作者: Climate 時間: 2025-3-21 21:37 作者: FLASK 時間: 2025-3-22 01:52
Empowerment als Leitlinie Sozialer Arbeittude, and find that the “atmosphere” is exponentialfar enough from the piston. From these three independent measurements, we determine a “state equation” between pressure, volume, particle number and the vibration amplitude and frequency.作者: 音樂等 時間: 2025-3-22 04:42
https://doi.org/10.1007/978-3-476-02972-0. Viscous stability properties are also briefly discussed: examples of both instabilities and overstabilities are given. In this context 2D-simulations are useful, eventhough physically unrealistic even for extremely flattened planetary ring systems.作者: 陶器 時間: 2025-3-22 11:53
Hydrodynamic Transport Coefficients of Granular Gasesdered. Similar analysis is presented for self-diffusion and Brownian motion. In the former case, also Molecular Dynamics results are shown to agree with the theoretical predictions. Quantitative and also qualitative differences with the elastic limit are discussed.作者: 惡名聲 時間: 2025-3-22 15:14 作者: 惡名聲 時間: 2025-3-22 18:10 作者: 令人苦惱 時間: 2025-3-22 22:00
Numerical Simulations of the Collisional Dynamics of Planetary Rings. Viscous stability properties are also briefly discussed: examples of both instabilities and overstabilities are given. In this context 2D-simulations are useful, eventhough physically unrealistic even for extremely flattened planetary ring systems.作者: saphenous-vein 時間: 2025-3-23 03:04 作者: geometrician 時間: 2025-3-23 06:02 作者: 都相信我的話 時間: 2025-3-23 09:52
Rainer Diaz-Bone,Christoph Weischerive behaviour of the grains, and the diflusion coefficient. Positron Emission Particle Tracking has been used to follow the motion of a single grain within an experimental cell, and preliminary measurements of the granular temperature of a dilute three-dimensional granular gas have been made for the first time.作者: SYN 時間: 2025-3-23 16:43 作者: FEMUR 時間: 2025-3-23 18:50
Verein Deutscher Dünger-Fabrikantenthe Langevin theory. We also study the influence of an external random force on the diffusion process for a forced system. In particular, we analyze differences in the mean square velocity and displacement between the elastic and inelastic case.作者: jaunty 時間: 2025-3-24 01:31 作者: integral 時間: 2025-3-24 05:01 作者: 職業(yè)拳擊手 時間: 2025-3-24 09:02
https://doi.org/10.1007/978-3-531-91363-6cles and the driving frequency; in particular, under certain conditions, increasing the layer thickness or the driving frequency leads to a .. The direction of the transport may also depend on the coefficient of restitution. We give a simple explanation for the mechanism responsible for determining the direction of the granular flow.作者: 脫毛 時間: 2025-3-24 11:42
https://doi.org/10.1007/978-3-322-94584-6 are governed by the shock waves propagating across the column; (iii) the averaged kinetic energy per particle is proportionalto .., and it strongly depends on the vibrational amplitude; (iv) the maximalv alue of this kinetic energy pumped by these externalvibrations is of order ...., where . is the tube length作者: 生氣地 時間: 2025-3-24 15:55
Vorbemerkung: Zum Anliegen dieses Bucheslow. As a result the interparticle collisions will tend to increase density gradient, leading to formation of gaps, sharp edges, or narrow ringlets. Numerical 3-dimensional collisional simulations including satellite perturbations can capture the essence of this process.作者: 廚房里面 時間: 2025-3-24 19:24
Diffusion Process in Two-Dimensional Granular Gasesthe Langevin theory. We also study the influence of an external random force on the diffusion process for a forced system. In particular, we analyze differences in the mean square velocity and displacement between the elastic and inelastic case.作者: 固定某物 時間: 2025-3-24 23:22
Energy Loss and Aggregation Processes in Low Speed Collisions of Ice Particles Coated with Frosts orhich sticking contacts have been observed. These results are compared with a few other similar measurements, and with theoretical models for energy loss in collisions. Specific applications to the dynamics of Saturn’s rings and to the formation of planetesimals in the early solar nebula, which motivated these studies, are also discussed.作者: 謙卑 時間: 2025-3-25 03:45 作者: 引導(dǎo) 時間: 2025-3-25 11:16 作者: Carbon-Monoxide 時間: 2025-3-25 12:56 作者: 頂點 時間: 2025-3-25 18:19
Formation of Narrow Ringlets in Saturn’s Ringslow. As a result the interparticle collisions will tend to increase density gradient, leading to formation of gaps, sharp edges, or narrow ringlets. Numerical 3-dimensional collisional simulations including satellite perturbations can capture the essence of this process.作者: 忙碌 時間: 2025-3-25 20:05
Kinetic Theory for 1D Granular Gasesequation. We find that for low dissipative regimes, there is excellent agreement between our theoretical predictions for the macroscopic fields, and the measurementes from molecular dynamics simulations.作者: Anthropoid 時間: 2025-3-26 01:51 作者: 放大 時間: 2025-3-26 07:31 作者: Aqueous-Humor 時間: 2025-3-26 10:06 作者: 迫擊炮 時間: 2025-3-26 16:36 作者: 輕而薄 時間: 2025-3-26 19:13
Free Cooling of Particles with Rotational Degrees of Freedom the homogeneous state as well as large-scale structures in the velocity field. We study non-Gaussian distributions of the momenta perturbatively and observe a breakdown of the expansion for particular values of surface roughness and normal restitution.作者: Pamphlet 時間: 2025-3-26 21:23 作者: 流眼淚 時間: 2025-3-27 02:58 作者: Cacophonous 時間: 2025-3-27 08:42 作者: Adrenaline 時間: 2025-3-27 11:15 作者: grovel 時間: 2025-3-27 14:15
Granular Gases978-3-540-44506-7Series ISSN 0075-8450 Series E-ISSN 1616-6361 作者: doxazosin 時間: 2025-3-27 21:14 作者: 事先無準(zhǔn)備 時間: 2025-3-28 01:20 作者: backdrop 時間: 2025-3-28 03:24
Boundary Conditions for Collisional Grain Flows at Bumpy, Frictional Walls bumpy, frictional boundaries with either cylindrical or spherical bumps. We illustrate their use by solving for the profiles of fluctuation velocity, mean velocity, and volume fraction in steady, fully developed shearing flows between boundaries with frictional, cylindrical features.作者: canvass 時間: 2025-3-28 10:21 作者: 嘮叨 時間: 2025-3-28 12:45 作者: 共同生活 時間: 2025-3-28 14:37
Modellbildung: Ein iterativer Prozess,surface roughness for spherical grains, but occurs for non-spherical grains, like needles, even if they are perfectly smooth. Based on the assumption of a homogeneous cooling state, we derive an approximate analytical theory. It predicts that cooling of both rough spheres and smooth needles proceeds作者: GRUEL 時間: 2025-3-28 20:45 作者: 確定無疑 時間: 2025-3-28 23:00 作者: Rheumatologist 時間: 2025-3-29 04:10 作者: Inelasticity 時間: 2025-3-29 10:18 作者: 險代理人 時間: 2025-3-29 13:15 作者: Immunoglobulin 時間: 2025-3-29 18:23
Hans-Ernst Schwiete,Claus Metzgerology. In this paper we review our measurements of the coefficient of restitution in low speed collisions for a variety of surface coatings, for speeds in the range 0.01- 2 cm/s, and also the investigations of sticking forces (under both dynamic and static conditions), including the conditions for w作者: Glower 時間: 2025-3-29 23:41
Statistische Analyse der Bearbeitungszeiten,teractions between elastic and elastic-perfectly plastic spheres are discussed. For elastic-perfectly plastic spheres an analytical solution for the normal coefficient of resitution is presented which is velocity dependent. The predicted rebound kinematics for oblique impacts of elastic spheres are 作者: 方便 時間: 2025-3-30 00:51 作者: EWER 時間: 2025-3-30 08:02
MITO-Methoden-Anwendungsbeispiele,articles of the chain to assure maximalenergy transfer? The results are compared with a chain of particles for which a constant coefficient of restitution is assumed. Our simple example shows that the assumption of viscoelastic particle properties has not only important consequences for very large s作者: 谷物 時間: 2025-3-30 11:09
Rainer Diaz-Bone,Christoph Weischero characterize the kinetic energy of the grains. Further tests of the analogy with gas kinetic theory have resulted in investigations into the collective behaviour of the grains, and the diflusion coefficient. Positron Emission Particle Tracking has been used to follow the motion of a single grain w作者: 走調(diào) 時間: 2025-3-30 13:56 作者: bronchodilator 時間: 2025-3-30 17:48 作者: 祝賀 時間: 2025-3-30 22:01
https://doi.org/10.1007/978-3-531-91363-6 Molecular Dynamics simulations to explore the horizontal transport of granular particles in a vertically vibrated system whose base has a sawtooth-shaped profile. The resulting transport of the granular material exhibits novel collective behavior, both as a function of the number of layers of parti作者: embolus 時間: 2025-3-31 01:54
https://doi.org/10.1007/978-3-322-94584-6sed tube. The main feature of this phenomenon, predicted by a hydrodynamic model and confirmed by computer simulations, are: (i) a column of a granular gas oscillates periodically with the frequency ., where . is the vibrationalfrequency, . is a positive integer number, (ii) the oscillation patterns作者: Synapse 時間: 2025-3-31 06:17
https://doi.org/10.1007/978-3-8349-9420-2on since centuries. So far, however, neither the detailled mechanisms of formation of planetary rings nor their complex spatial and dynamic behavior, originating from inelastic particle collisions, resonances, gravitational perturbations and others, are completely understood. We give a review on the作者: GIBE 時間: 2025-3-31 13:01
https://doi.org/10.1007/978-3-476-02972-0ation cell with periodic boundary conditions. Various factors affecting the local balance between collisional dissipation and viscous gain of energy from the systematic velocity field are considered, including gravitational encounters and collective gravitational forces besides physical impacts. Sim作者: Platelet 時間: 2025-3-31 15:13
Vorbemerkung: Zum Anliegen dieses Buchesicles and the satellite can be described with small integer numbers (e.g. 2:1, 4:3). In these locations the collisionally induced outward flow of the angular momentum is perturbed by the satellite. In some cases the perturbations may be strong enough to change the direction of the angular momentum f作者: 詞匯記憶方法 時間: 2025-3-31 20:54 作者: 偉大 時間: 2025-3-31 23:25
Free Cooling of Particles with Rotational Degrees of Freedomsurface roughness for spherical grains, but occurs for non-spherical grains, like needles, even if they are perfectly smooth. Based on the assumption of a homogeneous cooling state, we derive an approximate analytical theory. It predicts that cooling of both rough spheres and smooth needles proceeds作者: 啞巴 時間: 2025-4-1 04:49
Hydrodynamic Transport Coefficients of Granular Gasess to Navier-Stokes order are presented. The equations are derived by means of the Chapman-Enskog procedure. To test the existence of a normal solution and the possibility of a hydrodynamic description, the theoretical predictions are compared with numerical simulations of the underlying kinetic equa作者: deactivate 時間: 2025-4-1 08:54
Granular Gases: Probing the Boundaries of Hydrodynamicses in the “continuum transition regime” (where shear rates and/or thermalgradien ts are very large). The following properties of granular gases support the above claim: (i) Mean free times are of the same order as macroscopic time scales. (ii) Mean free paths can be macroscopic and comparable to the作者: 證實 時間: 2025-4-1 13:13
Granular Gases with Impact-Velocity-Dependent Restitution Coefficientthat these conditions are not consistent with known collision laws. From the generalization of the Hertz contact law for viscoelastic particles we obtain the coefficient of normal restitution ∈ as a function of the normal component of the impact velocity ν.. Using ∈(ν.) we describe the time evolutio作者: flex336 時間: 2025-4-1 18:25 作者: 好忠告人 時間: 2025-4-1 21:56
Diffusion Process in Two-Dimensional Granular Gasese. With periodic boundary conditions, the coefficient of diffusion is found to depend on the system size and does not saturate for large systems, which is of course not physical. The problem is solved by using reflecting boundaries. In that case, we find good agreement between numerical results and 作者: 營養(yǎng) 時間: 2025-4-2 02:23
Energy Loss and Aggregation Processes in Low Speed Collisions of Ice Particles Coated with Frosts orology. In this paper we review our measurements of the coefficient of restitution in low speed collisions for a variety of surface coatings, for speeds in the range 0.01- 2 cm/s, and also the investigations of sticking forces (under both dynamic and static conditions), including the conditions for w
