نتایج جستجو برای: flux limiter

تعداد نتایج: 109343  

2008
O. Cohen I. V. Sokolov I. I. Roussev N. Lugaz W. B. Manchester T. I. Gombosi C. N. Arge

We simulate the May 12, 1997 space weather event from the Sun to the Earth. The initiation of the coronal mass ejection (CME) was done by superimposing a semi-circular, out-of-equilibrium magnetic flux rope onto a semi-empirical, steadystate solar corona model (SCM). The result at 1AU was obtained by coupling the SCM with an inner heliosphere model (IHM). Our results demonstrate that the CME pa...

2001
David B. Cline

We describe the Neutrino Spectrum and detection for SN II sources. We discuss the effects of neutrino mixing in the SN II. A new analysis of SN1987A is described. We discuss the possible detection of the diffuse relic SN II flux. Finally we discuss a new detection concept, OMNIS, for and and detection and compare with μ 2 other present and future SN detectors.

2008
Roberto Aloisio Francesco Tortorici

Super Heavy quasi-stable particles are naturally produced in the early universe and could represent a substantial fraction of the Dark Matter: the so-called Super Heavy Dark Matter (SHDM). The decay of SHDM represents also a possible source of Ultra High Energy Cosmic Rays (UHECR), with a reliably calculated spectrum of the particles produced in the decay (∝ E−1.9). The SHDM model for the produ...

2001
Roberto Aparicio Ali Hajimiri

Theoretical limits for the capacitance density of lateral flux and quasi-fractal capacitors are calculated. These limits are used to investigate the efficiency of various capacitive structures such as lateral flux and quasi-fractal structures. This study leads to two new capacitor structures with high lateralfield efficiency. Simulation and experimental results demonstrate higher capacity and s...

2004
A. Lee G. W. Schade A. H. Goldstein

A comparison of new measurements of total monoterpene flux with improved measurements of speciated monoterpene flux A. Lee, G. W. Schade, R. Holzinger, and A. H. Goldstein Department of Environmental Science, Policy, and Management, University of California, Berkeley, 151 Hilgard Hall # 3110, Berkeley, CA 94720-3110, USA Institute of Environmental Physics, University of Bremen, NW1, Otto-Hahn-A...

2006
C. Mazzotta V. Pericoli Ridolfini V. Lazarev A. Alekseyev A. Vertkov R. Zagórski

The experimental results of the use of a liquid lithium limiter on FTU are presented. To avoid droplet generation by JxB forces we have adopted a limiter with a capillary porous system configuration. Lithization of the vacuum vessel is performed by exposing lithium limiter to the plasma boundary for three subsequent plasma discharges after that it is extracted. Strong reduction of the recycling...

Journal: :Numerische Mathematik 2010
Raimund Bürger Kenneth H. Karlsen Héctor Torres John D. Towers

Continuously operated clarifier-thickener units can be modeled by a non-linear, scalar conservation law with a flux that involves two parameters that depend discontinuously on the space variable. This paper presents two numerical schemes for the solution of this equation that have formal second-order accuracy in both the time and space variable. One of the schemes is a standard total variation ...

2003
E. D. Held J. D. Callen C. C. Hegna

In this work a general closure for the conductive electron heat flux parallel to an inhomogeneous magnetic field is derived and examined. Free-streaming and collisional effects are present in the drift kinetic equation which is solved using an expansion of eigenfunctions of the bounce-averaged, pitch-angle scattering operator. For bounce times short compared to transit and collision times, the ...

2013
Manjunath Prasad

Direct Torque Control (DTC) of Induction Motor drive has quick torque response without complex orientation transformation and inner loop current control. DTC has some drawbacks, such as the torque and flux ripple. The control scheme performance relies on the accurate selection of the switching voltage vector. This proposed simple structured neural network based new identification method for flu...

2001
M. Brio A. R. Zakharian G. M. Webb

We construct a Riemann solver based on two-dimensional linear wave contributions to the numerical flux that generalizes the one-dimensional method due to Roe (1981, J. Comput. Phys. 43, 157). The solver is based on a multistate Riemann problem and is suitable for arbitrary triangular grids or any other finite volume tessellations of the plane. We present numerical examples illustrating the perf...

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