期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 24, 期 34, 页码 26424-26435出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-017-0017-z
关键词
Electrode disposition; Laplace equation; Electrostatic model; Electric field strength; Unbounded domain; Finite-difference method
资金
- Brazilian funding agency CAPES - Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior
- Brazilian funding agency FAPERJ - Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro
- Brazilian funding agency UFF - Federal Fluminense University
The effectiveness of electrokinetic remediation for soils depends on several factors such as the arrangement and shape of electrodes. This paper presents a numerical study on external electrostatic field generated by seven different electrode configurations in any unbounded two-dimensional domain. The boundary condition at infinity for the voltage is approximated by the iterative algorithm that expands the domain till the limit of the specified tolerance (threshold value). The numerical results indicate that there is no unique configuration with larger effective area for all spacings between the oppositely charged electrodes. In addition, the configuration with the smallest inactive electric field strength spots for all spacings between the electrodes is not unique. Moreover, the voltage profile for all electrode configurations is nonlinear, and the external electric field strength varies widely near the electrodes. Only in the intermediate region between the electrodes the external electric field strength approaches a constant value.
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