標(biāo)題: Titlebook: Dynamo and Dynamics, a Mathematical Challenge; P. Chossat,D. Ambruster,I. Oprea (Faculty of Mathe Book 2001 Springer Science+Business Medi [打印本頁] 作者: Coolidge 時間: 2025-3-21 20:02
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書目名稱Dynamo and Dynamics, a Mathematical Challenge讀者反饋學(xué)科排名
作者: garrulous 時間: 2025-3-21 20:27 作者: 上釉彩 時間: 2025-3-22 03:08
Saturation of a Ponomarenko Type Fluid Dynamoproach exists only when the magnetic neutral modes grow at large scale. It has been shown that the role of turbulent fluctuations may be twofold: on one hand, they decrease the effective electrical conductivity and thus inhibits dynamo action by increasing Joule dissipation. On the other hand, they 作者: 不可接觸 時間: 2025-3-22 08:11
Convection Driven Dynamos in Rotating Spherical Fluid Shellsthe magnetic diffusivity since the magnetic Reynolds number may not be larger than a few hundreds which can be easily accommodated in numerical simulations. Since dynamical processes often depend sensitively on the ratio of diffusivities, the fact that numerical simulations of the geodynamo have not作者: unstable-angina 時間: 2025-3-22 09:37 作者: ZEST 時間: 2025-3-22 16:40 作者: ZEST 時間: 2025-3-22 19:35
https://doi.org/10.1007/978-3-642-20450-0the magnetic diffusivity since the magnetic Reynolds number may not be larger than a few hundreds which can be easily accommodated in numerical simulations. Since dynamical processes often depend sensitively on the ratio of diffusivities, the fact that numerical simulations of the geodynamo have not作者: 高調(diào) 時間: 2025-3-23 00:35
Book 2001 dynamos, the self-generation of a magnetic field by a flow ofliquid sodium has been reported by the Karlsruhe and Riga groups. Although there were no doubts concerning the self generation by the laminar Roberts-type or Ponomarenko-type flows that were used, these experiments have raised interesting作者: 媽媽不開心 時間: 2025-3-23 04:50
1568-2609 re were no doubts concerning the self generation by the laminar Roberts-type or Ponomarenko-type flows that were used, these experiments have raised interesting978-0-7923-7070-3978-94-010-0788-7Series ISSN 1568-2609 作者: 愛社交 時間: 2025-3-23 06:48 作者: 狼群 時間: 2025-3-23 13:33
Sheared Helical Turbulence and the Helicity Constraint in Large-Scale Dynamosity conservation. Because of shear, the time scale needed to reach an equipartition-strength large scale field is shortened proportionally to the ratio of the resulting toroidal to poloidal large scale fields.作者: acrobat 時間: 2025-3-23 17:52 作者: GRIPE 時間: 2025-3-23 21:15
Small- and Large-Scale Dynamo Action in Simple Forced Flows (mean) field and measure the associated α-effect. We find that a significant non-zero α-effect can exist, indicating possible dynamo action on scales larger than the velocity scale, when sometimes no dynamo action exists at the velocity scale itself. Flows exist which are not small-scale dynamos, yet may be large-scale dynamos.作者: 靈敏 時間: 2025-3-23 22:10
Detaillierung der Handlungsfelder, broken by introducing a scale separation in the flow, or by letting develop a small non-symmetric perturbation which can be either kinetic and magnetic, or only magnetic [.]. We present cases where a long term magnetic field produced by dynamo action saturates. Implications of our results to VK sodium experiments are discussed.作者: tympanometry 時間: 2025-3-24 04:32
https://doi.org/10.1007/978-3-642-18962-3ld. To get closer to the real MHD problems, new designs of experimental devices and new numerical codes are needed in order to achieve greater Rm, study the turbulent characteristics, the nonlinear saturation regime and the influence of large-scale flow configuration and boundaries.作者: Fraudulent 時間: 2025-3-24 07:10 作者: Genome 時間: 2025-3-24 13:38 作者: Musket 時間: 2025-3-24 15:08 作者: helper-T-cells 時間: 2025-3-24 22:26
Preliminary Measurement of the Turbulent Magnetic Diffusivity in Three Dimensionsn energy are required in order to suppress the effective turbulent diffusion. In order to elucidate this question we performed numerical calculations based on the full, incompressible MHD equations, that allow us to measure the effective magnetic diffusivity for different values of the large-scale magnetic field strength.作者: HERTZ 時間: 2025-3-25 02:30 作者: 斜坡 時間: 2025-3-25 06:00
Wound ballistics and forensic medicine,dynamo problem has been limited to analytic calculations, numerical modelling and observational studies; experimental validation (the critical test for any theory) of aspects of the theory and experimental studies of laboratory dynamos have been scarce.作者: CT-angiography 時間: 2025-3-25 08:15 作者: 紡織品 時間: 2025-3-25 15:12
https://doi.org/10.1007/978-3-642-20447-0al-symmetric flow is calculated on a staggered grid with a finite-volume method. The conjugate-gradient method with a preconditioner accelerates the approximation. In azimuthal direction a spectral analysis allows a three-dimensional simulation for spherical shells with a wide gap.作者: Fibrillation 時間: 2025-3-25 19:04 作者: 折磨 時間: 2025-3-25 20:14
On the Possibility of an Homogeneous MHD Dynamo in the Laboratorydynamo problem has been limited to analytic calculations, numerical modelling and observational studies; experimental validation (the critical test for any theory) of aspects of the theory and experimental studies of laboratory dynamos have been scarce.作者: 在前面 時間: 2025-3-26 00:07
Dynamo Action Due to Ekman Layer Instability number .* defined using the Ekman layer thickness, exceeds the experimentally measured value of .*. ? (or 124.5 for type I). We will focus on the type II travelling wave, which has the smaller critical Reynolds number and so is easier to study numerically.作者: Nibble 時間: 2025-3-26 07:38 作者: Engaged 時間: 2025-3-26 08:52
Saturation Mechanism in a Model of the Karlsruhe Dynamovations show however that volumetric flow rates continue to increase as a function of the applied pressure even when a steady dynamo field is present, which indicates that the velocity profile inside individual spin generators changes in response to the magnetic field.作者: Kernel 時間: 2025-3-26 13:17 作者: prediabetes 時間: 2025-3-26 19:36
https://doi.org/10.1007/978-3-642-18962-3g the abrupt brake. Internal diverters will enable the required profile of velocity. The expected flow can act as a dynamo provided its magnetic Reynolds .. number is expected to exceed several tens. The experiment is developing in the Institute of Continuous Media Mechanics of Ural Branch of Russian Academy of Sciences, Perm, Russia.作者: 摸索 時間: 2025-3-26 21:54 作者: 他姓手中拿著 時間: 2025-3-27 03:26 作者: Epithelium 時間: 2025-3-27 08:49 作者: 表皮 時間: 2025-3-27 11:33 作者: 收到 時間: 2025-3-27 13:59 作者: 定點 時間: 2025-3-27 19:01
Riga Dynamo Experimenthomogeneous electroconducting fluid of celestial bodies. Such are fields of the Earth, most of the planets, Sun, another stars and even galaxies. The believe is based on the theory and numerical simulation. Until very recently no direct laboratory experiment was supporting this important point.作者: PHONE 時間: 2025-3-27 21:58 作者: AVANT 時間: 2025-3-28 02:59
Hunting For Dynamos: Eight Different Liquid Sodium Flowsld a dynamo? We present eight variations of a flow motivated by the s2t2 flow numerically studied by Dudley and James [.]. Pulse decay measurements of an externally applied magnetic field are used to quantify the approach to transition to dynamo action.作者: 不近人情 時間: 2025-3-28 06:30
Rotating Magnetoconvection in Dependence on Stratification, Diffusive Processes and Boundary Conditiagnetic field (1b) were investigated in dependence on Elsasser, Ekman, Roberts numbers and stratification parameter (7) for various mechanical and electrically conductive boundaries (8, 9). Among corresponding MC-waves the westward ones significantly determined by viscosity were revealed.作者: 減弱不好 時間: 2025-3-28 10:54
Dynamo and Dynamics, a Mathematical Challenge978-94-010-0788-7Series ISSN 1568-2609 作者: 珠寶 時間: 2025-3-28 14:51
https://doi.org/10.1007/978-3-642-18962-3homogeneous electroconducting fluid of celestial bodies. Such are fields of the Earth, most of the planets, Sun, another stars and even galaxies. The believe is based on the theory and numerical simulation. Until very recently no direct laboratory experiment was supporting this important point.作者: 同位素 時間: 2025-3-28 20:13
https://doi.org/10.1007/978-3-642-18962-3tion .) which follows from Maxwell equations and Ohm’s law. The solution . = 0 may become unstable for some critical value Re. of the magnetic Reynolds number, .) . and . being respectively typical length and velocity scales.作者: Coeval 時間: 2025-3-28 23:23 作者: Flavouring 時間: 2025-3-29 05:04
Federico Trucco,Patrick J. Tranelagnetic field (1b) were investigated in dependence on Elsasser, Ekman, Roberts numbers and stratification parameter (7) for various mechanical and electrically conductive boundaries (8, 9). Among corresponding MC-waves the westward ones significantly determined by viscosity were revealed.作者: commensurate 時間: 2025-3-29 10:12
https://doi.org/10.1007/978-94-010-0788-7Magnetohydrodynamics; convection; linear optimization; model; simulation; fluid- and aerodynamics作者: Bravado 時間: 2025-3-29 11:41
978-0-7923-7070-3Springer Science+Business Media Dordrecht 2001作者: Endemic 時間: 2025-3-29 17:01 作者: GROSS 時間: 2025-3-29 22:57 作者: 鳥籠 時間: 2025-3-30 00:39 作者: Palpable 時間: 2025-3-30 05:49
https://doi.org/10.1007/978-3-642-18962-3 at magnetic Reynolds numbers R. greater than a few tens. While the first numerical evidence of this phenomenon has been obtained since almost 45 years, it was only at the end of the year 1999 that it could be experimentally verified in liquid sodium flows. There is still a great gap between such ex作者: Estimable 時間: 2025-3-30 08:35 作者: 自由職業(yè)者 時間: 2025-3-30 16:09 作者: 疼死我了 時間: 2025-3-30 17:09 作者: 詞匯記憶方法 時間: 2025-3-30 20:55
Jaya R. Soneji,Madhugiri Nageswara Raot [., ., ., .] and more realistic geometries can be easily studied numerically [6]. However, most flows of liquid metal are fully turbulent before reaching the dynamo threshold: indeed, the magnetic Prandtl number, . = μ.σν, where μ. is the magnetic permeability of vacuum, σ is the electric conducti作者: gait-cycle 時間: 2025-3-31 03:12
https://doi.org/10.1007/978-3-642-20447-0instability has been studied experimentally by Faller [.] and Caldwell & Van Atta [.], and numerically by Faller & Kaylor [.] , Lilly [.], Melander [.] and Ponty et al. [.]. The linear and nonlinear behaviour of Ekman- Couette instabilities in a plane layer has been discussed by Hoffmann et al. [.].作者: defile 時間: 2025-3-31 07:33
Jaya R. Soneji,Madhugiri Nageswara Raold a dynamo? We present eight variations of a flow motivated by the s2t2 flow numerically studied by Dudley and James [.]. Pulse decay measurements of an externally applied magnetic field are used to quantify the approach to transition to dynamo action.作者: Acupressure 時間: 2025-3-31 12:39
https://doi.org/10.1007/978-3-642-20447-0 magnetic field, the dielectrophoretic force can be used to produce a central force field under microgravity conditions. In a space experiment, currently under construction, thermal convection in a rotating spherical gap with heated inner sphere and cooled outer sphere will be visualized by a Wollas作者: 積云 時間: 2025-3-31 17:21 作者: 榨取 時間: 2025-3-31 20:38 作者: Virtues 時間: 2025-4-1 00:28 作者: 緯度 時間: 2025-4-1 04:35
Yukio Kaneko,Sang Woo Bang,Yasuo Matsuzawagnetic helicity and the α-effect. In simulations of such flows the maximum field strength exceeds the equipartition field strength for large scale separation. However, helicity conservation controls the speed at which this final state is reached. In the presence of open boundaries magnetic helicity 作者: defenses 時間: 2025-4-1 07:10 作者: 裂隙 時間: 2025-4-1 13:18 作者: DOTE 時間: 2025-4-1 18:06
