DIRECT CURRENT RESISTIVITY MODELING FOR AXIALLY SYMMETRIC BODIES USING THE FINITE ELEMENT METHOD

Geophysics ◽  
1978 ◽  
Vol 43 (3) ◽  
pp. 550-562 ◽  
Author(s):  
H. M. Bibby
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Apparent Resistivity ◽  
Vertical Axis ◽  
Geothermal Field ◽  
Axially Symmetric ◽  
The Finite Element Method ◽  
Cross Sectional ◽  
Resistivity Anisotropy ◽  
Element Method

The finite element method is used to determine numerically the apparent resistivity anomaly caused by the presence of any body with a vertical axis of symmetry embedded in a uniform half‐space. The potential for a point source of current, and hence the apparent resistivity, is determined in the form of a Fourier series. The use of the finite element method enables certain classes of resistivity anisotropy to be modeled. Several examples of bipole‐dipole apparent resistivity enable us to examine assumptions that are necessarily made when inhomogeneities are approximated by models for which explicit solutions exist for the potential. An application to the Broadlands geothermal field suggests that the horizontal cross‐sectional area of the geothermal reservoir increases with depth, consistent with a decrease in the permeability with depth.

scholarly journals Research on the settlement of levee and the formation mechanism of pavement crack in heightening and thickening levee engineering

2021 ◽  
Vol 233 ◽  
pp. 03023
Author(s):  
Donghe Ma ◽  
Chun Tan ◽  
Xin Liu ◽  
Peng Wang ◽  
Songling Han
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Formation Mechanism ◽  
Additional Stress ◽  
The Finite Element Method ◽  
Cross Sectional ◽  
Significant Difference ◽  
The Cross ◽  
Element Method

In view of the heightening and thickening levee project which already built, the settlement and deformation on the top of the landside slope of levee and the cracks on the levee were investigated. The finite element method was used to simulated the settlement of the levee. The results show that after heightening and thickening, the thickness of the new filled soil is uneven in the cross-sectional direction of the levee, resulting in a significant difference in the distribution of additional stress and settlement. In addition, the top of the original levee has smaller deformation, while the newly filled levee has larger deformation, which causes uneven settlement on the top of the embankment. The presented results have guiding significance for the settlement and deformation prevention of levee project.

scholarly journals Finite element method usage in determining pressure distribution of periodontal tissues on maxillary canine as result of orthodontic force

2011 ◽  
Vol 23 (2) ◽  
Author(s):  
E. Elih ◽  
Tono S. Hambali ◽  
Jono Salim ◽  
Endah Mardiati
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Pressure Distribution ◽  
Maximum Pressure ◽  
The Finite Element Method ◽  
Maxillary Canine ◽  
Cross Sectional ◽  
Orthodontic Force ◽  
Periodontal Tissues ◽  
Element Method

The purpose of this study is to obtain data of pressure distribution on canine periodontal tissues due to the orthodontic force generated by various types of motion using the Finite Element Method. The development of digital technology creates a numerical analysis for orthodontic treatment that can be done by performing 3-D reconstruction by scanning the maxillary canine teeth with a CT scan so that 255 cross-sectional images is obtained. 3 D model is then processed using the Finite Element Method to obtain the pressure distribution on the periodontal tissues caused by tipping movements, bodily, torque, roots, rotation, and extrusion. The analysis used was the analysis of qualitative and quantitative analysis. The results showed that the maximum pressure that occurs in the periodontal tissues caused by a variety of movements ranging from 3.3 x 10-3MPa to 2.9 x 10-2 MPa. This indicates that the force exerted on each movement produces maximum pressure that exceeds capillary pressure was 2 x 10-3 MPa.

Design of Variable Airship Mechanism Based on Finite Element Method

2013 ◽  
Vol 690-693 ◽  
pp. 1899-1902
Author(s):  
Zhi Yuang Xiao ◽  
Mu Qing Yang ◽  
Dong Li Ma ◽  
Zheng Neng Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Structural Design ◽  
Safety Margin ◽  
Research Direction ◽  
The Finite Element Method ◽  
Cross Sectional ◽  
Variation Mechanism ◽  
Important Research Direction ◽  
Element Method

Variable airship is an important research direction because it can overcome the difficulties in climbing phase caused by huge volume, and can also solve the problem of insufficient strength. The requirements of variation bring significant challenges for the airship structural design. In this paper, a radial variation mechanism was proposed based on an existing airship. The mechanism can achieve a continuous variation of the cross-sectional area from 100 to 7.2 percent. The airship structure was analyzed using the finite element method to make sure the airship has a high safety margin in various conditions.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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