کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4929483 534347 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-dimensional analysis of spreading and mixing of miscible compound in heterogeneous variable-aperture fracture
ترجمه فارسی عنوان
تجزیه و تحلیل سه بعدی از پخش و مخلوط کردن ترکیب متقابل در شکست ناپذیر متغیر دیافراگم
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

As mass transport mechanisms, the spreading and mixing (dilution) processes of miscible contaminated compounds are fundamental to understanding reactive transport behaviors and transverse dispersion. In this study, the spreading and dilution processes of a miscible contaminated compound in a three-dimensional self-affine rough fracture were simulated with the coupled lattice Boltzmann method (LBM). Moment analysis and the Shannon entropy (dilution index) were employed to analyze the spreading and mixing processes, respectively. The corresponding results showed that the spreading process was anisotropic due to the heterogeneous aperture distribution. A compound was transported faster in a large aperture region than in a small aperture region due to the occurrence of preferential flow. Both the spreading and mixing processes were highly dependent on the fluid flow velocity and molecular diffusion. The calculated results of the dilution index showed that increasing the fluid flow velocity and molecular diffusion coefficient led to a higher increasing rate of the dilution index.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Science and Engineering - Volume 9, Issue 4, October 2016, Pages 293-299
نویسندگان
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