A study for the prediction of corona power on electrostatic  precipitator based on simple and easy two-dimensional  electrostatic simulation

This study examines how the designing of an electrostatic precipitator can be carried out in a simple way. While it is of value to find out the theoretical values of design parameters using three-dimensional finite element model and numerical method, this study shows that employ-ing a two-dimensional finite element model and easily usable public-domain program is equally simple and fast. Variations of some physical properties occurring between an electrode and a duct are expressed using two design parameters. In this process, the design of the experi-ment and the response surface method are used based on the two-dimensional finite element model, as well as electrostatic simulation. A test using an electrostatic precipitator is performed and it is confirmed that a variation of corona power by the test is most similar with the varia-tion of stored energy by the simulation. A conversion factor that can predict corona power with the response surface function for the stored energy is proposed.

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Three-Dimensional Response of the Supported-Deep Excavation System: Case Study of a Large Scale Underground Metro Station

Geosciences ◽

10.3390/geosciences10020076 ◽

2020 ◽

Vol 10 (2) ◽

pp. 76

Author(s):

Ashraf Hefny ◽

Mohamed Ezzat Al-Atroush ◽

Mai Abualkhair ◽

Mariam Juma Alnuaimi

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Large Scale ◽

Three Dimensional ◽

Element Model ◽

Two Dimensional ◽

Deep Excavation ◽

Metro Station ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element

The complexities and the economic computational infeasibility associated in some cases, with three-dimensional finite element models, has imposed a motive for many investigators to accept numerical modeling simplification solutions such as assuming two-dimensional (2D) plane strain conditions in simulation of several supported-deep excavation problems, especially for cases with a relatively high aspect ratio in plan dimensions. In this research, a two-dimensional finite element model was established to simulate the behavior of the supporting system of a large-scale deep excavation utilized in the construction of an underground metro station Rod El Farrag project (Egypt). The essential geotechnical engineering properties of soil layers were calculated using results of in-situ and laboratory tests and empirical correlations with SPT-N values. On the other hand, a three-dimensional finite element model was established with the same parameters adopted in the two-dimensional model. Sufficient sensitivity numerical analyses were performed to make the three-dimensional finite element model economically feasible. Results of the two-dimensional model were compared with those obtained from the field measurements and the three-dimensional numerical model. The comparison results showed that 3D high stiffening at the primary walls’ corners and also at the locations of cross walls has a significant effect on both the lateral wall deformations and the neighboring soil vertical settlement.

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Mechanics of Die-less Asymmetric Rolling for Fabrication of Compound Curved Plates

Journal of Manufacturing Science and Engineering ◽

10.1115/1.1616950 ◽

2003 ◽

Vol 125 (4) ◽

pp. 787-793 ◽

Cited By ~ 2

Author(s):

Jong-Gye Shin ◽

Yang-Ryul Choi ◽

Hyunjune Yim

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Three Dimensional ◽

Element Model ◽

Two Dimensional ◽

Asymmetric Rolling ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element ◽

First Time ◽

Curvature Control

The mechanics of die-less asymmetric rolling has been investigated in depth, for the first time, using a two-dimensional analytical model and a three-dimensional finite element model. In doing so, the physical understanding of mechanics underlying die-less asymmetric rolling has greatly been enhanced. Moreover, the asymmetry in roller radii was found to be the most effective parameter for curvature control, in the considered ranges of various parameters.

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