Готові списки джерел за темами / Rotating cone

Добірка наукової літератури з теми "Rotating cone"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Rotating cone"

1

Kenyon, Kern E. "Cone Rotating in a Fluid." Natural Science 12, no. 01 (2020): 1–3. http://dx.doi.org/10.4236/ns.2020.121001.

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2

Bataineh, Khaled M., and Yazan Taamneh. "Novel rotating cone viscous micro pump." International Journal of Engineering Systems Modelling and Simulation 5, no. 4 (2013): 188. http://dx.doi.org/10.1504/ijesms.2013.056770.

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3

Beunder, E. M., K. A. van Olst, and P. C. Rem. "Shape separation on a rotating cone." International Journal of Mineral Processing 67, no. 1-4 (November 2002): 145–60. http://dx.doi.org/10.1016/s0301-7516(02)00036-4.

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4

Rewatkar, V. B., and J. H. Masliyah. "Hardwood fibre fractionation using rotating cone." Canadian Journal of Chemical Engineering 75, no. 1 (February 1997): 196–204. http://dx.doi.org/10.1002/cjce.5450750128.

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5

Afshar, A. F. S., D. R. Gabe, and B. Sewell. "Mass transfer at rotating cone electrodes." Journal of Applied Electrochemistry 21, no. 1 (January 1991): 32–39. http://dx.doi.org/10.1007/bf01103826.

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6

Nadeem, S., and S. Saleem. "Analytical Study of Rotating Non-Newtonian Nanofluid on a Rotating Cone." Journal of Thermophysics and Heat Transfer 28, no. 2 (April 2014): 295–302. http://dx.doi.org/10.2514/1.t4145.

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7

Roy, S., H. S. Takhar, and G. Nath. "Unsteady MHD Flow on a Rotating Cone in a Rotating Fluid." Meccanica 39, no. 3 (June 2004): 271–83. http://dx.doi.org/10.1023/b:mecc.0000022847.28148.98.

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8

Zheng, Ming Hui, Cong Ling Zhu, and Ji Bin Jiang. "Kinetics Analysis and Optimal Design Method Explore on Rotating Cone Reactor Based on Dynamics Theory and Modern Simulation Technology." Advanced Materials Research 538-541 (June 2012): 2781–83. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2781.

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In this paper, design problems on rotating cone reactor have been studied and dynamics problems have been analyzed in detail, kinematics differential equation of mixture in rotating cone reactor and simulation model has been established. Rotating cone reactor prototype which was established preliminarily has been optimized with simulation software. Dynamics analysis and simulation is of great significance in raising the efficiency of BIO-FUEL-OIL flash pyrolysis rotating cone reactor, control production process reliably, and even optimizing design value and physical dimension which is reasonable in design and reducing the cost of product development process.
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9

Kenyon, Kern E. "A Cone Rotating in a Fluid Translates." Natural Science 12, no. 03 (2020): 39–41. http://dx.doi.org/10.4236/ns.2020.123007.

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10

Janssen, L. J. J. "Mass transfer at rotating ring-cone electrodes." Journal of Applied Electrochemistry 22, no. 11 (November 1992): 1091–94. http://dx.doi.org/10.1007/bf01029591.

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Дисертації з теми "Rotating cone"

1

Tham, K. M. "Flow and heat transfer in a H.P. compressor drive cone cavity." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270356.

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2

Chen, Shufei. "Markerless Lung Tumor Trajectory Estimation from Rotating Cone Beam Computed Tomography Projections." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4439.

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Respiration introduces large tumor motion in the thoracic region which influences treatment outcome for lung cancer patients. Tumor motion management techniques require characterization of temporal tumor motions because tumor motion varies patient to patient, day to day and cycle to cycle. This work develops a markerless algorithm to estimate 3 dimensional (3D) lung-tumor trajectories on free breathing cone beam computed tomography (CBCT) projections, which are 2 dimensional (2D) sequential images rotating about an axis and are used to reconstruct 3D CBCT images. A gold standard tumor trajectory is required to guide the algorithm development and estimate the tumor detection accuracy for markerless tracking algorithms. However, a sufficient strategy to validate markerless tracking algorithms is lacking. A validation framework is developed based on fiducial markers. Markers are segmented and marker trajectories are xiv obtained. The displacement of the tumor to the marker is calculated and added to the segmented marker trajectory to generate reference tumor trajectory. Markerless tumor trajectory estimation (MLTM) algorithm is developed and improved to acquire tumor trajectory with clinical acceptable accuracy for locally advanced lung tumors. The development is separate into two parts. The first part considers none tumor deformation. It investigates shape and appearance of the template, moreover, a constraint method is introduced to narrow down the template matching searching region for more precise matching results. The second part is to accommodate tumor deformation near the end of the treatment. The accuracy of MLTM is calculated and compared against 4D CBCT, which is the current standard of care. In summary, a validation framework based on fiducial markers is successfully built. MLTM is successfully developed with or without the consideration of tumor deformation with promising accuracy. MLTM outperforms 4D CBCT in temporal tumor trajectory estimation.
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3

May, Nicholas Edward. "Prediction of the flow and heat transfer between a rotating and a stationary cone." Thesis, University of Plymouth, 1990. http://hdl.handle.net/10026.1/1276.

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This thesis is concerned with the development of a theoretical method for predicting the turbulent flow and heat transfer in the cavity between a rotating and a stationary cone. The motivation for the work stems from the need, in the design process for the gas turbine aero-engine, for a fast and reliable predictive method for such flows. The method developed here is the integral method, which reduces the governing partial differential equations to ordinary differential equations. A number of solution methods for these equations are described, and the optimum in terms of speed and accuracy is indicated. Predicted moment coefficients compare well with experimental data. For half-cone angles greater than approximately 60° but poorly for half cone angle less than approximately 45°. The poor agreement for small cone angles is thought to be due to the presence of Taylor-type vortices, which cannot be incorporated into the integral method. Heat transfer is incorporated into the method using the Reynolds analogy. Due to the lack of experimental data, heat transfer predictions are compared with those from a finite difference program and show encouraging agreement. A computer program which solves the full Reynolds-averaged Navier-Stokes and energy equations in steady and axisymmetric form, using a finite-difference method is modified for use in the conical geometry. Comparison of the predicted moment coefficients with experimental data shows no marked improvement over the integral method. Examination of the secondary flow predicted by the program shows it to be similar to that of the integral method. The failure of the program to predict Taylor-type vortices may be attributed to the fact that they are non-axisymmetric and/or unsteady. The assumptions underlying the Integral method are investigated via the finite difference program and it is concluded that they are valid for half cone angles as small as 15°. Based on the results of the finite difference program, the Integral method is modified to allow for a rectangular outer shroud, and a new model for the stator is described. It is concluded that both the integral method and the finite difference program can be used safely in rotor-stator systems where the half cone angle is greater than about 60°.
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4

Telford, Rosie. "Three dimensional simulations of rotating core collapse supernovae." Thesis, University of Leicester, 2005. http://hdl.handle.net/2381/30693.

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A core collapse supernova is the dramatic death of a massive star by core implosion and subsequent explosion. Massive stars are known to rotate appreciably, yet the vast majority of supernova simulations over the years have not included rotation or its effects.;It is thought that moderate stellar rotation could assist the supernova explosion by lowering the effective gravitational potential in the core. More rapid rotation could give rise to jets and/or bipolar explosions. At the most extreme rotation rates it is thought that gamma ray bursts (GRB) are produced. These bursts may be delayed or revived at late times as a result of the collapsing core becoming rotationally unstable and fragmenting.;In this thesis the effects of rotation on core collapse are studied. Sophisticated progenitor models with rotation rates of up to a significant fraction of Keplerian are used as the starting points for three dimensional simulations. The computational method of Smoothed Particle Hydrodynamics is used to follow the collapse until core "bounce", the point at which the collapse is halted.;It is shown that, before bounce, no instabilities occur even for the most rapid rotators. The maximum value obtained for the ratio of rotational to gravitational binding energy is around 0.13, just below the limit of 0.14 required for instability on a secular timescale. However, the more rapidly rotating models obtain interesting structures as they collapse. In these models the density distribution remains centrally peaked but is surrounded by a torus of centrifugally supported material, consistent with the collapsar model of GRB.;The gravitational wave signals emitted in collapse are also calculated. It is found that these are strongest for the slowly rotating models, in which the collapse is not slowed significantly. A supernova of this type in the Virgo galaxy cluster would be beyond the range of the current generation of gravitational wave detectors.
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5

Coffey, Paul Anthony. "The influence of topography upon rotating magnetoconvection." Thesis, University of Newcastle Upon Tyne, 1996. http://hdl.handle.net/10443/1572.

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Aspects of thermal convection in the Earth's fluid core in the presence of a strong azimuthal magnetic field may be understood by considering a horizontal plane layer, rotating about the vertical z axis, with gravity acting downwards and containing an applied magnetic field aligned in the y (azimuthal) direction. Since the OMB is not smooth, the effects of adding bumps (with axes perpendicular to the applied magnetic field) to the top boundary of the layer are investigated in the magnetogeostrophic limit. The arbitrary geostrophic flow that arises under this limit is evaluated using a modified Taylor constraint. The bumps distort the isotherms so that they are not aligned with equipotential surfaces, leading to an imperfect configuration. This means that a hydrostatic balance is not possible, and motion ensues. This motion takes the form of a steady transverse convection roll, with axis parallel to the bumps. The roll exists for all values of the Rayleigh number, except that value for which the corresponding homogeneous problem in the standard plane layer has a solution. The roll obeys Taylor's constraint, and has no associated geostrophic flow. The stability of this roll to perturbation by oblique rolls (which are preferred for 0(1) values of the Elsasser number) is considered. It is found that the most unstable linear mode consists of a pair of these oblique rolls, aligned so that no geostrophic flow is accelerated by their interaction with the basic state. Hence, the stability results obtained here are identical to those found by perturbing the hydrostatic conduction solution with oblique rolls in the standard layer. Finally, the nonlinear evolution through the Ekman regime of these linear instabilities is considered. It is found that the nonlinear convection behaves similarly to mean field dynamo models which incorporate a geostrophic nonlinearity. Various types of Ekman solution are found, and evolution to Taylor states is observed.
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6

Fraser, Samuel Carroll. "Prediction of thin films obliquely deposited in rotating recessed cones." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/9340.

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7

Chatzopoulos, E., Sean M. Couch, W. David Arnett, and F. X. Timmes. "CONVECTIVE PROPERTIES OF ROTATING TWO-DIMENSIONAL CORE-COLLAPSE SUPERNOVA PROGENITORS." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621238.

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We explore the effects of rotation on convective carbon, oxygen, and silicon shell burning during the late stages of evolution in a 20 M-circle dot star. Using the Modules for Experiments in Stellar Astrophysics we construct one-dimensional (1D) stellar models both with no rotation and with an initial rigid rotation of 50% of critical. At different points during the evolution, we map the 1D models into 2D and follow the multidimensional evolution using the FLASH compressible hydrodynamics code for many convective turnover times until a quasi-steady state is reached. We characterize the strength and scale of convective motions via decomposition of the momentum density into vector spherical harmonics. We find that rotation influences the total power in solenoidal modes, with a slightly larger impact for carbon and oxygen shell burning than for silicon shell burning. Including rotation in 1D stellar evolution models alters the structure of the star in a manner that has a significant impact on the character of multidimensional convection. Adding modest amounts of rotation to a stellar model that ignores rotation during the evolutionary stage, however, has little impact on the character of the resulting convection. Since the spatial scale and strength of convection present at the point of core collapse directly influence the supernova mechanism, our results suggest that rotation could play an important role in setting the stage for massive stellar explosions.
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8

Gaillard, Thomas. "Étude numérique du fonctionnement d’un moteur à détonation rotative." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC011/document.

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Cette thèse s’inscrit dans le domaine de la simulation numérique appliquée à la propulsion. Le moteur à détonation rotative (RDE) fait partie des candidats susceptibles de remplacer nos actuels moyens de propulsion grâce à l’augmentation du rendement thermodynamique du moteur. Pour conserver l’avantage de la détonation, l’injecteur doit fournir un mélange dont la qualité doit être la meilleure possible tout en limitant les pertes de pression totale. La présente étude porte sur le développement et l’optimisation numérique d’un injecteur adapté au fonctionnement d’un RDE. L’injection d’hydrogène et d’oxygène gazeux en rapport stoechiométrique est considérée pour une utilisation en propulsion fusée. Le premier objectif est de proposer un concept réaliste d’injecteur permettant de maximiser le mélange des ergols. Le second objectif est de réaliser des études du mélange dans la chambre par des simulations LES (Large Eddy Simulation). Le troisième objectif est de simuler la propagation d’une détonation rotative (RD) alimentée par différents injecteurs en régimes prémélangé et séparé. Deux éléments d’injection sont mis en concurrence. Le premier utilise le principe de jets semi-impactants de H2 et de O2. Le deuxième représente une configuration améliorée. Les simulations de RD avec les deux injecteurs donnent des résultats similaires lorsque l’injection est prémélangée. La part du mélange injecté perdu par déflagration est de 30% et la vitesse de propagation de la RD est proche de la vitesse théorique CJ. Pour les injections séparées de H2 et O2, l’injecteur amélioré permet de conserver un bon niveau de mélange dans la chambre, contrairement à l’injecteur à semi-impact qui produit une forte stratification des ergols dans la chambre. En conséquence, la vitesse de propagation de la RD est proche de la vitesse CJ avec l’injecteur amélioré et limitée à 80% de la vitesse CJ avec l’injecteur à semi-impact
This thesis pertains to the domain of numerical simulation for propulsion applications. The rotating detonation engine (RDE) appears to be a good candidate to replace our current means of propulsion thanks to the increase of the thermodynamic efficiency. To preserve the advantage given by the detonation mode, the injector must provide the best possible mixing of the propellants together with acceptable total pressure losses. This numerical study deals with developing and optimizing an injector adapted to the operation of a RDE. Injection of gaseous H2 and O2 at stoichiometric ratio is considered to be suitable for rocket propulsion application. The first goal is to propose an efficient injector design so that the mixing between the propellants is maximized. The second goal is to perform simulations of the mixing process in the chamber by LES (Large Eddy Simulation) computations. The third goal consists in computing the propagation of a rotating detonation (RD) fed by different injectors in premixed and separate regimes. This study allows the comparison of two injection elements. The first one uses the principle of semi-impinging jets of H2 and O2. The second one represents an improved configuration. RD simulations with both injectors provide similar results when premixed injection is considered. The part of the injected mixture that burns by deflagration is 30% and the detonation velocity remains close the theoretical CJ velocity. In the regime of separate injection of H2 and O2, the improved injector enables to keep a high mixing efficiency in the chamber whereas the semi-impingement injector produces a strong stratification of the propellants in the chamber. As a consequence, the detonation velocity is close to the CJ velocity with the improved injector and limited to 80% of the CJ velocity with the semi-impingement injector
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9

Seyed-Mahmoud, Behnam. "Elliptical instability in rotating ellipsoidal fluid shells applications to the earth's fluid core /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0004/NQ43451.pdf.

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10

Bergman, Michael I. (Michael Ira). "Magnetohydrodynamics of the Earth's core : 1) steady, rotating magnetoconvection 2) magnetic Rossby waves." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/51501.

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Книги з теми "Rotating cone"

1

Coward, Aidrian V. On the nonlinear interfacial instability of rotating core-annular flow. Hampton, Va: Institute for Computer Applications in Science and Engineering, 1993.

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2

Mortensen, Lori. Come see the Earth turn: The story of Léon Foucault. Berkeley, USA: Tricycle Press, 2010.

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3

Mortensen, Lori. Come see the Earth turn: The story of Léon Foucault. Berkeley: Tricycle Press, 2010.

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4

Creighton, Scott. The Giza prophecy: The Orion code and the secret teachings of the pyramids. Rochester, Vt: Bear & Co., 2012.

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5

W, Clayton Robert, Spieth Mary Ann, and United States. National Aeronautics and Space Administration., eds. Earth rotation and core topography, July 15, 1986 - September 14, 1987. Pasadena, CA: Seismological Laboratory, California Institute of Technology, 1988.

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6

(Editor), Veronique Dehant, Kenneth C. Creager (Editor), Shun-Ichiro Karato (Editor), and Stephen Zatman (Editor), eds. Earth's Core: Dynamics, Structure, Rotation (Geodynamics Series). American Geophysical Union, 2003.

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7

L, Le Mouël J., Smylie D. E, and Herring T, eds. Dynamics of earth's deep interior and earth rotation. Washington, DC: American Geophysical Union, 1993.

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8

Rajeev, S. G. Viscous Flows. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198805021.003.0005.

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Here some solutions of Navier–Stokes equations are found.The flow of a fluid along a pipe (Poisseuille flow) and that between two rotating cylinders (Couette flow) are the simplest. In the limit of large viscosity (small Reynolds number) the equations become linear: Stokes equations. Flow past a sphere is solved in detail. It is used to calculate the drag on a sphere, a classic formula of Stokes. An exact solution of the Navier–Stokes equation describing a dissipating vortex is also found. It is seen that viscosity cannot be ignored at the boundary or at the core of vortices.
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9

Taljanovic, Mihra S., Imran M. Omar, Kevin B. Hoover, and Tyson S. Chadaz, eds. Musculoskeletal Imaging Volume 1. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190938161.001.0001.

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This volume meets the needs of radiology residents to become adept at interpreting musculoskeletal (MSK) imaging studies. It does so by presenting core knowledge and fundamentals that must be learned to accurately and effectively interpret MSK studies by the trainee and non-specialist. The goal is to impart to residents, as well as to refresh for practitioners, essential facts in a concise and readable format so the reader becomes conversant with all imaging modalities used and the essentials of interpretation and technique. Other resources are at too high a level for the resident in training or contain far more information than a resident can easily assimilate during a rotation. The book is part of the Rotations in Radiology series for residents, which defines and encapsulates core knowledge for areas within Radiology, offering a guided, structured approach to imaging diagnosis. It contains sections on 10 key topics in MSK radiology: trauma; arthritis; tumors and tumor-like conditions; metabolic, hematopoietic, endocrine, and deposition diseases; infectious diseases; arthrography; internal derangements of the joints; congenital diseases; and ultrasound. Each section begins with an overview chapter, orienting the reader to the specific concerns and issues related to imaging that anatomic region or category of problem. Each clinical problem or diagnosis is concisely covered to provide a targeted discussion and highlight salient points. For each topic, concise chunks of text will review: definition; clinical features; anatomy and physiology; how to appraoch the image; what not to miss; differential diagnosis; common variants if pertinent; clinical issues; key points; high yield references.
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10

Taljanovic, Mihra S., Imran M. Omar, Kevin B. Hoover, and Tyson S. Chadaz, eds. Musculoskeletal Imaging Volume 2. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190938178.001.0001.

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This volume meets the needs of radiology residents to become adept at interpreting musculoskeletal (MSK) imaging studies. It does so by presenting core knowledge and fundamentals that must be learned to accurately and effectively interpret MSK studies by the trainee and non-specialist. The goal is to impart to residents, as well as to refresh for practitioners, essential facts in a concise and readable format so the reader becomes conversant with all imaging modalities used and the essentials of interpretation and technique. Other resources are at too high a level for the resident in training or contain far more information than a resident can easily assimilate during a rotation. The book is part of the Rotations in Radiology series for residents, which defines and encapsulates core knowledge for areas within Radiology, offering a guided, structured approach to imaging diagnosis. It contains sections on 10 key topics in MSK radiology: trauma; arthritis; tumors and tumor-like conditions; metabolic, hematopoietic, endocrine, and deposition diseases; infectious diseases; arthrography; internal derangements of the joints; congenital diseases; and ultrasound. Each section begins with an overview chapter, orienting the reader to the specific concerns and issues related to imaging that anatomic region or category of problem. Each clinical problem or diagnosis is concisely covered to provide a targeted discussion and highlight salient points. For each topic, concise chunks of text will review: definition; clinical features; anatomy and physiology; how to appraoch the image; what not to miss; differential diagnosis; common variants if pertinent; clinical issues; key points; high yield references.
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Частини книг з теми "Rotating cone"

1

Wagenaar, B. M., J. A. M. Kuipers, W. Prins, and W. P. M. van Swaaij. "The Rotating Cone Flash Pyrolysis Reactor." In Advances in Thermochemical Biomass Conversion, 1122–33. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1336-6_87.

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2

Kobayashi, R., and Y. Kohama. "Spiral Vortices in Boundary Layer Transition on a Rotating Cone." In Laminar-Turbulent Transition, 573–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82462-3_71.

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3

Durão, D. F. G., J. C. F. Pereira, and J. M. M. Sousa. "LDV Measurements of Confined Vortex Breakdown Generated by a Rotating Cone." In Developments in Laser Techniques and Applications to Fluid Mechanics, 34–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-79965-5_3.

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4

Shevchuk, Igor V. "Heat and Mass Transfer in Rotating Cone-and-Disk Systems for Laminar Flows." In Modelling of Convective Heat and Mass Transfer in Rotating Flows, 127–43. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20961-6_5.

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5

Kato, K., A. Segalini, P. H. Alfredsson, and R. J. Lingwood. "Instabilities and Transition on a Rotating Cone–Old Problems and New Challenges." In IUTAM Laminar-Turbulent Transition, 203–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67902-6_17.

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6

Rohe, Daniel P. "Modal Testing of a Nose Cone Using Three-Dimensional Scanning Laser Doppler Vibrometry." In Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8, 43–55. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30084-9_5.

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7

Shevchuk, Igor V. "Laminar Fluid Flow and Heat Transfer in a Gap Between a Disk and a Cone that Touches the Disk with Its Apex." In Convective Heat and Mass Transfer in Rotating Disk Systems, 179–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00718-7_7.

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8

Sodha, Janak. "Rotating Signal Point Shape Code." In Advances in Intelligent Systems and Computing, 876–80. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01177-2_65.

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Padmaja, K., and B. Rushi Kumar. "Dufour and Soret Effects on MHD Flow of $$\text {Cu}$$-Water and $$\text {Al}_2\text {O}_3$$-Water Nanofluid Flow Over a Permeable Rotating Cone." In Fuzzy Mathematical Analysis and Advances in Computational Mathematics, 221–36. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0471-4_16.

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Kersebaum, Kurt Christian. "Modelling to Evaluate Climate Resilience of Crop Rotations Under Climate Change." In Springer Climate, 87–93. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-86211-4_11.

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AbstractDiversification of crop rotations is considered as an option to increase the resilience of European crop production under climate change. Although crop rotation design and management has been identified as an important measure to adapt to and mitigate climate change, most studies on climate change impact or adaptation so far use single-year simulations and/or single crop assessments. Crop response to various management options within a growing season is generally taken into account by most crop models. However, if simulations neglect processes and fluxes between growing seasons and potential carry-over effects related to agronomic management, the long-term sustainability of adaptation and mitigation strategies cannot be properly evaluated. Therefore, the integrated assessment of impacts, adaptation and mitigation options under current and future climatic conditions requires a continuous long-term analysis of crop sequences to take into account carry-over effects as in real conditions. The present paper provides information on crop rotation aspects, which should be considered in modelling, presents the current state of modelling for climate impact assessment, address points of uncertainty and missing aspects in modelling and draws an outlook on potential future developments with special emphasis on crop rotations. In conclusion, crop models require suitable experimental data to parameterize additional crops, which were so far not sufficiently investigated to cope with multiple opportunities in crop rotations.
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Тези доповідей конференцій з теми "Rotating cone"

1

Ye, Ivan B., and Ge Wang. "Orthogonal-rotating tetrahedral scanning for cone-beam CT." In SPIE Optical Engineering + Applications, edited by Stuart R. Stock. SPIE, 2012. http://dx.doi.org/10.1117/12.929179.

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2

May, N. E., J. W. Chew, and P. W. James. "Calculation of Turbulent Flow for an Enclosed Rotating Cone." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-070.

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Prediction of the flow in the cavity between a rotating cone and an outer stationary cone with and without throughflow is considered. A momentum-integral method and a finite difference method for solution of the Reynolds-averaged Navier-Stokes equations with a mixing-length model of turbulence are applied. These two methods have previously been validated for flow between co-rotating and rotor-stator disc systems, but have not been properly tested for conical systems. Both methods have been evaluated by comparing predictions with the experimental measurements of other workers. There is good agreement for cone half angles greater than or equal to 60’ but discrepancies are evident for smaller angles. ‘Taylor-type’ vortices, the existence of which has been postulated by other workers and which are not captured by the present steady, axisymmetric models, may contribute to these discrepancies.
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3

Leung, Wallace Woon-Fong. "Non-Equilibrium Thin-Film Flow in Rotating Disk and Cone." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67995.

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The acceleration of a continuous feed liquid stream in a film “down” the rotating cone and disk is of great interest in centrifuges [1, 2], thin-film reactors and process intensifiers. The mechanism of feed acceleration is determined by an interaction of several different effects. Circumferential viscous forces act to increase the angular momentum. The centrifugal field thus produced establishes a body-force component along the cone/disk surface, thereby driving the flow “down” toward larger radius. The longitudinal flow is however impeded by longitudinal resistance forces. These different effects compete with each other as the flow proceeds, never quite coming to an unchanging equilibrium state. An approximate integral method which was used to explore the “near-equilibrium” flow behavior in earlier work has been extended to investigate the case with large departure from equilibrium. The latter exhibits complicated highly nonlinear effect. Despite this, useful information can be obtained from the theoretical analysis. Experimental results on feed acceleration of liquid streams at various feed rates and rotation speeds in a rotating cone have been used to validate the study. The theoretical study with complementary experimental tests provides insights into how continuous liquid stream in form of a thin film is being accelerated using rotating cones and disks, and the associated shear rates involved. The latter has important bearing in processing shear-sensitive mammalian cells in biopharmaceutical separation with centrifuges and mass transfer in thin-film reactors.
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4

Zhang, Lifen, Meihua Zhang, Xiaoxue Zhang, and Zhenxia Liu. "Modeling of ice accretion on rotating cone in aero-engine." In 52nd AIAA/SAE/ASEE Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-5059.

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5

Fang, Chengyijue, Gongming Xu, and Lei Zhu. "Single scan dual energy cone beam CT using a rotating filter." In Physics of Medical Imaging, edited by Hilde Bosmans and Guang-Hong Chen. SPIE, 2020. http://dx.doi.org/10.1117/12.2549498.

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6

Bergner, Frank, Timo Berkus, Markus Oelhafen, Patrik Kunz, Tinsu Pan, and Marc Kachelriess. "A comparison of 4D cone-beam CT algorithms for slowly rotating scanners." In 2009 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2009). IEEE, 2009. http://dx.doi.org/10.1109/nssmic.2009.5401884.

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7

Towers, Paul, and Stephen Garrett. "On the Stability of the Compressible Boundary-layer Flow Over a Rotating Cone." In 42nd AIAA Fluid Dynamics Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-2693.

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8

Gilchrist, Scott, Daniel Ewing, Chan Ching, Joseph Brand, and Michael Dowhan. "Thermal Modeling of a Rotating Heat Pipe Aero-Engine Nose Cone Anti-Icing System." In General Aviation Technology Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-1817.

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9

Lu, Zhiyong. "Separation control for a strake-wing by rotating cone placed near the leading edge." In 38th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-521.

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10

Junsheng, Li. "The Optimal of Pyrolysis Process in the Rotating Cone Reactor and Pyrolysis Product Analysis." In 2010 International Conference on Challenges in Environmental Science and Computer Engineering. IEEE, 2010. http://dx.doi.org/10.1109/cesce.2010.74.

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Звіти організацій з теми "Rotating cone"

1

E.J. Synakowski, F.M. Levinton, M.C. Zarnstorff, R.E. Bell, S.H. Batha, and et al. Core Poloidal Rotation and Internal Trnasport Barrier Formation in TFTR. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/3750.

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2

Michalsky, J., and L. Harrison. Development of rotating shadowband spectral radiometers and GCM radiation code test data sets in support of ARM. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/5450378.

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3

Michalsky, J., and L. Harrison. Development of rotating shadowband spectral radiometers and GCM radiation code test data sets in support of ARM. Technical progress report. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/10137141.

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4

Michalsky, J., and L. Harrison. Development of rotating shadowband spectral radiometers and GCM radiation code test data sets in support of ARM. Technical progress report, September 15, 1992--October 31, 1993. Office of Scientific and Technical Information (OSTI), April 1993. http://dx.doi.org/10.2172/10184898.

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5

Harrison, L., and J. Michalsky. Development of rotating shadowband spectral radiometers and GCM radiation code test data sets in support of ARM. Technical progress report, September 15, 1990--September 14, 1991. Office of Scientific and Technical Information (OSTI), March 1991. http://dx.doi.org/10.2172/238501.

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6

Abbo, Shahal, Hongbin Zhang, Clarice Coyne, Amir Sherman, Dan Shtienberg, and George J. Vandemark. Winter chickpea; towards a new winter pulse for the semiarid Pacific Northwest and wider adaptation in the Mediterranean basin. United States Department of Agriculture, January 2011. http://dx.doi.org/10.32747/2011.7597909.bard.

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Original objectives: [a] Screen an array of chickpea and wild annual Cicer germplasm for winter survival. [b] Genetic analysis of winter hardiness in domesticated x wild chickpea crosses. [c] Genetic analysis of vernalization response in domesticated x wild chickpea crosses. [d] Digital expression analysis of a core selection of breeding and germplasm lines of chickpea that differ in winter hardiness and vernalization. [e] Identification of the genes involved in the chickpea winter hardiness and vernalization and construction of gene network controlling these traits. [f] Assessing the phenotypic and genetic correlations between winter hardiness, vernalization response and Ascochyta blight response in chickpea. The complexity of the vernalization response and the inefficiency of our selection experiments (below) required quitting the work on ascochyta response in the framework of this project. Background to the subject: Since its introduction to the Palouse region of WA and Idaho, and the northern Great Plains, chickpea has been a spring rotation legume due to lack of winter hardiness. The short growing season of spring chickpea limits its grain yield and leaves relatively little stubble residue for combating soil erosion. In Israel, chilling temperatures limit pod setting in early springs and narrow the effective reproductive time window of the crop. Winter hardiness and vernalization response of chickpea alleles were lost due to a series of evolutionary bottlenecks; however, such alleles are prevalent in its wild progenitor’s genepool. Major conclusions, solutions, achievements: It appears that both vernalization response and winter hardiness are polygenic traits in the wild-domesticated chickpea genepool. The main conclusion from the fieldwork in Israel is that selection of domesticated winter hardy and vernalization responsive types should be conducted in late flowering and late maturity backgrounds to minimize interference by daylength and temperature response alleles (see our Plant Breeding paper on the subject). The main conclusion from the US winter-hardiness studies is that excellent lines have been identified for germplasm release and continued genetic study. Several of the lines have good seed size and growth habit that will be useful for introgressing winter-hardiness into current chickpea cultivars to develop releases for autumn sowing. We sequenced the transcriptomes and profiled the expression of genes in 87 samples. Differential expression analysis identified a total of 2,452 differentially expressed genes (DEGs) between vernalized plants and control plants, of which 287 were shared between two or more Cicer species studied. We cloned 498 genes controlling vernalization, named CVRN genes. Each of the CVRN genes contributes to flowering date advance (FDA) by 3.85% - 10.71%, but 413 (83%) other genes had negative effects on FDA, while only 83 (17%) had positive effects on FDA, when the plant is exposed to cold temperature. The cloned CVRN genes provide new toolkits and knowledge to develop chickpea cultivars that are suitable for autumn-sowing. Scientific & agricultural implications: Unlike the winter cereals (barley, wheat) or pea, in which a single allelic change may induce a switch from winter to spring habit, we were unable to find any evidence for such major gene action in chickpea. In agricultural terms this means that an alternative strategy must be employed in order to isolate late flowering – ascochyta resistant (winter types) domesticated forms to enable autumn sowing of chickpea in the US Great Plains. An environment was identified in U.S. (eastern Washington) where autumn-sown chickpea production is possible using the levels of winter-hardiness discovered once backcrossed into advanced cultivated material with acceptable agronomic traits. The cloned CVRN genes and identified gene networks significantly advance our understanding of molecular mechanisms underlying plant vernalization in general, and chickpea in particular, and provide a new toolkit for switching chickpea from a spring-sowing to autumn-sowing crop.
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MECHANICAL PRORERTIES OF EXPOSED COLUMN BASE CONNECTIONS FOR L-SHAPED COLUMNS FABRICATED USING CONCRETE-FILLED STEEL TUBES. The Hong Kong Institute of Steel Construction, December 2021. http://dx.doi.org/10.18057/ijasc.2021.17.4.4.

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The response of exposed column base connections for L-shaped column is investigated through finite element analysis (FEA) in this paper which is affected by complex interactions among different components. Three finite element models are constructed to simulate the response of these connections under axial and cyclic horizontal loading, which interrogate a range of variables including anchor rod strength, base plate size and thickness. The results of the simulations provide insights into internal stress distributions which have not been measured directly through experiments. The key findings indicate that thicker base plates tend to shift the stresses to the toe of the base plate, while thinner plates concentrate the stresses under the column flange. Base on the analytical results, a hysteretic model is proposed to describe the cyclic moment-rotation response of exposed column base connections. The core parameters used to define the backbone curve of the hysteretic model are calibrated through configurational details. The comparison between the simulation and the calculated values indicates that the hysteretic model is suitable to characterize the key aspects of the physical response, including pinching, recentering and flag-shaped hysteresis phenomenon. Limitations of the model are outlined.
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