scholarly journals Self-consistent kinetic numerical simulation model for ring current particles in the Earth's inner magnetosphere

2011 ◽  
Vol 116 (A2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Takanobu Amano ◽  
Kanako Seki ◽  
Yoshizumi Miyoshi ◽  
Takayuki Umeda ◽  
Yosuke Matsumoto ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Ring Current ◽  
Inner Magnetosphere ◽  
Self Consistent

scholarly journals Dynamics Geomagnetic Storm on 7–10 September 2015 as Observed by TWINS and Simulated by CIMI

2018 ◽  
Author(s):  
Joseph D. Perez ◽  
James Edmond ◽  
Shannon Hill ◽  
Hanyun Xu ◽  
Natalia Buzulukova ◽  
...  
Keyword(s):  
Ring Current ◽  
Magnetic Shielding ◽  
Inner Magnetosphere ◽  
Pressure Distributions ◽  
Global View ◽  
Ae Index ◽  
Self Consistent ◽  
Night Side ◽  
Electric Potentials ◽  
First Time

Abstract. For the first time, direct comparisons of the equatorial ion pressure and pitch angle anisotropy observed by TWINS and simulated by CIMI are presented. The TWINS ENA images are from a 4-day period, 7–10 September 2015. The simulations use both the empirical Weimer 2K and the self-consistent RCM electric potentials. There are two moderate storms in succession during this period. In most cases, we find that the general features of the ring current in the inner magnetosphere obtained from the observations and the simulations are similar. Nevertheless, we do see consistent indications of enhanced electric and magnetic shielding in the TWINS observations. The simulated pressure peaks are often inside the observed peaks and more toward dusk than the measured values. There are also cases in which the measured equatorial ion pressure shows multiple peaks that are not seen in the simulations. This occurs during a period of intense AE index, suggesting time and spatially dependent injections from the plasma sheet that are not included in these simulations. The simulations consistently show regions of parallel anisotropy spanning the night side between approximately 6 and 8 RE whereas the parallel anisotropy is seen in the observations only during the main phase of the first storm. This may indicate stronger electric and magnetic shielding than is present in the simulations. The evidence form the unique global view provided by the TWIN observations strongly suggests that there are features in the ring current pressure distributions that can be best explained by enhanced electric and magnetic shielding and/or spatially-localized, short-duration injections..

Fundamental Examination of Numerical Simulation Model for Pressure Rise due to Underwater Arc

2014 ◽  
Vol 134 (7) ◽  
pp. 604-613 ◽  
Author(s):  
Toshiya Ohtaka ◽  
Tomo Tadokoro ◽  
Masashi Kotari ◽  
Tadashi Amakawa
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Pressure Rise

Evaluation of an improvement in runoff control by means of a construction of an infiltration sewer pipe under a porous asphalt pavement

1997 ◽  
Vol 36 (8-9) ◽  
pp. 397-402
Author(s):  
Yasuhiko Wada ◽  
Hiroyuki Miura ◽  
Rituo Tada ◽  
Yasuo Kodaka
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Asphalt Pavement ◽  
Considerable Effect ◽  
Rainfall Infiltration ◽  
Sewer Pipe ◽  
Porous Asphalt ◽  
Runoff Control

We examined the possibility of improved runoff control in a porous asphalt pavement by installing beneath it an infiltration pipe with a numerical simulation model that can simulate rainfall infiltration and runoff at the porous asphalt pavement. From the results of simulations about runoff and infiltration at the porous asphalt pavement, it became clear that putting a pipe under the porous asphalt pavement had considerable effect, especially during the latter part of the rainfall.

scholarly journals Study on the regional characteristics during foam flooding by population balance model

2020 ◽  
pp. 014459872098361
Author(s):  
Zhongbao Wu ◽  
Qingjun Du ◽  
Bei Wei ◽  
Jian Hou
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Oil Recovery ◽  
Population Balance ◽  
Growth Zone ◽  
Balance Model ◽  
Population Balance Model ◽  
Liquid Ratio ◽  
One Dimensional ◽  
Foam Flooding

Foam flooding is an effective method for enhancing oil recovery in high water-cut reservoirs and unconventional reservoirs. It is a dynamic process that includes foam generation and coalescence when foam flows through porous media. In this study, a foam flooding simulation model was established based on the population balance model. The stabilizing effect of the polymer and the coalescence characteristics when foam encounters oil were considered. The numerical simulation model was fitted and verified through a one-dimensional displacement experiment. The pressure difference across the sand pack in single foam flooding and polymer-enhanced foam flooding both agree well with the simulation results. Based on the numerical simulation, the foam distribution characteristics in different cases were studied. The results show that there are three zones during foam flooding: the foam growth zone, stable zone, and decay zone. These characteristics are mainly influenced by the adsorption of surfactant, the gas–liquid ratio, the injection rate, and the injection scheme. The oil recovery of polymer-enhanced foam flooding is estimated to be 5.85% more than that of single foam flooding. Moreover, the growth zone and decay zone in three dimensions are considerably wider than in the one-dimensional model. In addition, the slug volume influences the oil recovery the most in the foam enhanced foam flooding, followed by the oil viscosity and gas-liquid ratio. The established model can describe the dynamic change process of foam, and can thus track the foam distribution underground and aid in optimization of the injection strategies during foam flooding.

scholarly journals Numerical Simulation Model for Granulation Kinetics of Iron Ores

2005 ◽  
Vol 45 (4) ◽  
pp. 500-505 ◽  
Author(s):  
Junya KANO ◽  
Eiki KASAI ◽  
Fumio SAITO ◽  
Takazo KAWAGUCHI
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Iron Ores ◽  
Kinetics Of

Numerical simulation model for exhaust gas transportation of dust in the BOF

1995 ◽  
Vol 66 (8) ◽  
pp. 341-348 ◽  
Author(s):  
Champion Chigwedu ◽  
Jens Kempken ◽  
Andreas Ploch ◽  
Wolfgang Pluschkell
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Exhaust Gas
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