تخمین اندازۀ حفره‌ها و نفوذپذیری در محیط متخلخل با استفاده از پردازش تصویر

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی شیمی، دانشگاه صنعتی سهند، تبریز، ایران

چکیده

در این پژوهش با تصویربرداری از بستر ذرات کروی و استفاده از پردازش تصویر، اطلاعات ریخت‌شناختی محیط متخلخل نظیر توزیع اندازۀ ذرات و حفره‌ها، تعداد ذرات و تخلخل استخراج شد. با بررسی داده­های به دست آمده، مشاهده شد که نسبت میانگین قطر حفره‌ها به میانگین قطر ذرات با تخلخل رابطۀ لگاریتمی دارد. با توجه به اهمیت محاسبۀ ضریب نفوذپذیری در محیط­های متخلخل، از مدل شبکۀ حفره­ای استفاده شد. برای ساخت شبکۀ حفره­ای کلیۀ اطلاعات استخراجشده از تصویر به کار رفت. بعد از اعمال معادلات حاکم در شبکه، توزیع فشار، دبی جریان و درنتیجه ضریب نفوذپذیری حساب شد. نتایج حاصل از شبیه­سازی برای اعتبارسنجی با ضریب نفوذپذیری اندازه­گیری شده در آزمایش و معادلات تجربی کارمن-کوزنی و ربانی و همکاران مقایسه و مشاهده شد که نتایج آزمایشگاهی با نتایج مدل شبکۀ حفره­ای بهدلیل در نظر گرفتن ساختار داخلی محیط متخلخل به‌صورت حفره‌ها و گلویی­ها مطابقت بیشتری دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Estimation of Pore Size and Permeability in Porous Media Using Image Processing

نویسندگان [English]

  • M. Kianinia
  • S. M. Abdoli
  • S. Shafiei
Sahand University of Technology
چکیده [English]

In this study, the porous media's morphological information, such as pore and particle size distribution, number of particles, and porosity, was extracted using image processing by imaging the spherical particle bed. The findings revealed that the ratio between the average pore diameter and the mean particle diameter is logarithmically related to porosity. The pore network model was used to measure the permeability in porous media. To create a pore network, all of the information derived from the image was used. The pressure distribution, flow rate, and consequently, the permeability have been determined after applying the governing equations in the network. The simulation findings for validation were compared to the permeability calculated in the experiment and the Carmen-Kozeny and Rabbani et al. equations. It was observed that the experimental results are more consistent with the results of the pore network model due to considering the internal structure of the porous media in the form of pores and throats.

کلیدواژه‌ها [English]

  • Image Processing
  • Pore Size Distribution
  • Pore Network Model
  • Permeability

 

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