du pétrole et de l’eau. Plus strictement, nous analysons les bactéries produisant un biosurfactant qui réduit les effets négatifs du piégeage d’huile capillaire en milieux poreux. Un tel problème fait partie de la théorie générale de l’écoulement multiphase multicomposant partiellement miscible avec des réactions chimiques, couplé à la dynamique de la population. Le modèle mathématique général du processus est présenté, qui a été réduit au modèle des ondes cinématiques, grâce à plusieurs simplifications admissibles. Plus exactement, nous avons obtenu le système de cinq équations différentielles en dérivées partielles non linéaires du premier ordre, qui peuvent avoir des solutions discontinues. Un tel système ne peut être étudié que numériquement dans le cas général. Cependant, nous avons montré que pour un cas particulier, ce modèle peut être complètement analysé qualitativement. Pour une telle analyse, nous avons introduit le concept de faible bioréactivité. Elle correspond au comportement asymptotique du modèle général lorsque le taux de cinétique bactérienne tend vers zéro. En appliquant la technique de développement asymptotique, nous avons obtenu la solution semi-analytique du problème de déplacement. En particulier, cela nous a oﬀert la possibilité de détecter les discontinuités (les chocs) de diﬀérents types et d’analyser exactement leur structure. Le cas général du taux cinétique arbitraire a été étudié numériquement, en utilisant le code COMSOL MULTIPHYSICS. Nous avons analysé l’impact du taux de croissance microbien, des concentrations microbiennes et nutritives, de la forme des fonctions cinétiques et du rapport de viscosité sur la récupération de l’huile. Dans le dernier chapitre, nous avons simulé un cas réel d’un champ pétrolier kazakh. Le principal et unique outil d’étude de la récupération microbiologique assistée du pétrole (RAMP) était l’analyse numérique, alors qu’il manquait des solutions analytiques. Les solutions semi-analytiques que nous avons obtenues comblent cette lacune. Ils représentent des résultats exacts qui pourraient être utilisés pour vériﬁer la validité de divers schémas et codes numériques
One of the strategic objectives of the modern oil industry is the efficient development of high-viscosity oil reserves, which are characterized by low mobility leading to a sharp decline in the oil recovery factor. The development of such reservoirs by traditional methods (natural drives, waterflooding etc.) is frequently not efficient. The alternative is an application of active recovery methods, in other words, enhanced oil recovery methods. In this thesis we analyze the problems of modelling the displacement of oil by water in presence of bacteria producing some active chemicals that change favorably the properties of oil and water. More strictly, we analyze the bacteria producing biosurfactant that reduces the negative effects of capillary oil trapping in porous media. Such a problem makes part of the general theory of multiphase multicomponent partially miscible flow with chemical reactions, coupled with the dynamics of population. The general mathematical model of the process is presented, which is reduced next to the model of kinematic waves, due to several admissible simplifications. More exactly, we have obtained the system of five nonlinear partial differential equations of the first order, which can have discontinuous solutions. Such a system can be studied only numerically in the general case. However, we have shown that for a particular case this model can be completely analyzed qualitatively. For such an analysis, we have introduced the concept of weak bioreactivity. It corresponds to the asymptotic behavior of the general model as the rate of bacterial kinetics tends to zero. Applying the technique of asymptotic expansions, we have obtained the semi-analytical solution to the displacement problem. In particular, this offered us the possibility to detect the discontinuities (chocks) of various types and to analyze exactly their structure. The general case of arbitrary kinetic rate was studied numerically, by using the code COMSOL MULTIPHYSICS. We analyzed the impact of the microbial growth rate, microbial and nutrient concentrations, the form of kinetic functions and the viscosity ratio on the oil recovery. In the last chapter, we simulated a field case for a Kazakhstani oil field. The main and unique tool of studying MEOR was the numerical analysis, whilst analytical solutions were missing. The semi-analytical solutions we have obtained fill this gap. They represent exact results that could be used to check the validity of various numerical schemes and codes

Gomes, Vanessa Ueta. "Comparative studies between the kinematic and diffusive waves on the flood routing analisys, in function of hydraulics parameters of the watershed". Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=242.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico
Os Modelos da Onda CinemÃtica e da Onda Difusiva foram aplicados em um rio natural, para estudar a propagaÃÃo de uma onda de cheia neste corpo hÃdrico. Esses modelos sÃo derivaÃÃes do Modelo da Onda DinÃmica, a partir de simplificaÃÃes nas EquaÃÃes de Saint Venant, onde alguns termos sÃo desprezados. No processo de soluÃÃo das equaÃÃes diferenciais, pertinentes aos modelos, foi usado o MÃtodo das DiferenÃas Finitas, sendo que o esquema de aproximaÃÃo explicita foi aplicado para a onda cinemÃtica, enquanto que o esquema de aproximaÃÃo implÃcita foi aplicado para a onda difusiva. Para esta pesquisa, um programa computacional, em linguagem FORTRAN, foi desenvolvido e permitiu que viÃrias simulaÃÃes fossem realizadas, para diferentes cenÃrios encontrados nos rios naturais. Estudos para verificar a sensibilidade dos modelos, com respeito aos parÃmetros hidrÃulicos da bacia, foram realizados. TambÃm foi verificada a influÃncia da linearizaÃÃo das equaÃÃes diferenciais, que compÃem os modelos, nÃs cÃlculos das variÃveis de controle. Os resultados mostraram que o modelo da onda cinemÃtica Ã mais sensÃvel ao coeficiente de rugosidade das paredes do canal, enquanto que o modelo da onda difusiva Ã mais sensÃvel para parÃmetros da declividade de fundo do canal, onde este parÃmetro atua diretamente no processo de amortecimento da onda em propagaÃÃo. Os resultados mostraram ainda que, para os cenÃrios usados nas simulaÃÃes, o processo de linearizaÃÃo das equaÃÃes diferenciais nÃo afeta, consideravelmente, a soluÃÃo dos modelos.

Athanasiou, Evangelia. "Response on reinforced concrete structural elements to ballistic impact and contact detonations". Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31287.

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Concrete is a widely studied material with a composite nature. It is used both in civil and military buildings and infrastructures. An issue of great importance is the protection of people from terrorist attacks that target critical infrastructure. Explosions, detonations and/or projectile impacts are some of the most severe actions a concrete structure can face. Experimental analysis is necessary in order to understand and predict the response of a structure to such dynamic and strain rate sensitive conditions. However, as the cost of performing experiments is significant and numerical simulations offer improved blast and impact analysis capabilities, there is an effort to limit experiments to validation purposes. In recent years, many researchers have studied the impact loads transferred to reinforced concrete (RC) structures both through direct projectile impacts or blast waves at both near and far field. The aim of the current study is twofold. First, to investigate contact detonations on this type of material (RC), since literature can provide us with limited information. Secondly, to assess the behaviour of the RC structure under combined ballistic impact and contact detonation of a very specific geometry of projectile (HESH) that exists currently on the market and behaves differently from the normal projectiles that consist of one single material. The author analysed and discussed in depth the response of RC members exposed to contact detonations. More precisely, the effect of the mass of explosive (C4) on pressures, impulses and energy balances. Also, she investigated the kinematic response of RC slabs and the structural role of the reinforcing bars. The driving force of this RC structures. Currently, the majority of studies regarding contact blast are focusing either on innovative types of concrete or normal concrete. However, normal concrete is investigated as a control parameter (to prove the effective resistance of the innovative material) rather than a detailed study on the behaviour of the material. Thereafter, the author analysed the response of a RC wall under the combined effect of kinetic energy (terminal ballistics) and contact detonation caused by the impact of a 90 mm HESH (High Explosive Squash Head) projectile fired from a distance of 70 m. The aim was to investigate the response of the structural member under the superposition of those two actions and analyse the combined effects of the impact velocity and detonation on the response of the structure. The numerical modelling is based on a Multi-Material-Arbitrary-Lagrangian-Eulerian approach (MMALE, using LS-DYNA) using the Winfrith concrete constitutive material model to investigate the dynamic response of the RC members under high strain rate conditions. The efficiency of the proposed numerical modelling is validated with experimental results - based on open-arena testing - and provided by the Royal Military Academy of Belgium. Some of the key findings of this research are that the increase of the amount of the explosive affects the damage failure of the RC members from flexural failure to shear failure. In addition, fitting curves that could be used in design, were proposed, that show the relation between the mass of explosive and the resulting pressures and impulses, within the tested range. In the case of the combined blast and impact scenario, the detonation was found to dominate the structural response of the RC slab.

Abreu, Manuel P. "Kinematics under wind waves". Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27115.

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Lader, Pål Furset. "Geometry and Kinematics of Breaking Waves". Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-69.

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The objective of this thesis is to experimentally study different breaking waves cases. This is done by measuring in detail the free surface geometry and the internal kinematics of the waves as they approach breaking. Three principal wave cases were chosen for the study: A plunging breaker, a spilling breaker, and an intermediate breaker.

A major part of this work is the design, construction and building of a wave laboratory. The laboratory contains a glass wall waveflume which is 13.5m long, 1m deep and 0.6m wide, as well as equipment for measuring both the wave kinematics and geometry optically. The wave kinematics is measured using the Particle Image Velocimetry (PIV) method, while the wave profile geometry is measured using image analysis (space domain geometry), as well as standard wave gauges (time domain geometry).

The analysis of both the wave kinematics and geometry is done using parameters describing quantitatively important features in the wave evolution. The surface geometry is described using the commonly known zero-downcross parameters, and in addition, new parameters are suggested and used in the study, The kinematics are described by a set of four parameters suggested for the first time in this work. These parameters are: Velocity at the surface, velocity at the still water line (z = 0), mean velocity direction, and local wave number. The purpose of these parameters is to give a better understanding of the space and time domain development of the kinematics, and they appear to be a reasonable compromise between simplicity and accuracy.

The results presented here represents a thorough and detailed mapping of the breaking process. Much data is gathered and analysed, and throughout this thesis it is sought to present the data in the most intuitive way, so that other investigations may benefit from it.

Constantian, Richard K. "Observed kinematics of waves in the surf zone". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA361813.

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Thesis (M.S. in Physical Oceanography) Naval Postgraduate School, March 1999.
"March 1999". Thesis advisor(s): T.H.C. Herbers. Includes bibliographical references (p. 41-42). Also available online.

Jin, Wenlong. "Kinematic wave models of network vehicular traffic /". For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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Kleiss, Jessica M. "Airborne observations of the kinematics and statistics of breaking waves". Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3359574.

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Thesis (Ph. D.)--University of California, San Diego, 2009.
Title from first page of PDF file (viewed July 22, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 181-190).

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Libri sul tema "Kinematic waves":

P, Singh V. Kinematic wave modeling in water resources: Environmental hydrology. New York: Wiley, 1997.

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P, Singh V. Kinematic wave modeling in water resources: Surface-water hydrology. New York: Wiley, 1996.

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Abreu, Manuel P. Kinematics under wind waves. Monterey, Calif: Naval Postgraduate School, 1989.

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Barker, Christopher H. Directional irregular wave kinematics. Vicksburg, Miss: U.S. Army Engineer Waterways Experiment Station, 1998.

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1933-, Tørum A., Gudmestad O. T. 1947- e NATO Advanced Research Workshop on Water Wave Kinematics (1989 : Molde, Norway), a cura di. Water wave kinematics. Dordrecht [Holland]: Kluwer Academic Publishers, 1990.

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Tørum, A., e O. T. Gudmestad, a cura di. Water Wave Kinematics. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0531-3.

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Tørum, A. Water Wave Kinematics. Dordrecht: Springer Netherlands, 1990.

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Wong, Tommy S. W. Kinematic-wave rainfall-runoff formulas. Hauppauge, NY: Nova Science Publishers, 2009.

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Arattano, M. Kinematic wave theory for debris flow. Denver, Co: U.S. Geological Survey, 1992.

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Z, Savage William, e Geological Survey (U.S.), a cura di. Kinematic wave theory for debris flow. Denver, Co: U.S. Geological Survey, 1992.

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Capitoli di libri sul tema "Kinematic waves":

Vreugdenhil, Cornelis B. "Kinematic Waves". In Computational Hydraulics, 30–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-95578-5_6.

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Pedlosky, Joseph. "Kinematic Generalization". In Waves in the Ocean and Atmosphere, 9–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05131-3_2.

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Guerrieri, Marco, e Raffaele Mauro. "Continuity Flow Equation, Kinematic Waves and Shock Waves". In Springer Tracts in Civil Engineering, 49–64. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60723-4_3.

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Uhlmann, Gunther. "The Inverse Kinematic Problem in Anisotropic Media". In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003, 39–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_6.

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Wang, Gwo-Ching, e Toh-Ming Lu. "Kinematic Scattering of Waves and Diffraction Conditions". In RHEED Transmission Mode and Pole Figures, 23–39. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-9287-0_3.

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Debnath, Lokenath. "Kinematic Waves and Real-World Nonlinear Problems". In Nonlinear Partial Differential Equations for Scientists and Engineers, 283–354. Boston: Birkhäuser Boston, 2012. http://dx.doi.org/10.1007/978-0-8176-8265-1_6.

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Boure, J. A. "Properties of Kinematic Waves in Two-Phase Pipe Flows". In Adiabatic Waves in Liquid-Vapor Systems, 207–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-83587-2_18.

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Debnath, Lokenath. "Kinematic Waves and Specific Real-World Nonlinear Problems". In Nonlinear Partial Differential Equations for Scientists and Engineers, 185–262. Boston, MA: Birkhäuser Boston, 1997. http://dx.doi.org/10.1007/978-1-4899-2846-7_6.

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Bujakas, V. I. "Kinematic Waves in Linear Statically Determinate Adjustable Structures". In New Trends in Mechanism and Machine Science, 13–22. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4902-3_2.

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Ponce, V. M. "Modeling Surface Runoff with Kinematic, Diffusion, and Dynamic Waves". In Water Science and Technology Library, 121–32. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-0389-3_10.

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Atti di convegni sul tema "Kinematic waves":

Smith, Susan, e Christopher Swan. "Kinematic Predictions in Large Shallow Water Waves". In 25th International Conference on Coastal Engineering. New York, NY: American Society of Civil Engineers, 1997. http://dx.doi.org/10.1061/9780784402429.040.

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Bouscasse, Benjamin, Guillaume Ducrozet, Jang Whan Kim, Hojoon Lim, Young Myung Choi, Arne Bockman, Csaba Pakozdi, Eloïse Croonenborghs e Hans Bihs. "Development of a Protocol to Couple Wave and CFD Solvers Towards Reproducible CFD Modeling Practices for Offshore Applications". In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19188.

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Abstract Generating waves inside the CFD domain is a topic of interest in the offshore and naval industry. For practical reasons it is useful to use a potential wave kinematic solver (PWKS) to generate incident waves and use this solution to initialize and propagate incident waves in the CFD solver. Protocols to transfer the wave data from PWKS to CFD solver have been developed to ensure the reproduction of the wave kinematics from a PWKS in CFD solvers. Based on the survey results from a number of PWKS and CFD solvers available, the paper presents the various ways to express the solution and what is needed to reconstruct the fields needed in the CFD.

Ramachandran, Jayram, e Jian Zhang. "Kinematic Response of Nonlinear Pile under Vertical Shear Waves". In Structures Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40753(171)98.

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Rezzag, Taha, Robert Burke e Kareem Ahmed. "A Kinematic Study of Individual Rotating Detonation Engine Waves Using K-means Algorithm". In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58814.

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Abstract The current research is concerned with studying the instantaneous properties of the detonation waves in a RDRE by tracking each individual wave and recording its position, velocity, and peak intensity as it travels around the annulus. This information is retrieved by a non-intrusive method consisting of using a data mining technique, the k-means algorithm, to distinguish each detonation from each other in a particular frame. An algorithm was then developed to match the detonations of a current frame to the ones of a previous frame. The code was validated against results found from the back-end imaging method developed by the Air Force Research Laboratory with excellent agreement. Results for two and three-wave mode cases show that the instantaneous detonation wave speeds oscillate around the mode locked average wave speed computed from a detonation surface. Moreover, the investigation of the relationship of the detonation’s peak light intensity with the azimuthal position revealed to also be oscillatory but more distinct.

Mansouri, Mahshid, Girish Krishnan e Elizabeth T. Hsiao-Wecksler. "Design Guidelines for Moving a Human Body on a Bed Using Traveling Waves". In 2022 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/dmd2022-1071.

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Abstract Inspired by natural waves such as water waves that can carry objects, this study presents design guidelines for moving a human body using traveling waves created on the surface of a bed. Particularly, through kinematic analysis and simulation of a traveling wave, the study explores various parameters, such as the wave’s frequency, wavelength, amplitude, number of wave-generating actuators and their movement pattern under the body. The study also investigates how these parameters affect human transportation speed and movement smoothness. The study results suggest that transportation speed is linearly proportional to the wave frequency. Additionally, to increase movement smoothness, the wave amplitude should be reduced while the number of actuators should be maximized. However, there is a tradeoff between the number of actuators that can be used and the complexity of the system’s design and control.

Lubis, Michael Binsar, Sverre Haver e Jørgen Amdahl. "Time Domain Simulation of Jack-Up Platform in Second-Order Irregular Seas". In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61463.

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This paper reviews the significance of applying second-order irregular waves for assessing hydrodynamic loads on a jack-up platform. The study is based on a realistic jack-up model. The wave load is determined utilizing Morison equation. The study focuses on extreme wave elevations when the drag load component dominates and the magnitude of wave particle horizontal velocity is crucial. Both extreme surface elevation and wave particle kinematics are observed. For wave particle kinematic, two different stretching methods are compared. The static response of a pile structure using the second-order model and the 5th Stokes wave are compared. In the end, a dynamic analysis of the jack-up utilizing a second-order irregular wave model is performed.

He, Yuchen, Taiga Kanehira, Nobuhito Mori, Muhannad Gamaleldin, Alexander Babanin, Kapil Chauhan e Amin Chabchoub. "Nonlinear and Extreme Wave Group Interactions With a Circular Cylinder". In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-104739.

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Abstract The evaluation of extreme wave kinematics is decisive to determine design standards for marine structures. Offshore rogue waves in high wind areas can emerge as a consequence of unstable wave group focusing. Large-amplitude waves in such wave groups have different kinematic properties compared to those resulting from the superposition principle. This experimental study has been carried out to evaluate the wave load forces of highest amplitudes within unstable wave groups acting on a submerged, vertical, and circular cylinder. Different wave steepness parameters have been systematically adopted. It is shown that for moderate steepness values the wave loads show the presence of three harmonic components. Higher wave steepness parameters are responsible for the change of the cylinder’s response in the form of a transient ringing. In fact, even though higher harmonics of the underlying regular wave trains do not resonate with the lowest resonant frequency of the cylinder, the severe broadening of the wave spectra in all bound wave components, resulting from the wave focusing within the unstable wave packet, triggers a ringing frequency excitation.

Liang, Gangtao, Haibing Yu, Liuzhu Chen e Shengqiang Shen. "Interaction of Impact Liquid Drop With Splat in Spray Cooling". In ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-3908.

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Abstract This study investigates the interaction between an impacting liquid drop and a splat generated on a solid prior to impact, focusing mainly on the wave production and propagation on the splat with low impact velocity. Using high-speed video, the wave generation concerning the effects of Weber number is observed and analyzed, including the first wave caused by drop kinematic energy, the secondary and tertiary capillary waves subjected to surface tension. Also, the wave propagation magnitude is discussed, the purpose of which is to provide a suitable method for predicting the wave diameter. Results show that the increasing of Weber number is slightly against the wave propagation, but this effect weakens gradually. The kinematic discontinuity theory devised for crown propagation can be applied to predict the wave propagation magnitude with an excellent agreement, for both the kinematic wave and the capillary wave. In addition, the propagation speed of the wave during the drop-splat interaction is also analyzed.

Hess, Isabel, e Patrick Musgrave. "The Role of Compliance in Generating Traveling Waves on a Bio-Inspired Flexible Propulsor". In ASME 2022 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/smasis2022-88529.

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Abstract Body and caudal fin fish, like tuna and eels, are classified on a scale of kinematic modes from thuuniform to anguilliform. What differentiates the thuuniform and anguilliform motion is the relative dominance of standing and traveling waves in their body’s deformation. The anguilliform swimming mode, where a traveling wave is propagated along the body length, is desirable for certain applications of bio-inspired underwater vehicles because of its low-speed efficiency and high maneuverability. In nature, anguilli form swimmers are more flexible and slender than thuuniform fishes. The aim of this paper is to study the relationship between body flexibility, fluid damping, and induced swimming kinematics in a bio-inspired propulsor. A nonlinear electro-hydro-elastic model was derived and a parametric study was conducted over different body stiffness. To find the relative strength of standing and traveling waves in the body deformation the steady-state response was analyzed using orthogonal decomposition. Traveling wave quality was dependent on excitation frequency and the presence of nonlinear fluid damping. A peak in traveling wave quality was induced at the natural frequencies due to significant nonlinear fluid loading. At the first couple natural frequencies, flexible beams had greater overall traveling wave quality, but stiffer beams exhibited a stronger nonlinear response. While future work is needed to examine the high frequency response of flexible structures, the frequency band which maximizes traveling wave quality may identify an optimal regime for passively flexible bio-inspired propulsors.

Roukema, Jochem C., e Yusuf Altintas. "Kinematic Model of Dynamic Drilling Process". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59340.

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A mathematical model of the torsional-axial chatter vibrations in drilling is presented. The model considers the exact kinematics of both rigid body, and coupled torsional and axial vibrations of the drill. The drill is modeled as a pretwisted beam that exhibits axial deflections due to torque and thrust loading. A mechanistic cutting force model is used to model the cutting torque and thrust as a function of feedrate, speed, radial depth of cut, and drill geometry. The drill rotates and feeds axially into the workpiece while the structural vibrations are excited by the cutting torque and thrust force. The exact location of the drill edge is predicted using the model, and the generated surface is digitized at discrete time intervals. The distribution of chip thickness, which is affected by both rigid body motion and structural vibrations, is evaluated by subtracting the presently generated surface from the previous one. The model considers nonlinearities in cutting coefficients, tool jumping out of cut and overlapping of multiple regeneration waves. The dynamic chip thickness obtained from the true kinematics model allows simultaneous prediction of force, torque, power and dimensional form errors left on the surface. The time domain simulation model allows prediction of stability lobes. The paper provides details of the mathematical model, supported by experimental results of both stable and unstable cuts.

Rapporti di organizzazioni sul tema "Kinematic waves":

Horlings, Brita. The Nature of Kinematic Waves in Glaciers and Their Application to Understanding the Nisqually Glacier, Mt. Rainier, Washington. Portland State University Library, gennaio 2016. http://dx.doi.org/10.15760/honors.308.

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Barker, Christopher H., e Rodney J. Sobey. Directional Irregular Wave Kinematics. Fort Belvoir, VA: Defense Technical Information Center, settembre 1998. http://dx.doi.org/10.21236/ada353762.

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Abdolmaleki, Kourosh. PR453-205101-R01 Prediction of On-bottom Wave Kinematics in Shallow Water. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), maggio 2022. http://dx.doi.org/10.55274/r0012225.

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This report examines a novel methodology for approximate prediction of the on-bottom kinematics in shallow waters and shore approach regions. The method involves simulation of generic shallow water scenarios in the Danish Hydraulic Institute MIKE software by assuming a range of seabed slopes and sea states. The simulation results are compiled in a database and a machine learning model is fitted for fast extraction of the desired surface or bottom data. The outcome of this scope of work is very useful when a pipeline stability assessment is required in shallow water areas, where no site-specific met-ocean engineering data is available. In the future, this database could be expanded to cover more ranges of input data and be implemented in the PRCI On-Bottom Stability software.

Conery, Ian, Brittany Bruder, Connor Geis, Jessamin Straub, Nicholas Spore e Katherine Brodie. Applicability of CoastSnap, a crowd-sourced coastal monitoring approach for US Army Corps of Engineers district use. Engineer Research and Development Center (U.S.), settembre 2023. http://dx.doi.org/10.21079/11681/47568.

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This US Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory, technical report details the pilot deployment, accuracy evaluation, and best practices of the citizen-science, coastal-image monitoring program CoastSnap. Despite the need for regular observational data, many coastlines are monitored infrequently due to cost and personnel, and this cell phone-image-based approach represents a new potential data source to districts in addition to providing an outreach opportunity for the public. Requiring minimal hardware and signage, the system is simple to install but requires user-image processing. Analysis shows the CoastSnap-derived shorelines compare well to real-time kinematic and lidar-derived shorelines during low-to-moderate wave conditions (root mean square errors [RMSEs] <10 m). During high-wave conditions, errors are higher (RMSE up to 18 m) but are improved when incorporating wave run-up. Beyond shoreline quantification, images provide other qualitative information such as storm-impact characteristics and timing of the formation of beach scarps. Ultimately, the citizen-science tool is a viable low-cost option to districts for monitoring shorelines and tracking the evolution of coastal projects such as beach nourishments.

Bak, A. Spicer, Patrick Durkin, Brittany Bruder, Matthew Saenz, Michael Forte e Katherine Brodie. Amphibious uncrewed ground vehicle for coastal surfzone survey. Engineer Research and Development Center (U.S.), gennaio 2024. http://dx.doi.org/10.21079/11681/48130.

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The capability of a commercial off-the-shelf amphibious bottom crawling robot is explored for surveying seamless topography and bathymetry across the beachface, surfzone, and very nearshore. A real-time-kinematic (RTK) antenna on a mast was added to the robotic platform, a Bayonet-350 (previously the C2i SeaOx). Data collected from the robot were compared with those collected by the Coastal Research Amphibious Buggy (CRAB) and the Lighter Amphibious Resupply Cargo (LARC), unique amphibious vessels capable of collecting seamless topography and bathymetry in use for decades at the US Army Engineer Research and Development Center’s Field Research Facility (FRF). Data were compared on five different days in a range of wave conditions (Hs < 1 m in 8-m depth) resulting in a root-mean square difference of 8.7 cm and bias of 2 cm for 24 different cross-shore profile comparisons. Additionally, a repeatability test was performed to assess measurement uncertainty. The repeatability test indicated a total vertical uncertainty (TVU) of 5.8 cm, with the highest spatial error at the shoreline.