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Journal articles on the topic 'Rotating'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Erasmus, N., D. Kramer, A. McNeill, et al. "Discovery of superslow rotating asteroids with ATLAS and ZTF photometry." Monthly Notices of the Royal Astronomical Society 506, no. 3 (2021): 3872–81. http://dx.doi.org/10.1093/mnras/stab1888.

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ABSTRACT We present here the discovery of a new class of superslow rotating asteroids (Prot ≳1000 h) in data extracted from the Asteroid Terrestrial-impact Last Alert System (ATLAS) and Zwicky Transient Facility (ZTF) all-sky surveys. Of the 39 rotation periods we report here, 32 have periods longer than any previously reported unambiguous rotation periods currently in the Asteroid Light Curve Data base. In our sample, seven objects have a rotation period &gt;4000 h and the longest period we report here is 4812 h (∼200 d). We do not observe any correlation between taxonomy, albedo, or orbi

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2

LOPEZ, J. M. "Characteristics of endwall and sidewall boundary layers in a rotating cylinder with a differentially rotating endwall." Journal of Fluid Mechanics 359 (March 25, 1998): 49–79. http://dx.doi.org/10.1017/s002211209700829x.

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The flow in a rotating cylinder driven by the differential rotation of its top endwall is studied by numerically solving the time-dependent axisymmetric Navier–Stokes equations. When the differential rotation is small, the flow is well described in terms of similarity solutions of individual rotating disks of infinite radius. For larger differential rotations, whether the top is co-rotating or counter-rotating results in qualitatively distinct behaviour. For counter-rotation, the boundary layer on the top endwall separates, forming a free shear layer and this results in a global coupling betwe

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3

Kazachkov, Ivan. "Modeling of the Flow due to Double Rotations Causing Phenomenon of Negative Pressure." WSEAS TRANSACTIONS ON FLUID MECHANICS 18 (December 31, 2023): 259–71. http://dx.doi.org/10.37394/232013.2023.18.25.

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This paper is devoted to mathematical modeling and computational experiments of a flow with negative pressure. A previously unknown class of fluid flow under the action of counter-current centrifugal forces is in focus. Volumetric forces in a non-conducting fluid can arise from gravity, vibrations, or rotations. In this paper, we consider controlled variable volumetric forces in a system with two rotations around the vertical axis and the tangential axis of a horizontal disk rotating around the vertical axis. The study of the coordinate system during double rotation showed that the double rota

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4

Fischer, Patrick, Charles-Henri Bruneau, and Hamid Kellay. "Numerical Study of Rotating Thermal Convection on a Hemisphere." Fluids 5, no. 4 (2020): 185. http://dx.doi.org/10.3390/fluids5040185.

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Numerical simulations of rotating two-dimensional turbulent thermal convection on a hemisphere are presented in this paper. Previous experiments on a half soap bubble located on a heated plate have been used for studying thermal convection as well as the effects of rotation on a curved surface. Here, two different methods have been used to produce the rotation of the hemisphere: the classical rotation term added to the velocity equation, and a non-zero azimuthal velocity boundary condition. This latter method is more adapted to the soap bubble experiments. These two methods of forcing the rota

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Shaymatov, Sanjar, Bobomurat Ahmedov, and Eldor Karimbaev. "Can a Rotating Black Hole Be Overspun in Seven Dimensions?" Universe 9, no. 4 (2023): 190. http://dx.doi.org/10.3390/universe9040190.

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Five-dimensional rotating black holes with two rotations could be overspun except for a single rotation, whereas a black hole in six dimensions always obeys the weak cosmic censorship conjecture (WCCC) in the weak form even for linear particle accretion. In this paper, we investigate the overspinning of a seven-dimensional rotating black hole with three rotation parameters. It is shown that a black hole in the seven dimensions cannot be similarly overspun, thereby obeying the WCCC even under linear particle accretion. It turns out that a black hole always respects the weak cosmic censorship co

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6

Li, Jingyuan, and Zifeng Li. "Applications of the Theory of Continuous Oil Film Lubrication of a Radial Sliding Bearing for Three Combined Conditions." Applied Physics Research 8, no. 2 (2016): 22. http://dx.doi.org/10.5539/apr.v8n2p22.

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<p class="1Body">The theory of lubrication of a radial sliding bearing is extended to three cases: the shaft neck rotation and bush rotation bearing, the rotating load bearing, and the floating sleeve bearing. For the bearing with rotating shaft neck and rotating bush, fixing the observer at the bushing can enable the determination, in a simple and more accurate manner, of the bearing capacity of the bearing with the rotating load. As long as a rotating load exists, whirl exists; if the shaft rotation speed is 2 times the load rotation speed, then the eccentricity reaches the maximum.&lt

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7

Jose, Sharath, and Rama Govindarajan. "Non-normal origin of modal instabilities in rotating plane shear flows." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2233 (2020): 20190550. http://dx.doi.org/10.1098/rspa.2019.0550.

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Small variations introduced in shear flows are known to affect stability dramatically. Rotation of the flow system is one example, where the critical Reynolds number for exponential instabilities falls steeply with a small increase in rotation rate. We ask whether there is a fundamental reason for this sensitivity to rotation. We answer in the affirmative, showing that it is the non-normality of the stability operator in the absence of rotation which triggers this sensitivity. We treat the flow in the presence of rotation as a perturbation on the non-rotating case, and show that the rotating c

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8

Soong, C. Y. "Thermal Buoyancy Effects in Rotating Non-Isothermal Flows." International Journal of Rotating Machinery 7, no. 6 (2001): 435–46. http://dx.doi.org/10.1155/s1023621x01000380.

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The present paper is concerned with the non-isothermal flow mechanisms in rotating systems with emphasis on the rotation-induced thermal buoyancy effects stemming from the coexistence of rotational body forces and the nonuniformity of the fluid temperature field. Non-isothermal flow in rotating ducts of radial and parallel modes and rotating cylindrical configurations, including rotating cylinders and disk systems, are considered. Previous investigations closely related to the rotational buoyancy are surveyed. The mechanisms of the rotation-induced buoyancy are manifested by the author's recen

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9

Zhang, Zi Cheng, Kenichi Manabe, Tsuyoshi Furushima, and Kazuo Tada. "Development of Cyclic Rotating Bending Process for Microstructure Control of AZ31 Magnesium Alloy Tube." Advanced Materials Research 652-654 (January 2013): 1956–60. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.1956.

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In this study a cyclic rotating bending process for microstructure control of metal tubes was newly proposed. The AZ31 magnesium alloy tube was conducted to investigate the effect of the rotating bending process on the microstructure and mechanical properties of metal tubes. The rotating bending process was carried out with rotation speed of 20r/min for 10min at the temperature of 150, 200, 250, 300 and 350°C. The rotating bending processes carried out with various conditions show that the grains in cross-section and longitudinal section of magnesium alloy tube were refined for all samples by

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10

Ekene, Ilechukwu Anthonia, Omenyi Sam, Abonyi Sylvester Emeka, Okafor Anthony Amaechi, and Odeh Calistus Princewill. "Theoretical and Simulation Finite Element Modal Analysis of Rotating Cantilever Beam." International Journal of Research and Innovation in Applied Science IX, no. II (2024): 291–306. http://dx.doi.org/10.51584/ijrias.2024.90225.

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The finite element method is used to carry out modal analysis of rotating cantilever beam. The virtual work method is then used to derive the stiffness matrix of a rotating beam element. The stiffness matrix of a rotating beam element is simply seen to be sum of the stiffness matrix of the non-rotating beam and an incremental stiffness matrix induced by rotation. This work presents a novel generalized incremental stiffness matrix that takes care of any element at any distance from the rotation axis. The established rotational stiffness matrix is then used together with consistent mass matrix (

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11

Boshkayev, K. "Non-rotating and slowly rotating stars in classical physics." International Journal of Mathematics and Physics 5, no. 1 (2014): 69–80. http://dx.doi.org/10.26577/2218-7987-2014-5-1-69-80.

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12

Collier Cameron, A. "Differential rotation on rapidly rotating stars." Astronomische Nachrichten 328, no. 10 (2007): 1030–33. http://dx.doi.org/10.1002/asna.200710880.

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13

Bormashenko, Edward. "Rotating Minimal Thermodynamic Systems." Entropy 24, no. 2 (2022): 168. http://dx.doi.org/10.3390/e24020168.

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Minimal rotating thermodynamic systems are addressed. Particle m placed into the rotating symmetrical double-well potential (bowl), providing binary logical system is considered. The condition providing the transfer of the particle from one frictionless half-well to another, and, in this way, the possibility to record 1 bit of information is derived. The procedure of recording turns out to be irreversible; it is impossible to return the particle to its initial state under rotation about the same axis. The same rotating double-well system exerted to the thermal noise is considered. A minimal ro

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14

Lim, C. C. "The Super- and Sub-Rotation of Barotropic Atmospheres on a Rotating Planet." Nelineinaya Dinamika 18, no. 1 (2022): 19–42. http://dx.doi.org/10.20537/nd220102.

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A statistical mechanics canonical spherical energy-enstrophy theory of the superrotation phenomenon in a quasi-2D barotropic fluid coupled by inviscid topographic torque to a rotating solid body is solved in closed form in Fourier space, with inputs on the value of the energy to enstrophy quotient of the fluid, and two planetary parameters — the radius of the planet and its rate and the axis of spin. This allows calculations that predict the following physical consequences: (A) two critical points associated with the condensation of high and low energy (resp.) states in the form of distinct su

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15

Geng, Xinge, Weiguo Wu, Erpeng Liu, Yongshui Lin, Wei Chen, and Chang-Kyu Rheem. "Experimental Study on Vibration of a Rotating Pipe in Still Water and in Flow." Polish Maritime Research 30, no. 1 (2023): 65–77. http://dx.doi.org/10.2478/pomr-2023-0007.

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Abstract To illustrate the vibration characteristics of a rotating pipe in flow, experiments were conducted for a pipe in flow, a rotating pipe in still water and a rotating pipe in flow. For the pipe in flow without rotation, the trajectory diagram is ‘8’ shaped. For the rotating pipe in still water, a multiple frequency component was induced, and a ‘positive direction whirl’ was found. For the flow and rotation, at a flow velocity of 0.46 m/s, the vibration is dominated by the combination of flow and rotation. With an increase in rotating frequency, the trajectory of the rotating pipe varies

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16

Kolsi, Lioua, Fatih Selimefendigil, Samia Larguech, et al. "Convective Heat Transfer and Entropy Generation for Nano-Jet Impingement Cooling of a Moving Hot Surface under the Effects of Multiple Rotating Cylinders and Magnetic Field." Mathematics 11, no. 8 (2023): 1891. http://dx.doi.org/10.3390/math11081891.

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In this study, confined slot nano-jet impingement cooling of a hot moving surface is investigated under the combined utilization multiple rotating cylinders and magnetic field. Both convective heat transfer and entropy generation analysis are conducted using a finite element method. Parametric variation of the rotational Reynolds number (Rew between −500 and 500), velocity ratio (VR between 0 and 0.25), Hartmann number (Ha between 0 and 20) and the horizontal location of cylinders (Mx between −8 and 8) are considered. Rotation of the cylinders generally resulted in the degradation of cooling p

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17

Hirschi, Raphael, Georges Meynet, André Maeder, and Stéphane Goriely. "Pre-Supernova Evolution of Rotating Massive Stars." International Astronomical Union Colloquium 192 (2005): 209–13. http://dx.doi.org/10.1017/s0252921100009209.

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SummaryThe Geneva evolutionary code has been modified to study the advanced stages (Ne, O, Si burnings) of rotating massive stars. Here we present the results of four 20 M⊙ stars at solar metallicity with initial rotational velocities, vini, of 0, 100, 200 and 300 km/s in order to show the crucial role of rotation in stellar evolution. As already known, rotation increases mass loss and core masses [4]. A fast rotating 20 M⊙ star has the same central evolution as a non-rotating 26 M⊙. Rotation also increases strongly net total metal yields. Furthermore, rotation changes the SN type so that more

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18

Jaekl, P., M. Jenkin, and L. R. Harris. "Perceptual stability during active head movements orthogonal and parallel to gravity." Journal of Vestibular Research 13, no. 4-6 (2003): 265–71. http://dx.doi.org/10.3233/ves-2003-134-611.

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We measured how much the visual world could be moved during various head rotations and translations and still be perceived as visually stable. Using this as a monitor of how well subjects know about their own movement, we compared performance in different directions relative to gravity. For head rotations, we compared the range of visual motion judged compatible with a stable environment while rotating around an axis orthogonal to gravity (where rotation created a rotating gravity vector across the otolith macula), with judgements made when rotation was around an earth-vertical axis. For trans

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19

Boshkayev, K., J. A. Rueda, R. Ruffini, B. Zhami, Zh Kalymova, and G. Balgimbekov. "Non-rotating and slowly rotating white dwarfs in classical physics." Physical Sciences and Technology 2, no. 1 (2015): 66–71. http://dx.doi.org/10.26577/2409-6121-2015-2-1-66-71.

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20

Gulyaev, V. I., A. A. Kirichuk, P. P. Lizunov, and A. V. Mirchevskii. "Vibrations of a rotating membrane with unsteady rotations of the axis of rotation." Strength of Materials 22, no. 2 (1990): 223–29. http://dx.doi.org/10.1007/bf00773242.

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21

Yang, Wen-Jei, Shin Fann, and John H. Kim. "Heat and Fluid Flow Inside Rotating Channels." Applied Mechanics Reviews 47, no. 8 (1994): 367–96. http://dx.doi.org/10.1115/1.3111084.

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Power generation and refrigeration accomplished by means of rotating or reciprocating machinery. One of the basic elements of rotating machinery is the rotating channel system. With the desire for ever increasing efficiency in power generation and refrigeration, higher or lower operating temperatures are achieved. It has provided motivation for the pursuit of knowledge on heat transfer and fluid flow characteristics. This paper reviews the literature pertinent to studies of fluid flow and/or heat transfer in channel flows subjected to radial rotation, parallel rotation, and coaxial revolution.

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22

Myung, Yun Soo, and De-Cheng Zou. "Scalarization of slowly rotating black holes." International Journal of Modern Physics D 30, no. 11 (2021): 2150082. http://dx.doi.org/10.1142/s0218271821500826.

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It is interesting to note that most black holes are born very slowly rotating. We investigate scalarization of slowly rotating black holes in the Einstein-scalar-Chern–Simons (EsCS) theory. In the slow rotation approximation, the CS term takes a linear form of rotation parameter [Formula: see text] which determines the tachyonic instability. The tachyonic instability for slowly rotating black holes represents the onset of spontaneous scalarization. It is shown that the slowly rotating black holes are unstable against a spherically symmetric scalar-mode perturbation for positive coupling [Formu

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23

Kim, J. "Rotation Effects on Vibration of Structures Seen From a Rotating Beam Simply Supported off the Rotation Axis." Journal of Vibration and Acoustics 128, no. 3 (2005): 328–37. http://dx.doi.org/10.1115/1.2172261.

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In rotating beams, the Coriolis force acts through the mass and rotary inertias of the beam. A rotating beam simply supported off the axis of rotation is used as an example to study effects of this Coriolis force on vibration of structures. By adopting such a simple model, mass- and rotary inertia-induced terms in the free vibration responses can be obtained in separate, closed forms. The effect of each of these terms on vibration characteristics of the rotating beam is discussed in relation to parameters such as nonrotating natural frequencies, the rotation speed, and the slenderness ratio. P

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Mitra, Shiladitya. "The curious case of the spinning neuronal mass." F1000Research 4 (January 27, 2015): 27. http://dx.doi.org/10.12688/f1000research.6044.1.

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Rotating cells have been reported in past. Rotation of cells and cell clusters has been associated with migration and development. This observation reports for the first time a rotating cluster of cells isolated from the hippocampi of neonatal mouse pups. The speed of rotation in these clusters is immensely high. Further analysis of such rotating neurons can shed valuable clues on the origin of such cells, their electro-mechanical properties and their role in the development of the brain.

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25

Gürer, Derya, Douwe J. J. van Hinsbergen, Murat Özkaptan, et al. "Paleomagnetic constraints on the timing and distribution of Cenozoic rotations in Central and Eastern Anatolia." Solid Earth 9, no. 2 (2018): 295–322. http://dx.doi.org/10.5194/se-9-295-2018.

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Abstract. To quantitatively reconstruct the kinematic evolution of Central and Eastern Anatolia within the framework of Neotethyan subduction accommodating Africa–Eurasia convergence, we paleomagnetically assess the timing and amount of vertical axis rotations across the Ulukışla and Sivas regions. We show paleomagnetic results from ∼ 30 localities identifying a coherent rotation of a SE Anatolian rotating block comprised of the southern Kırşehir Block, the Ulukışla Basin, the Central and Eastern Taurides, and the southern part of the Sivas Basin. Using our new and published results, we comput

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Ren, Baoming, Jiadong Zhang, Zhida Yang, et al. "Plasma rotation driven by rotating magnetic fields." Plasma Physics and Controlled Fusion 63, no. 3 (2021): 035027. http://dx.doi.org/10.1088/1361-6587/abdcdd.

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27

Reiners, A., and J. H. M. M. Schmitt. "Differential rotation in rapidly rotating F-stars." Astronomy & Astrophysics 412, no. 3 (2003): 813–19. http://dx.doi.org/10.1051/0004-6361:20034255.

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28

Fetterman, Abraham J., and Nathaniel J. Fisch. "Wave-Driven Rotation in Supersonically Rotating Mirrors." Fusion Science and Technology 57, no. 4 (2010): 343–50. http://dx.doi.org/10.13182/fst10-a9496.

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29

Welsh, Stephen S., and Johannes Courtial. "View rotation with parallel ray-rotating windows." Optics Communications 285, no. 24 (2012): 4802–6. http://dx.doi.org/10.1016/j.optcom.2012.07.060.

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30

Chan, Kwing L., and Hans G. Mayr. "Rotating convection and the solar differential rotation." Solar Physics 152, no. 1 (1994): 283–90. http://dx.doi.org/10.1007/bf01473216.

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31

Chan, K. L. "Rotating convection in f-boxes: Faster rotation." Astronomische Nachrichten 328, no. 10 (2007): 1059–61. http://dx.doi.org/10.1002/asna.200710837.

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32

Wang, Fengbin, Yuhua Li, Guangqin Shi, Guozhu Li, Xupeng Li, and Wei Wang. "Design and implementation of high-rigidity and high-precision satellite antenna rotating unit." Journal of Physics: Conference Series 2760, no. 1 (2024): 012015. http://dx.doi.org/10.1088/1742-6596/2760/1/012015.

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Abstract The satellite antenna rotating unit is an important component that drives the satellite antenna to rotate in orbit, mainly composed of a stepper motor, harmonic reducer, and rotating transformer. This type of rotating unit has the advantages of small size, lightweight, high-rated output torque, and long rotating life. The high-stiffness and high-precision satellite antenna rotation unit is based on the existing antenna rotation unit. Through comprehensive improvement design, the measured closed-loop control has a rotation accuracy of better than 0.005°, a torsional stiffness of better

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Sofia, S., J. M. Howard, and P. Demarque. "The Evolution of Rotating 15 M⊙ Stars." Symposium - International Astronomical Union 162 (1994): 131–44. http://dx.doi.org/10.1017/s007418090021471x.

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Theoretical evolutionary sequences have been generated with the YREC code for a 15 M⊙ star from the ZAMS to core helium exhaustion with a variety of physical assumptions, covering both rotating and non-rotating cases. The non-rotating models agree qualitatively with other models found in the literature. The addition of only rotational distortion has little effect on the models, while the full treatment of rotation results in additional mixing and theoretical tracks that are similar to models with small amounts of convective overshoot. Models which include only rotation have fair agreement with

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Torii, Shuichi, and Wen-Jei Yang. "Secondary Flow Phenomena in an Axially Rotating Flow Passage with Sudden Expansion or Contraction." International Journal of Rotating Machinery 5, no. 2 (1999): 117–22. http://dx.doi.org/10.1155/s1023621x9900010x.

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This paper investigates rotational effects on secondary flow in rotating flow passages with sudden expansion or contraction. Consideration is given to laminar flow. The governing boundary-layer equations are discretized by means of a finite-difference technique and numerically solved to determine the distributions of velocity vector under the appropriate boundary conditions. The Reynolds number (Re) and rotation rate are varied to determine their effects on the formation ofsecondary flows. It is disclosed from the study that: (i) when laminar flow is introduced into an axially rotating pipe wi

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Hanhan, O., D. Orhon, Kh Krauth, and B. Günder. "Evaluation of denitrification potential of rotating biological contactors for treatment of municipal wastewater." Water Science and Technology 51, no. 11 (2005): 131–39. http://dx.doi.org/10.2166/wst.2005.0399.

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In this study the effect of retention time and rotation speed in the denitrification process in two full-scale rotating biological contactors (RBC) which were operated parallel and fed with municipal wastewater is evaluated. Each rotating biological contactor was covered to prevent oxygen input. The discs were 40% submerged. On the axle of one of the rotating biological contactors lamellas were placed (RBC1). During the experiments the nitrate removal performance of the rotating biological contactor with lamellas was observed to be less than the other (RBC2) since the lamellas caused oxygen di

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36

Hansen, Niels Chr, and David Huron. "Twirling Triplets: The Qualia of Rotation and Musical Rhythm." Music & Science 2 (January 1, 2019): 205920431881224. http://dx.doi.org/10.1177/2059204318812243.

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While musicologists have long noted that triplet rhythms evoke sensations of rotation in listeners, no theory has been proposed to account for this apparent association. To investigate this phenomenon, 33 excerpts of “spinning, rotating, twirling, or swirling” music were crowd-sourced from an online discussion forum. Analysis revealed a prominence of fast, repeated, isochronous patterns using stepwise pitch movement, with significantly more compound meters than generally found in Western music. Inspired by ecological acoustics, an Ecological Theory of Rotating Sounds (ETRoS) is proposed to exp

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PAN, Y. Y., C. M. ZHANG, Y. H. ZHAO, and R. JUN. "A TETRAD DESCRIPTION ON THE DIRAC SPIN-ROTATION EFFECT." International Journal of Modern Physics D 20, no. 10 (2011): 1979–82. http://dx.doi.org/10.1142/s0218271811020044.

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Rotation and Dirac spin coupling is described by the tetrad field for a rotating system, where the rotation-spin effect is replaced by an axial torsion-spin. After constructing a rotating tetrad field, we derive the torsion quantities, by which we deal with the torsion-spin coupling.

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Huang, F. Y., and C. D. Mote. "On the Instability Mechanisms of a Disk Rotating Close to a Rigid Surface." Journal of Applied Mechanics 62, no. 3 (1995): 764–71. http://dx.doi.org/10.1115/1.2897012.

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The instability mechanisms of a rotating disk, coupled to a rigid surface through a viscous fluid film at the interface, are investigated analytically. The fluid in the film is driven circumferentially by the viscous shear, and it flows outwards radially under centrifugal forces. The circumferential flow component creates an equivalent viscous damping rotating at one half the disk rotation speed. This film damping dissipates all backward traveling waves where the undamped wave speeds are greater than one half the disk rotation speed. The radial flow component creates a nonsymmetric stiffness i

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Choplin, Arthur, Raphael Hirschi, Georges Meynet, Sylvia Ekström, Cristina Chiappini, and Alison Laird. "Non-standard s-process in massive rotating stars." Astronomy & Astrophysics 618 (October 2018): A133. http://dx.doi.org/10.1051/0004-6361/201833283.

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Context. Recent studies show that rotation significantly affects the s-process in massive stars. Aims. We provide tables of yields for non-rotating and rotating massive stars between 10 and 150 M⊙ at Z = 10−3 ([Fe/H] = −1.8). Tables for different mass cuts are provided. The complete s-process is followed during the whole evolution with a network of 737 isotopes, from hydrogen to polonium. Methods. A grid of stellar models with initial masses of 10, 15, 20, 25, 40, 60, 85, 120, and 150 M⊙ and with an initial rotation rate of both 0% or 40% of the critical velocity was computed. Three extra mode

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Jain, Kiran, Rudolf Komm, Irene González Hernández, Sushant C. Tripathy, and Frank Hill. "Subsurface flows associated with rotating sunspots." Proceedings of the International Astronomical Union 6, S273 (2010): 356–60. http://dx.doi.org/10.1017/s1743921311015547.

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AbstractIn this paper, we compare components of the horizontal flow below the solar surface in and around regions consisting of rotating and non-rotating sunspots. Our analysis suggests that there is a significant variation in both components of the horizontal flow at the beginning of sunspot rotation as compared to the non-rotating sunspot. The flows in surrounding areas are in most cases relatively small. However, there is a significant influence of the motion on flows in an area closest to the sunspot rotation.

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Liu, Xiaojuan, David S. Battisti, and Gerard H. Roe. "The Effect of Cloud Cover on the Meridional Heat Transport: Lessons from Variable Rotation Experiments." Journal of Climate 30, no. 18 (2017): 7465–79. http://dx.doi.org/10.1175/jcli-d-16-0745.1.

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Abstract The question “What determines the meridional heat transport (MHT)?” is explored by performing a series of rotation-rate experiments with an aquaplanet GCM coupled to a slab ocean. The change of meridional heat transport with rotation rate falls into two regimes: in a “slow rotating” regime (rotation rate &lt; 1/2 modern rotation) MHT decreases with increasing rotation rate, whereas in a “fast rotating” regime (rotation rate ≥ 1/2 modern rotation) MHT is nearly invariant. The two-regime feature of MHT is primarily related to the reduction in tropical clouds and increase in tropical

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Yin, Yanjie, Hui Chen, Xiaoyi Yang, and Shuang He. "Investigation of porosity in rotating laser-MIG hybrid welding A6N01 aluminum alloy." International Journal of Modern Physics B 33, no. 01n03 (2019): 1940029. http://dx.doi.org/10.1142/s0217979219400290.

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In this study, rotating laser was employed to reduce the porosity defect in laser-MIG hybrid welding A6N01 aluminum alloy. The influence of laser rotating frequency and rotating radius on the weld were researched respectively. The images of the molten pool were acquired by the high-speed camera, and X-ray images of the weld were calculated by binarization. The result shows that rotating laser-MIG hybrid welding has a dramatic effect on suppressing the generation of porosity, which indicates the possibility to obtain the A6N01 aluminum alloy weld with few pores. With proper parameters about rot

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Chavanne, Cédric P., Eric Firing та François Ascani. "Inertial Oscillations in Geostrophic Flow: Is the Inertial Frequency Shifted by ζ/2 or by ζ?" Journal of Physical Oceanography 42, № 5 (2012): 884–88. http://dx.doi.org/10.1175/jpo-d-12-031.1.

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Abstract The short answer to the question posed in the title is that it depends on the frame of reference chosen to describe the motions. In the inertial limit, the frequency in a rotating frame of reference corresponds to the rotation rate of the inertial current vectors relative to that frame. When described in a reference frame rotating with a geostrophic flow having a relative vertical vorticity ζ, inertial oscillations have a frequency f + ζ, equal to twice the fluid’s rotation rate around the local vertical axis. From a nonrotating frame of reference, one would measure only half this fre

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Zhang, Qingqing, and Zhiqiang Wan. "Design of an Intelligent Lifting Display Cabinet." Highlights in Science, Engineering and Technology 35 (April 11, 2023): 122–26. http://dx.doi.org/10.54097/hset.v35i.7043.

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An intelligent lifting display cabinet is designed, which includes an upper cabinet body, a lower cabinet body is connected under the upper cabinet body, a first motor is arranged on the side of the lower cabinet body, a taking groove is arranged on the upper cabinet body, a cavity is arranged in the lower cabinet body, the lower cabinet body includes a rotating transmission component, the first motor is connected with the rotating transmission component, a driving opening component is engaged on the rotating transmission component, and a rising rotation component is connected on the rotating

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Gondek-Rosińska, D., P. Haensel, J. L. Zdunik, and E. Gourgoulhon. "Rapidly rotating strange stars." International Astronomical Union Colloquium 177 (2000): 661–62. http://dx.doi.org/10.1017/s0252921100060930.

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AbstractWe study effects of the strange quark mass,ms, and of the QCD interactions, calculated to lowest order inαc, on the rapid rotation of strange stars (SS). The influence of rotation on global parameters of SS is greater than in the case of the neutron stars (NS). We show that independently ofmsandαcthe ratio of the rotational kinetic energy to the absolute value of the gravitational potential energyT/Wfor a rotating SS is significantly higher than for an ordinary NS. This might indicate that rapidly rotating SS could be important sources of gravitational waves.

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Zhao, Changying, Shupeng Sun, Lagouge Tartibu, and Hesheng Han. "Traveling wave vibration characteristics of rotating FGM conical shell." Journal of Physics: Conference Series 2882, no. 1 (2024): 012053. http://dx.doi.org/10.1088/1742-6596/2882/1/012053.

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Abstract Conical shell is common structural component in various rotating machinery. The study of traveling wave vibration performance of conical shell is of great significant for the design of rotating machinery. This paper addresses the traveling wave vibration performance of rotating functionally graded material (FGM) conical shells. Artificial springs, uniformly distributed, are employed to simulate the boundary constraints of rotating FGM conical shell. Accounting for the effects of Coriolis and centrifugal forces caused by rotation, the energy equation of rotating FGM conical shell is ca

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Rüdiger, G., M. Küker, P. J. Käpylä, and K. G. Strassmeier. "Antisolar differential rotation of slowly rotating cool stars." Astronomy & Astrophysics 630 (September 30, 2019): A109. http://dx.doi.org/10.1051/0004-6361/201935280.

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Rotating stellar convection transports angular momentum towards the equator, generating the characteristic equatorial acceleration of the solar rotation while the radial flux of angular momentum is always inwards. New numerical box simulations for the meridional cross-correlation ⟨uθuϕ⟩, however, reveal the angular momentum transport towards the poles for slow rotation and towards the equator for fast rotation. The explanation is that for slow rotation a negative radial gradient of the angular velocity always appears, which in combination with a so-far neglected rotation-induced off-diagonal e

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JULIEN, KEITH, SONYA LEGG, JAMES McWILLIAMS, and JOSEPH WERNE. "Plumes in rotating convection. Part 1. Ensemble statistics and dynamical balances." Journal of Fluid Mechanics 391 (July 25, 1999): 151–87. http://dx.doi.org/10.1017/s0022112099005236.

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Atmospheric and oceanic convection often occurs over areas occupied by many localized circulation elements known as plumes. The convective transports therefore may depend not only on the individual elements, but also on the interactions between plumes and the turbulent environment created by other plumes. However, many attempts to understand these plumes focus on individual isolated elements, and the behaviour of an ensemble is not understood. Geophysical convection may be influenced by rotation when the transit time of a convecting element is long compared to an inertial period (for example i

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Fujisawa, Kotaro, and Yu Yamamoto. "Equilibrium structures of rapidly rotating stars with shellular rotation." Proceedings of the International Astronomical Union 12, S329 (2016): 398. http://dx.doi.org/10.1017/s1743921317001314.

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AbstractWe have developed a new numerical method for obtaining self-consistent structures of rapidly rotating stars. We obtained self-consistent equilibrium structures of rapidly rotating massive stars with shellular rotation by using the method. These equilibrium structures might be useful for both evolution of rapidly rotating massive stars and progenitor models of core-collapse supernovae simulations.

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Wong, K. W. L., J. Zhao, D. Lo Jacono, M. C. Thompson, and J. Sheridan. "Experimental investigation of flow-induced vibration of a rotating circular cylinder." Journal of Fluid Mechanics 829 (September 21, 2017): 486–511. http://dx.doi.org/10.1017/jfm.2017.540.

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While flow-induced vibration of bluff bodies has been extensively studied over the last half-century, only limited attention has been given to flow-induced vibration of elastically mounted rotating cylinders. Since recent low-Reynolds-number numerical work suggests that rotation can enhance or suppress the natural oscillatory response, the former could find applications in energy harvesting and the latter in vibration control. The present experimental investigation characterises the dynamic response and wake structure of a rotating circular cylinder undergoing vortex-induced vibration at a low

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