Numerical simulation model of compositionally graded optimized radiation hard InGaN multi-junction space solar cell

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.

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Numerical Simulation of Tunneling Effect in High-Efficiency Perovskite/Silicon Tandem Solar Cell

2020 47th IEEE Photovoltaic Specialists Conference (PVSC) ◽

10.1109/pvsc45281.2020.9300412 ◽

2020 ◽

Author(s):

Y. Agarwal ◽

B. Das ◽

A. J. Dutta ◽

A. A. Deka ◽

S. K. Tripathy ◽

...

Keyword(s):

Numerical Simulation ◽

Solar Cell ◽

High Efficiency ◽

Tunneling Effect ◽

Tandem Solar Cell

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Numerical simulation study for efficiency enhancement of doubly graded perovskite solar cell

Optical Materials ◽

10.1016/j.optmat.2021.111285 ◽

2021 ◽

Vol 118 ◽

pp. 111285

Author(s):

Sagar Bhattarai ◽

Arvind Sharma ◽

Deboraj Muchahary ◽

Dipankar Gogoi ◽

T.D. Das

Keyword(s):

Numerical Simulation ◽

Solar Cell ◽

Simulation Study ◽

Perovskite Solar Cell ◽

Efficiency Enhancement

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

Energy Exploration & Exploitation ◽

10.1177/0144598720983614 ◽

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.

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