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11.
M. V. Klimenko V. V. Klimenko K. G. Ratovskii L. P. Goncharenko 《Russian Journal of Physical Chemistry B, Focus on Physics》2011,5(3):377-386
Previously, we studied the ionospheric effects of the sequence of geomagnetic storms on September 9–14, 2005 using a global
self-consistent model “Thermosphere-Ionosphere-Protonosphere” (GSM TIP). Differences between the predicted and observed effects
of the ionospheric storms may be due to the use of the three-hour K
p
index of geomagnetic activity in modeling the time dependence of model input parameters, use of the dipole approximation
of the geomagnetic field, and disregard in simulations for solar flares that occurred during this period. We tried to eliminate
two of these three reasons. First, we used the A
E
index of geomagnetic activity with minute resolution in modeling the time dependence of the model input parameters. Second,
we took into account the effects of solar flares. In addition, GSM TIP model was supplemented by an empirical model describing
the precipitation of high-energy electrons. The results of the simulation of the behavior of various ionospheric parameters
over the Yakutsk, Irkutsk, Millstone Hill, and Arecibo stations on September 9 and 10, 2005 in the new formulation of the
problem, presented in the current work, are in better agreement with the available experimental data than the results of previous
calculations. 相似文献
12.
B. Amaziane M. Goncharenko L. Pankratov 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》2007,123(5):592-611
The aim of this paper is to study the asymptotic behavior of the solution of a convection–diffusion equation in perforated
domains with oscillating velocity and a Robin boundary condition which describes the adsorption on the bord of the obstacles.
Without any periodicity assumption, for a large range of perforated media and by mean of variational homogenization, we find
the global behavior when the characteristic size ε of the perforations tends to zero. The homogenized model, is a convection–diffusion
equation but with an extra term coming from the weak adsorption boundary condition. An example is presented to illustrate
the methodology. 相似文献
13.
V. I. Goncharenko 《International Applied Mechanics》1990,26(4):385-390
Kiev. Translated from Prikladnaya Mekhanika, Vol. 26, No. 4, pp. 79–85, April, 1990. 相似文献
14.
15.
V. A. Goncharenko 《International Applied Mechanics》2002,38(5):635-640
A physical explanation is given to the mechanism of back coupling of the perturbed motion of a propeller in its plane of rotation and the force in the same plane. This unusual feedback may cause a mechanical system with a propeller to self-excite in the plane of possible oscillations of its axis upon propeller reversal. Instability occurs easier at the resonance of the system when the resultant moment of external forces lags in phase behind the angle of attack by approximately 5/4. 相似文献
16.
A. F. Goncharenko I. V. Nemchinov V. M. Khazins 《Journal of Applied Mechanics and Technical Physics》1976,17(3):313-321
Nonsteady-state gasdynamic processes are considered in a plasma column (hot channel), formed behind the front of a shock wave moving toward a laser beam. A quasi-one-dimensional approximation is used-the parameters in the channel are assumed to be compensated with respect to cross section, but depend on the time and distance along the axis. Motion in the cold dense casing surrounding the channel is assumed to be one-dimensional and cylindrically symmetrical. The solutions of the corresponding systems of equations in partial derivatives permit the parameters to be determined approximately both in the case when the mean free path of the radiation is small in comparison with the radius of the beam (luminous detonation) and also in the case when the mean free path is comparable with the radius. Examples are given of the corresponding numerical calculations. It is shown that in the latter case, a cycle of incomplete absorption can be achieved when behind the shock wave front, moving with constant velocity up to the Jouguet plane, only a part of the radiation energy incident on the front is released.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 3, pp. 18–28, May–June, 1976. 相似文献
17.
We consider an initial boundary-value problem used to describe the nonstationary vibration of an elastic medium with large
number of small cavities filled with a viscous incompressible fluid. We study the asymptotic behavior of the solution in the
case where the diameters of the cavities tend to zero, their number tends to infinity, and the cavities occupy a three-dimensional
region. We construct an averaged equation to describe the leading term of the asymptotics. This equation serves as a model
of propagation of waves in various media, such as damped soil, rocks, and some biological tissues. 相似文献
18.
This work deals with the investigation of dielectric and optical properties of discontinuous metal films over a wide range
of filling factors each side of the percolation threshold. A phenomenological two-parameter representation is used for the
effective permittivity &εtilde; of such systems. In order to test the proposed approach, we have taken for gold films on a
glass substrate the transmittance spectra in the visible and near-IR regions. It is shown that the representation used for
the effective permittivity enables us to adequately describe the experimental transmittance spectra. The parameters entering
the above representation are determined and the relationship between them and film microgeometry is discussed.
Received: 6 November 2000 / Accepted: 30 May 2001 / Published online: 25 July 2001 相似文献
19.
B. N. Goncharenko A. L. Urintsev 《Journal of Applied Mechanics and Technical Physics》1975,16(2):293-296
Using the Navier-Stokes equation the stability of a layer of viscous liquid flowing down a solid surface under gravity is studied in the linear formulation. The effect of surface tension and the inclination of the solid surface on the limits of stability are examined also. Curves are calculated for the neutral stability with respect to two types of perturbations — surface waves and shear waves.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskol Fiziki, No. 2, pp. 172–176, March–April, 1975. 相似文献
20.
A. Ya. Malkin V. V. Goncharenko V. V. Malinovskii 《Mechanics of Composite Materials》1976,12(3):439-444
The determination of the swell factor of a polymer jet extruded from a cylindrical or flat die is examined. Relations are obtained for the dependence of the swell factor on shear rate and shear stress, expressed in terms of the constants of the rheological model.Scientific Research Institute of Plastics, Moscow. Kiev Polytechnic Institute. Translated from Mekhanika Polimerov, No. 3, pp. 487–492, May–June, 1976. 相似文献